BA7797F Datasheet, PDF (5/8 Pages) Rohm – VCR standard audio signal processor

Video ICs
•^{Measurement circuits}
68k
PB IN
1
REC HEAD SW
REC OUT
680
2
3
4.7k
1.5k
4
REC AMP
EQ
0dB
VCC
5
6
REC / EE
CTRL
7
LINE OUT
8
4.7k
9
~^{V BVRHAC}
100k
V2
V
BA7797F
+ 28dB
LINE
ALC
18
17
16
15
14
ATT
– 8dB
13
12
ATT
– 8dB
11
10
ON: Gvo PB
+
PB OUT
4.7k
47k _22µ
2.2M
4.7µ 4.7k
PB LINE IN
ON: ALC OFF
4.7k
47k
TUNER IN
PB / TU / LINE CTRL
4.7k
LINE IN
47k
MUTE CTRL
Fig.1
SW2
0.1µ
Units: R [Ω]
C [F]
1
PB IN
2
3
REC OUT
100k
1k
e2
0.1µ
REC head switch AC withstanding voltage measurement circuit
Fig. 2
5