-10-
F2HT
7-STAGE
LIMITTER
AMPLIFIER 1
7-STAGE
LIMITTER
AMPLIFIER 2
SUPPLY
VCO1
VCO2
5.5MHz (B/G)
5.74MHz (B/G)
INTERCARRIER
VCO
REF
Vp
OPTIONAL STEREO
CHANNEL SEPARATION
ADJUSTMENT
V
AF2
V
AF1
1
15
13 14 12 11
MUTE
10
7
8
9
TDA9821
TDA9821 <DUAL CHANNEL SOUND DEMODULATOR>
DEMODU-
LATOR
DEMO.
17
TDA2546A
REF.
AMP.
AGC
FM
DEMO.
LIMITER
AMP.
1st Sound IF &
Demodulator
LIMITER
AMP.
18
1
2
2nd Sound IF
& FM Demo.
3
14
12
13
11
5
4
6
8
7
10
9
IF
INPUT
Cd
MUTE
OUTPUT
5.5MHz
(5.742MHz)
38.9MHz
5.5MHz
(5.742MHz)
External
FM demodulator
TDA2545A <SIF DEMODULATOR>