U4468B Datasheet, PDF (7/11 Pages) ATMEL Corporation – Quasi-split Sound Circuit and AM Demodulator IC

U4468B
Figure 3. Test Circuit
Standard B/G
V_S
+5 V
22 µF
SFT 5.74 MA
Rx
14
680 Ω
680 Ω
1
10 nF
270 Ω
500 Ω
10 µF
13
12
11
10
2.2 µF 2.2 µF
9
8
U2860B
2
3
4
5
6
7
SFT 5.5MA
3.3 kΩ
15 nF
3.3 kΩ
15 nF
Intercarrier
frequency
NC
16
Mute Squelch
AF2 AF1
22 µF
V_S
+5 V
NC
15
14
13
10 nF
NC
12
11
S2 Mute
10
9
VCO
(38.9 MHz)
U4468B
L₁
8.2 pF
33.4 38.9
IF
MHz MHz
Standard L
1
2
3
4
5
6
7
8
4.7 µF 4.7 µF 470 nF
150 Ω
S₁ AGC
(Mean/Peak)
AF (AM)
32.4 MHz
7
4777A–TVVCR–01/04