Philips TDA9818T, TDA9818, TDA9817TS, TDA9817T, TDA9817 Datasheet

INTEGRATED CIRCUITS

DATA SH EET

TDA9817; TDA9818

Single/multistandard VIF/SIF-PLL and FM-PLL/AM demodulators

Preliminary speciﬁcation Supersedes data of 1997 May 12 File under Integrated Circuits, IC02

2001 Oct 19

Philips Semiconductors Preliminary speciﬁcation

Single/multistandard VIF/SIF-PLL and FM-PLL/AM demodulators

FEATURES

• 5 V supply voltage

• Applicable for Intermediate Frequencies (IFs) of

38.9, 45.75 and 58.75 MHz

• Gain controlled wide band Video IF (VIF) amplifier (AC-coupled)

• True synchronous demodulation with active carrier regeneration (very linear demodulation, good intermodulation figures, reduced harmonics and excellent pulse response)

• Robustness for over-modulation better than 105% due to gated phase detector at L/L accent standard and PLL-bandwidth controlat negative modulated standards

• Voltage Controlled Oscillator (VCO) frequency switchablebetweenL and L accent(alignmentexternal) picture carrier frequency

• VIF Automatic Gain Control (AGC) detector for gain control, operating as peak sync detector for B/G, peak white detector for L; signal controlled reaction time for L

• Tuner AGC with adjustable TakeOver Point (TOP)

• Automatic Frequency Control (AFC) detector without

extra reference circuit

TDA9817; TDA9818

• AC-coupled limiter amplifier for sound intercarrier signal

• Alignment-free FM Phase-Locked Loop (PLL)

demodulator with high linearity

• Sound IF (SIF) input for single reference Quasi Split Sound (QSS) mode (PLL controlled); SIF AGC detector for gain controlled SIF amplifier; single reference QSS mixer able to operate in high performance single reference QSS mode and in intercarrier mode

• AM demodulator without extra reference circuit

• Stabilizer circuit for ripple rejection and to achieve

constant output signals

• ElectroStatic Discharge (ESD) protection for all pins.

GENERAL DESCRIPTION

The TDA9817 is an integrated circuit for single standard vision IF signal processing and FM demodulation.

The TDA9818 is an integrated circuit for multistandard vision IF signal processing, sound AM and FM demodulation.

ORDERING INFORMATION

TYPE NUMBER

NAME DESCRIPTION VERSION

TDA9817 SDIP24 plastic shrink dual in-line package; 24 leads (400 mil) SOT234-1 TDA9817T SO24 plastic small outline package; 24 leads; body width 7.5 mm SOT137-1 TDA9817TS SSOP24 plastic shrink small outline package; 24 leads; body width 5.3 mm SOT340-1 TDA9818 SDIP24 plastic shrink dual in-line package; 24 leads (400 mil) SOT234-1 TDA9818T SO24 plastic small outline package; 24 leads; body width 7.5 mm SOT137-1 TDA9818TS SSOP24 plastic shrink small outline package; 24 leads; body width 5.3 mm SOT340-1

PACKAGE

2001 Oct 19 2

Philips Semiconductors Preliminary speciﬁcation

Single/multistandard VIF/SIF-PLL and

TDA9817; TDA9818

FM-PLL/AM demodulators

QUICK REFERENCE DATA

SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT

i(VIF)(rms)

o(CVBS)(p-p)

v(−3dB)

S/N

IM(1.1)

IM(3.3)

H(sup)

i(SIF)(rms)

o(FM)(rms)

o(AM)(rms)

THD

audio

S/N

W(audio)

supply voltage 4.5 5 5.5 V supply current 76 90 104 mA vision IF input signal voltagesensitivity

−1 dB video at output − 60 100 µV

(RMS value) video output signal voltage

0.97 1.1 1.23 V

(peak-to-peak value)

−3 dB video bandwidth on pin CVBS B/G and L standard;

78−MHz

CL< 50 pF; RL>1kΩ; AC load weighted signal-to-noise ratio for video 56 60 − dB intermodulation attenuation at ‘blue’ f = 1.1 MHz 58 64 − dB intermodulation attenuation at ‘blue’ f = 3.3 MHz 58 64 − dB suppression of video signal harmonics 35 40 − dB sound IF input signal voltage

−3 dB at intercarrier output − 50 100 µV

sensitivity (RMS value) audio output signal voltage for FM

(RMS value)

