NTE NTE1806 Datasheet

NTE1806

Integrated Circuit

Head Amplifier Circuit for 4 Head VCR

Features:

D Built–in Enveloped Comparing Circuit
D Built–in Peaking Amplifier Circuit
D Less Noise Voltage Referred to Input: 1µV

Absolute Maximum Ratings: (TA = +25°C unless otherwise specified)
Supply Voltage, V

Power Dissipation (T
Operating Ambient Temperature, T
Storage Temperature Range, T

C

= +70°C), P

A

D

opr

stg

Electrical Characteristics: (TA = +25°C, VCC = 5V unless otherwise specified)

Parameter Symbol Test Conditions Min Typ Max Unit

rms

6V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

250mW. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

–20° to +70°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

–55° to +150°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Circuit Current I
Channel I Gain G
Channel II Gain G
Channel III Gain G
Channel IV Gain G
AGC Output Amplitude υ
AGC Control Sensitivity υ
Head Switch Changeover Sensitivity S
Head Amp Switch Changeover Sensitivity S
Noise Voltage Referred to Input (I) V
Noise Voltage Referred to Input (II) V
Noise Voltage Referred to Input (III) V
Noise Voltage Referred to Input (IV) V
Envelope Comparative Output Amplitude υ
Envelope Comparative Output Stop Sensitivity S

Note 1. Operating Supply Voltage Range: V

16
3–15
4–15
8–15
9–15

20
20

1

11
ni3–15
ni4–15
ni8–15
ni9–15

14
17

CC(opr)

16 – 40 mA
f = 1MHz 50.5 – 60.5 dB
f = 1MHz 50.5 – 60.5 dB
f = 1MHz 50.5 – 60.5 dB
f = 1MHz 50.5 – 60.5 dB
f = 4MHz 100 – 190 mυ
f = 4MHz – – 3 dB

– – 1 V

– – 1 V
1MHz BFP – – 1 µV
1MHz BFP – – 1 µV
1MHz BFP – – 1 µV
1MHz BFP – – 1 µV

4.3 – – V
– – 1.2 V

= 4.5 to 5.5V

P–P

rms
rms
rms
rms

P–P

Pin Connection Diagram

Head Switch Changeover

Bias (I)

Input (I)

Initial Stage

Input (II)

Input Stage GND

Bias (III)

Initial Stage

Input (III)

Input (IV)

Bias (IV)

Head Amp Switch Changeover

1
2
3
4
5Bias (II)
6
7
8

22
21
20
19
18
17
16
15

9 14
10 13
11 12

AGC Control Signal Design
AGC Reverse Phase Output

AGC Output
Output Stage GND
Peaking Circuit Peak Constant

Envelope Comparative Circuit
Stop Switch
V

CC

Chroma Output
Envelope Comparative Output

Side Envelope Detection (III, IV)
Side Envelope Detection (I, II)

22 12

111

.756 (19.2) .252 (6.4)

.177
(4.5)

.300 (7.62).135 (3.43).070 (1.78)