U4065B Datasheet, PDF (2/34 Pages) TEMIC Semiconductors – FM Receiver

Figure 1. Block Diagram
ANT
RF tank
PIN
ATT
V_S
IF tank
19 18
16
14
Mixer
IF BPF
IF gain adjust
IF BPF
20
21 4 7
IF 1
V_S
5
3
IF output
IF BPF
2
IF 2
RF tank
V_TUNE
RF
NC ₁₂
Interference
mixer
LO tank
23
Local
24 ^oscillator
AGC
wide band
and IF
IF and
detector
22 1
LO output
11
9
Interference
IF BPF
8
10
13
AGC adjust
(wide band)
Voltage
17
regulator
6
+
V_S
V_REF = 4 V
V_S
AGC level
2 U4065B
4807A–AUDR–05/04