B/G standard; 27 kHz,

54% modulation

M/N standard;

0.4 0.5 0.6 V

0.36 0.45 0.54 V

25 kHz modulation audio output signal voltage for AM

L standard; 54% modulation 0.4 0.5 0.6 V (RMS value)

total harmonic distortion audio signal 54% modulation

FM − 0.2 0.5 % AM − 0.5 1.0 %

weighted signal-to-noise ratio audio

54% modulation signal

FM 55 60 − dB AM 47 53 − dB

2001 Oct 19 3

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2001 Oct 19 4

L/L accent switch

and adjust

2 × f

VIF

SAW

SIF

SAW

TAGC

VIF1 VIF2

SIF1 SIF2

TUNER

AGC

1 2

23 24

VIF AMPLIFIER FPLL

SIF AMPLIFIER

VAGC

BLTOP LADJ VCO2 VCO1

(1)

422

VIF

AGC

PLL

615

(1)

QSS MIXER

INTERCARRIER MIXER

AM DEMODULATOR

VCO TWD

AFC

DETECTOR

VIDEO DEMODULATOR AND AMPLIFIER

AFC

VOLTAGE

REFERENCE

GND

2021171819

CVBS

1.1 V (p-p)

SOUND

TRAP

video 1 V (p-p)

audio

BLOCK DIAGRAM

Philips Semiconductors Preliminary speciﬁcation

Single/multistandard VIF/SIF-PLL and

FM-PLL/AM demodulators

intercarrier

mode

SIF

AGC

(1) Not connected for TDA9817, TDA9817T and TDA9817TS.

INTERCARRIER

MODE SWITCH

5 C

SAGC

standards

selection

switch

(1)

TDA9817 TDA9818

Fig.1 Block diagram.

12 QSSSTD

5.5 MHz

handbook, full pagewidth

FM-PLL

DEMODULATOR

10 11

de-em

mute

switch

de-em

DEC

MHA663

TDA9817; TDA9818

Philips Semiconductors Preliminary speciﬁcation

Single/multistandard VIF/SIF-PLL and FM-PLL/AM demodulators

PINNING

SYMBOL PIN DESCRIPTION

VIF1 1 VIF differential input signal voltage 1 VIF2 2 VIF differential input signal voltage 2 STD 3 standards selection switch; note 1 C

VAGC

SAGC

PLL

LADJ 7 L/L accent switch and adjust; note 1 AF 8 audio output V

de-em

DEC

QSS 12 single reference QSS/intercarrier

TAGC 14 tuner AGC output C

CVBS 16 composite video output voltage AFC 17 AFC output VCO1 18 VCO1 resonance circuit VCO2 19 VCO2 resonance circuit GND 20 ground V

TOP 22 tuner AGC takeover point adjust SIF1 23 SIF differential input signal voltage1 SIF2 24 SIF differential input signal voltage2

4 VIF AGC capacitor 5 SIF AGC capacitor 6 PLL ﬁlter

9 de-emphasis output 10 de-emphasis input 11 decoupling capacitor

output voltage

13 sound intercarrier input voltage

15 black level detector; note 1

21 supply voltage

handbook, halfpage

C C

LADJ

V C

(1) Not connected for TDA9817.

VIF1 VIF2

STD

VAGC SAGC

PLL

de-em de-em

DEC QSS

1 2

(1)

3 4 5 6

(1)

7 8

9 10 11 12

Fig.2 Pin configuration SDIP24.

TDA9817; TDA9818

SIF2

SIF1

TOP

GND

VCO2

MHA664

VCO1

AFC

CVBS

(1)

TAGC

14 13

TDA9818 TDA9817

Note

1. Not connected for TDA9817, TDA9817T and TDA9817TS.

2001 Oct 19 5

Philips Semiconductors Preliminary speciﬁcation

Single/multistandard VIF/SIF-PLL and FM-PLL/AM demodulators

handbook, halfpage

STD

VAGC

SAGC

LADJ

de-em

de-em C

VIF1 VIF2

PLL

DEC

QSS

1 2

(1)

3 4 5 6

TDA9818T

7 8

9 10 11 12

TDA9817T

(1)

MGU397

SIF2

SIF1

TOP

GND

VCO2

VCO1

AFC

CVBS

(1)

TAGC FM

handbook, halfpage

STD

VAGC

SAGC

LADJ

de-em

de-em C

VIF1 VIF2

PLL

DEC QSS

(1)

10 11 12

TDA9817; TDA9818

1 2 3 4 5 6

TDA9818TS TDA9817TS

7 8 9

MGU398

SIF2

SIF1

TOP

GND

VCO2

VCO1

AFC CVBS

(1)

TAGC FM

(1) Not connected for TDA9817T.

