NTE NTE1806

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: 1µVrms
Absolute Maximum Ratings: (TA = +25°C unless otherwise specified)
Supply Voltage, VC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6V
Power Dissipation (TA = +70°C), PD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 250mW
Operating Ambient Temperature, Topr . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –20° to +70°C
Storage Temperature Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –55° to +150°C
Electrical Characteristics: (TA = +25°C, VCC = 5V unless otherwise specified)
Parameter
Symbol
Test Conditions
Min
Typ
Max
Unit
16
–
40
mA
Circuit Current
I16
Channel I Gain
G3–15
f = 1MHz
50.5
–
60.5
dB
Channel II Gain
G4–15
f = 1MHz
50.5
–
60.5
dB
Channel III Gain
G8–15
f = 1MHz
50.5
–
60.5
dB
Channel IV Gain
G9–15
f = 1MHz
50.5
–
60.5
dB
AGC Output Amplitude
υ20
f = 4MHz
100
–
190
mυP–P
AGC Control Sensitivity
υ20
f = 4MHz
–
–
3
dB
Head Switch Changeover Sensitivity
S1
–
–
1
V
Head Amp Switch Changeover Sensitivity
S11
–
–
1
V
Noise Voltage Referred to Input (I)
Vni3–15
1MHz BFP
–
–
1
µVrms
Noise Voltage Referred to Input (II)
Vni4–15
1MHz BFP
–
–
1
µVrms
Noise Voltage Referred to Input (III)
Vni8–15
1MHz BFP
–
–
1
µVrms
Noise Voltage Referred to Input (IV)
Vni9–15
1MHz BFP
–
–
1
µVrms
Envelope Comparative Output Amplitude
υ14
4.3
–
–
VP–P
Envelope Comparative Output Stop Sensitivity
S17
–
–
1.2
V
Note 1. Operating Supply Voltage Range: VCC(opr) = 4.5 to 5.5V
Pin Connection Diagram
Head Switch Changeover
Bias (I)
Input (I)
Initial Stage
Input (II)
Bias (II)
Input Stage GND
Bias (III)
Input (III)
Initial Stage
Input (IV)
Bias (IV)
Head Amp Switch Changeover
1
2
3
4
5
6
7
8
9
10
11
22
21
20
19
18
17
16
15
14
13
12
22
12
1
11
.756 (19.2)
AGC Control Signal Design
AGC Reverse Phase Output
AGC Output
Output Stage GND
Peaking Circuit Peak Constant
Envelope Comparative Circuit
Stop Switch
VCC
Chroma Output
Envelope Comparative Output
Side Envelope Detection (III, IV)
Side Envelope Detection (I, II)
.252 (6.4)
.177
(4.5)
.070 (1.78)
.135 (3.43)
.300 (7.62)