Philips TEA6101T, TEA6101 Datasheet

INTEGRATED CIRCUITS

DATA SH EET

TEA6101/T

Antenna diversity circuit

Objective specification
File under Integrated circuits, IC01

May 1992

Philips Semiconductors Objective specification

Antenna diversity circuit TEA6101/T

FEATURES

• Ability to switch between up to four antennae

• Switching signal derived from two signals: the audio and

the level signals

• Floating switching threshold adjusts switching rate to
prevailing circumstances:

– increasing threshold due to excessive noise
– increasing threshold due to numerous level variations

GENERAL DESCRIPTION

Intended for multi-antenna FM car radio reception
(antenna diversity system), the TEA6101/T selects the
most favourable signal from one of up to four antennae.
Founded upon audible signal disturbance the criteria are
derived from two signals: high frequency components (e.g.
spikes due to noise and multipath reception) and
variations in signal level as a result of multipath reception
or fluctuations in field strength.

• Memory for the most favourable antenna signal to
overcome unnecessary switching

• Signal-dependent `soft` muting circuit

• Mode selection to the first antenna receiving an AM

signal whilst the diversity system is reset.

APPLICATIONS

• Car radio receivers

• Mobile radio communications equipment

QUICK REFERENCE DATA

SYMBOL PARAMETER MIN. TYP. MAX. UNIT

V

P

I

P

V

I(p-p)

I

os

V

L

T

amb

positive supply voltage − 8.5 − V
positive supply current − 14 − mA
audio input voltage (peak-to-peak value) −−3V
antenna switch output current (source/sink) −−7mA

−3 dB audio attenuation (soft mute) − 1.45 − V
operating ambient temperature range −30 − +85 °C

ORDERING INFORMATION

PACKAGE

EXTENDED TYPE NUMBER

PINS PIN POSITION MATERIAL CODE

TEA6101 18 DIL plastic SOT102
TEA6101T 20 SO plastic SOT163A

Notes

1. SOT102-1; 1996 September 10.

2. SOT163-1; 1996 September 10.

May 1992 2

(1)

(2)

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May 1992 3

supply

reference

voltage

0.1 µF

STABILIZER

1.5

R1

kΩ

ADDER

&

offset

TIMING

100

&

reset

R3

47 nF

ground

20

OFFSET

&

1

complete stop reset

Ω

15 2

memory
timing

MEMORY

LOAD

COMPARATOR

4 - STAGE
JOHNSON
COUNTER

MODE SELECT

control

19
18
17
16

level input

via

capacitor

audio input

0.47
µF

delay soft mute

33
nF

level input direct

3.3

kΩ

µF

1

3.3
nF

3

6

5

7

3.6 V
20

k

Ω

V

ref

ADDER

V

U

MUTE

33

audio output

V

I

20

Ω

k

VOLTAGE

REFERENCE

kΩ

14

µF

1

modulus output

4

ADDER

kΩ

1.5
R2

level
averaging

8

HIGH - PASS

FILTER

LOW - PASS

FILTER

offset
voltage

not connected

11 10 13 9 1

ADDER

V

(min)

ADDER

offset

voltage

ADDER

MONOSTABLE

MULTIVIBRATOR

noise

averaging

12

k

Ω

VOLTAGE

REFERENCE

&&

TEA6101T

12

test pin

MBA543 - 1

to

antenna

switch

Philips Semiconductors Objective specification

Antenna diversity circuit TEA6101/T

Fig.1 Block diagram.

handbook, full pagewidth

Philips Semiconductors Objective specification

Antenna diversity circuit TEA6101/T

PINNING

The pin numbers given in parenthesis refer to the
TEA6101

SYMBOL PIN DESCRIPTION

V

P

1 (1) positive supply
CTRL 2 (2) control input
AUDIN 3 (3) audio input
AUDOUT 4 (4) audio output
LID 5 (5) level input direct
LIC 6 (6) level input via capacitor
DSM 7 (7) delay soft mute
MODOUT 8 (8) modulus output
V

ref

9 (9) reference voltage
n.c. 10 − not connected
n.c. 11 − not connected
TEST 12 (10) test pin
NOAV 13 (11) noise averaging
LEAV 14 (12) level averaging
MT 15 (13) memory timing
OUT4 16 (14) output 4
OUT3 17 (15) output 3
OUT2 18 (16) output 2
OUT1 19 (17) output 1
GND 20 (18) ground

handbook, halfpage

MODOUT

Fig.2 Pin configuration (TEA6101T).

V

CTRL

AUDIN

AUDOUT

LID

LIC

DSM

V

REF

n.c.

1

P

2
3
4
5

TEA6101T

6
7
8
9

10

MBA542 - 1

20

GND

19

OUT1

18

OUT2

17

OUT3

16

OUT4

15

MT

14

LEAV

13

NOAV

12

TEST

n.c.

11

May 1992 4

handbook, halfpage

MODOUT

Fig.3 Pin configuration (TEA6101).

V

CTRL

AUDIN

AUDOUT

LID

LIC

DSM

V

REF

1

P

2
3
4
5

TEA6101

6
7
8
9

MBA541 - 1

GND

18

17

OUT1
OUT2

16

OUT3

15

OUT4

14

MT

13

LEAV

12

NOAV

11

TEST

10