Fig.3 Pin configuration SO24.

2001 Oct 19 6

(1) Not connected for TDA9817TS.

Fig.4 Pin configuration SSOP24.

Philips Semiconductors Preliminary speciﬁcation

Single/multistandard VIF/SIF-PLL and FM-PLL/AM demodulators

FUNCTIONAL DESCRIPTION

The integrated circuit comprises the functional blocks as shown in Fig.1:

• Vision IF amplifier and VIF AGC detector

• Tuner AGC

• Frequency Phase Locked Loop detector (FPLL)

• VCO, Travelling Wave Divider (TWD) and AFC

• Video demodulator and amplifier

• Sound IF amplifier and SIF AGC

• Single reference QSS mixer

• AM demodulator

• FM-PLL demodulator

• Audio Frequency (AF) signal processing

• Internal voltage stabilizer.

Vision IF ampliﬁer and VIF AGC detector

The vision IF amplifier consists of three AC-coupled differential amplifier stages. Each differential stage comprises a feedback network controlled by emitter degeneration.

The AGC detector generates therequired VIF gain control voltage for constant video output by charging/discharging the AGC capacitor. Therefore for negative video modulation the sync level and for positive video modulation the peak white level of the video signal is detected. In order to reduce the reaction time for positive modulation, where a very large time constant is needed, an additional level detector increases the discharging current of the AGC capacitor (fast mode) in the event of a decreasing VIF amplitude step. The additional level information is given by the black-level detector voltage.

Tuner AGC

The AGC capacitor voltage is converted to an internal IF control signal, and is fed to the tuner AGC to generate the tuner AGC output current at pin TAGC (open-collector output). The tuner AGC takeover point can be adjusted at pin TADJ. This allows to match the tuner to the SAW filter in order to achieve the optimum IF input level.

Frequency Phase Locked Loop detector (FPLL)

The VIF-amplifier output signal is fed into a frequency detector and into a phase detector via a limiting amplifier. During acquisition the frequency detector produces a DC current proportional to the frequency difference between the input and the VCO signal. After frequency lock-in the phase detector produces a DC current

TDA9817; TDA9818

proportionalto the phase differencebetween the VCO and the input signal. The DC current of either frequency detector or phase detector is converted into a DC voltage viathe loop filter, whichcontrols the VCO frequency.Inthe event of positive modulated signals the phase detector is gated by composite sync in order to avoid signal distortion for overmodulated VIF signals.

VCO, Travelling Wave Divider (TWD) and AFC

The VCO operates with a resonance circuit (with L and C in parallel) at double the picture carrier frequency. The VCO is controlled by two integrated variable capacitors. The control voltage required to tune the VCO from its free-running frequency to actually double the picture carrier frequency is generated by the frequency-phase detector (FPLL) and fed via the loop filter to the first variable capacitor. This control voltage is amplified and additionally converted into a current which represents the AFC output signal. At centre frequency the AFC output current is equal to zero.

For TDA9818: the VCO centre frequency can be decreased (required for L accent standard) by activating an additional internal capacitor. This is achieved by using the L accent switch. In this event the second variable capacitor can be controlled by a variable resistor at the L accentswitchforsettingtheVCOcentrefrequencytothe required L accent value.

The oscillator signal is divided by 2 with a TWD which generates two differential output signals with a 90 degree phase difference independent of the frequency.

Video demodulator and ampliﬁer

The video demodulator is realized by a multiplier which is designed for low distortion and large bandwidth. The vision IF input signal is multiplied with the ‘in phase’ signal of the travelling wave divider output. In the demodulator stage the video signal polarity can be switched in accordance with the TV standard.

The demodulator output signal is fed via an integrated low-pass filter for attenuation of the carrier harmonics to the video amplifier. The video amplifier is realized by an operational amplifier with internal feedback and high bandwidth. A low-pass filter is integrated to achieve an attenuation of the carrier harmonics for B/G and L standard. The standard dependent level shift in this stage delivers the same sync level for positive and negative modulation. The video output signal at pin CVBS is 1.1 V (p-p) for nominal vision IF modulation, in order to achieve 1 V (p-p) at sound trap output.

2001 Oct 19 7

Philips Semiconductors Preliminary speciﬁcation

Single/multistandard VIF/SIF-PLL and FM-PLL/AM demodulators

Sound IF ampliﬁer and SIF AGC

The sound IF amplifier consists of two AC-coupled differential amplifier stages. Each differential stage comprises a controlled feedback network provided by emitter degeneration.

The SIF AGC detector is related to the SIF input signal (average level of AM or FM carrier) and controls the SIF amplifier to provide a constant SIF signal to the AM demodulator and single reference QSS mixer. At L standard (AM sound) the SIF AGC reaction time is set to ‘slow’ for nominal video conditions. But with a decreasing VIF amplitude step the SIF AGC is set to ‘fast’ mode controlled by the VIF AGC detector. In FM mode this reaction time is always ‘fast’.

Single reference QSS mixer

The single reference QSS mixeris realized by a multiplier. The SIF amplifier output signal is fed to the single reference QSS mixer and converted to intercarrier frequency by the regenerated picture carrier (VCO). The mixer output signal is fed via a high-pass for attenuation of the video signal components to the output pin QSS. With this system a high performance hi-fi stereo sound processing can be achieved.

For a simplified application without a sound IF SAW filter the single reference QSS mixer can be switched to the intercarrier mode byconnecting pin SIF2 to ground. In this mode the sound IF passes the vision IF SAW filter and the composite IF signal is fed to the single reference QSS mixer. This IF signal is multiplied with the 90 degree TWD output signal for converting the sound IF to intercarrier frequency. This composite intercarrier signal is fed to the output pin QSS, too. By using this quadrature detection, the low frequency video signals are removed.

AM demodulator

The AM demodulator is realized by a multiplier. The modulated SIF amplifier output signal is multiplied in phase with the limited (AM is removed) SIF amplifier output signal. The demodulator output signal is fed via an integrated low-pass filter for attenuation of the carrier harmonics to the AF amplifier.

TDA9817; TDA9818

FM-PLL demodulator

The FM-PLL demodulator consists of a limiter and an FM-PLL. The limiter provides the amplification and limitation of the FM sound intercarrier signal. The result is high sensitivity and AM suppression. The amplifier consists of 7 stages which are internally AC-coupled in order to minimize the DC offset.

Furthermore the AF output signal can be muted by connecting a resistor between the limiter input pin FM and ground.

TheFM-PLL consists of anintegrated relaxation oscillator, an integrated loop filter and a phase detector. The oscillator is locked to the FM intercarrier signal, output from the limiter. As a result of locking, the oscillator frequency tracks with the modulation of the input signal and the oscillator control voltage is superimposed by the AF voltage. The FM-PLL operates as an FM demodulator.

Audio Frequency signal processing

The AF amplifier consists of two parts:

1. The AF pre-amplifier for FM sound is an operational amplifier with internal feedback, high gain and high common mode rejection. The AF voltage from the PLL demodulator, by principle a small output signal, is amplified by approximately 33 dB. The low-pass characteristicoftheamplifierreducestheharmonicsof the intercarrier signal at the sound output terminal pin V sound is applied. An additional DC control circuit is implemented to keep the DC level constant, independent of process spread.

2. The AF output amplifier (10 dB) provides the required output level by a rail-to-rail outputstage. This amplifier makes use of an input selector for switching to AM, FM de-emphasis or mute state, controlled by the standard switching voltage and the mute switching voltage.

Internal voltage stabilizer

The bandgap circuit internally generates a voltage of approximately 1.25 V, independent of supply voltage and temperature. A voltage regulator circuit, connected to this voltage, produces a constant voltage of 3.6 V which is used as an internal reference voltage.

at which the de-emphasis network for FM

de-em

2001 Oct 19 8

Philips Semiconductors Preliminary speciﬁcation

Single/multistandard VIF/SIF-PLL and

TDA9817; TDA9818

FM-PLL/AM demodulators

LIMITING VALUES

In accordance with the Absolute Maximum Rating System (IEC 60134).

SYMBOL PARAMETER CONDITIONS MIN. MAX. UNIT

sc(max)

TAGC

stg

amb

esd

supply voltage TDA9817, TDA9817T,

TDA9818 and TDA9818T: maximum chip temperature of 120 °C; note 1

TDA9817TS and TDA9818TS: maximum chip temperature of 130 °C; note 1

voltage at pins VIF1, VIF2, STD, C C

, T

SAGC

PLL

, V

de-em

, C

de-em

, C

DEC

VAGC

, FMin,

TAGC, CBL, AFC, VP, TOP, SIF1 and SIF2 maximum short-circuit time to ground or V

tuner automatic gain control output voltage 0 13.2 V storage temperature −25 +150 °C ambient temperature −20 +70 °C electrostatic handling voltage note 2 −300 +300 V

− 5.5 V

− 10 s

Notes

1. I

= 104 mA; T

TDA9818T, R

=70°C; R

amb

= 110 K/W for TDA9817TS and TDA9818TS.

th(j-a)

= 65 K/W for TDA9817 and TDA9818, R

th(j-a)

= 85 K/W for TDA9817T and

th(j-a)

2. Machine model class B (L = 2.5 µH).

THERMAL CHARACTERISTICS

SYMBOL PARAMETER CONDITIONS VALUE UNIT

th(j-a)

thermal resistance from junction to ambient in free air

TDA9817; TDA9818 65 K/W TDA9817T; TDA9818T 85 K/W TDA9817TS; TDA9818TS 110 K/W

2001 Oct 19 9

Philips Semiconductors Preliminary speciﬁcation

Single/multistandard VIF/SIF-PLL and

TDA9817; TDA9818

FM-PLL/AM demodulators

CHARACTERISTICS

VP=5V; T peak white level for L); IF input from 50 Ω via broadband transformer 1 : 1; video modulation DSB; residual carrier B/G: 10%; L = 3%; video signal in accordance with Fig.15; unless otherwise speciﬁed.

SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT

Supply (pin V

Vision IF ampliﬁer (pins VIF1 and VIF2)

i(VIF)(rms)

i(VIF)(max)(rms)

∆V

(IF)(int)

IF(ctrl)

i(dif)

I(VIF)

True synchronous video demodulator; note 3 f

VCO(max)

∆f

/∆T oscillator drift as a function

osc

∆f

/∆V

osc

VCO(rms)

cr(pc)

∆f

pc(fr)

algn(Laccent)

acq

=25°C; see Table 1 for input frequencies and levels; input level V

amb

“CCIR, line 17”

)

supply voltage note 1 4.5 5 5.5 V supply current 76 90 104 mA

input signal voltage sensitivity (RMS value)

maximum input signal voltage (RMS value)

internal IF amplitude difference between picture and sound carrier

B/G standard; −1 dB video at output

B/G standard; 1 dB video at output

within AGC range; B/G standard;

∆f = 5.5 MHz IF gain control range see Fig.5 65 70 − dB differential input resistance note 2 1.7 2.2 2.7 kΩ differential input

note 2 1.2 1.7 2.5 pF capacitance

DC input voltage note 2 − 3.4 − V

maximum oscillator

f=2f

frequency for carrier regeneration

oscillator is free-running; of temperature

oscillator shift as a function of supply voltage

= 0; note 4

AFC

oscillator is free-running;

note 4 oscillator voltage swing at

pins VCO1 and VCO2 (RMS value)

picture carrier capture range

picture carrier frequency (free-running) accuracy

L accent alignment

B/G, M/N and L standard ±1.4 ±1.8 − MHz

L accent standard;

= 33.9 MHz;

= 5.6 kΩ

LADJ

L accent standard;

fpc= 33.9 MHz;

= 5.6 kΩ

LADJ

L accent standard; I

AFC

frequency range acquisition time BL = 70 kHz; note 5 −−30 ms

i(VIF)(rms)

“NTC-7 Composite”

= 10 mV (sync level for B/G,

; measurements taken in

− 60 100 µV

120 200 − mV

− 0.7 1 dB

125 130 − MHz

−−±20 × 10−6K

−−±1.5 × 10−3V

50 80 110 mV

±0.9 ±1.2 − MHz

−±200 ±400 kHz

=0 ±400 ±600 − kHz

−1

2001 Oct 19 10

Philips Semiconductors Preliminary speciﬁcation

Single/multistandard VIF/SIF-PLL and

TDA9817; TDA9818

FM-PLL/AM demodulators

SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT

i(VIF)(sens)(rms)

Composite video ampliﬁer (pin CVBS); sound carrier off

o(CVBS)(p-p)

V/S ratio between video

∆V

o(CVBS)

sync

clip(u)

clip(l)

bias(int)

o(sink)(max)

o(source)(max)

∆V

o(CVBS)(B/G)

∆V

o(BL)(B/G)

∆V

o(BL)(L)

dif

v(−1dB)

v(−3dB)

S/N

S/N unweightedsignal-to-noise

VIF input signal voltage

maximum IF gain; note 6 − 30 70 µV sensitivity for PLL to be locked (RMS value); pins VIF1 and VIF2

output signal voltage

see Fig.10 0.97 1.1 1.23 V (peak-to-peak value)

1.9 2.33 3.0 (black-to-white) and sync level

output signal voltage difference

difference between B/G and L standard

−−±12 %

sync voltage level B/G and L standard 1.4 1.5 1.6 V upper video clipping

VP− 1.1 VP− 1 − V

voltage level lower video clipping

− 0.7 0.9 V voltage level

output resistance note 2 −−10 Ω internal DC bias current for

2.2 3.0 − mA emitter-follower

maximum AC and DC

1.6 −− mA output sink current

maximum AC and DC

2.9 −− mA output source current

deviation of CVBS output signal voltage at

50 dB gain control −−0.5 dB 30 dB gain control −−0.1 dB

B/G standard black level tilt in

gain variation; note 7 −−1%

B/G standard vertical black level tilt for

worst case in L standard

vision carrier modulated by test line (VITS) only; gain

−−1.9 %

variation; note 7 differential gain differential phase

−1 dB video bandwidth B/G and L standard;

“CCIR, line 330”

− 25 %

− 1 2 deg

56− MHz CL< 50 pF; RL> 1kΩ; AC load

−3 dB video bandwidth B/G and L standard;

78− MHz CL< 50 pF; RL> 1kΩ; AC load

weighted signal-to-noise

see Fig.7; note 8 56 60 − dB

ratio

see Fig.7; note 8 49 53 − dB

ratio

2001 Oct 19 11

Philips Semiconductors Preliminary speciﬁcation

Single/multistandard VIF/SIF-PLL and

TDA9817; TDA9818

FM-PLL/AM demodulators

SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT

IM(1.1)

IM(3.3)

∆f

unwanted(p-p)

∆ϕ robustness for modulator

vc(rms)

H(sup)

H(spur)

PSRR power supply ripple

VIF AGC detector (pins C

dch

resp(inc)

resp(dec)

∆IF VIF amplitude step for

th(CBL)

intermodulation attenuation at ‘blue’

intermodulation attenuation at ‘yellow’

intermodulation attenuation at ‘blue’

intermodulation attenuation at ‘yellow’

robustness for unwanted frequency deviation of picture carrier (peak-to-peak value)

imbalance

f = 1.1 MHz; see Fig.8; note 9

f = 3.3 MHz; see Fig.8; note 9

L standard; residual carrier: 3%; serration pulses: 50%; note 2

L standard; residual carrier: 0%;

58 64 − dB

60 66 − dB

58 64 − dB

59 65 − dB

−−12 kHz

−−3%

serration pulses: 50%; note 2

residual vision carrier (RMS value)

fundamental wave and harmonics; B/G and

− 25 mV

L standard

suppression of video

note 10a 35 40 − dB

signal harmonics spurious elements note 10b 40 −− dB

video signal; grey level;

rejection at pin CVBS

see Fig.13

B/G standard 30 35 − dB L standard 26 30 − dB

and CBL)

VAGC

charging current B/G and L standard; note 7 0.75 1 1.25 mA additional charging current L standard in event of

1.9 2.5 3.1 µA missing VITS pulses and no white video content

discharging current B/G standard 15 20 25 µA

normal mode L 225 300 375 nA fast mode L 30 40 50 µA

AGC response to an increasing VIF step

AGC response to a decreasing VIF step

B/G and L standard;

− 0.05 0.1 ms/dB note 11

B/G standard − 2.2 3.5 ms/dB fast mode L − 1.1 1.8 ms/dB normal mode L; note 11 − 150 240 ms/dB L standard −2 −6 −10 dB

activating fast AGC mode threshold voltage level

additional charging current

see Fig.10

L standard 1.95 2.0 2.05 V L standard; fast mode L 1.6 1.66 1.72 V

2001 Oct 19 12

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