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IF Input
V CC
RF AGC
Output
V CC
RF
AGC
Delay
AGC
Filter
8
Downloaded from
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electronic components distributor
Figure 19. Representative Block Diagram
V CC
AFT
V CC
Switch
25
AFT
Clamp
8
IF
Limiter
Amp
9
13
AGC
Control
Phase
Circuit
15
Shift 90
Gated
AGC
Peak
AGC
Sync
AGC
14
Sep
Discharge
17
Flyback/
Video Input
Horizontal PLL Filter
This device contains 2,641 active transistors.
MC44302A
V CC
AFT
PLL Filter
VCO
Output
(Main VCO Loop)
Coil
12
11
19
20
21
AFT
Amp
VCO
Phase
Detector
90
VCO
Freq
Limiter
Sweep
Doubler
0
90
Video 1
Det
Sound
Q Det
Acquisition
Circuit
Horiz PLL
OSC
16
18
28
Lock Detector/
Filter
(Acquisition Circuit)
Intercarrier
Sound Output
V CC
PAL 2
SECAM
NTSC
V CC
Sound
Quadrature
Coil (FM)
Sound
Sound
AFT Filter/
De–
Peak
Emphasis
White Filter
(FM)
Sound Inputs
(FM)
7
4
26
2
FM
FM IF & Detector
AFT
Switch
Switch
Switch
Switch
1
2
3
4
Control
Logic
Audio
Switch
White
Spot Inv
Mode
Video Invert
Switch
Switch
10
5
6
(Neg)
(Pos)
Video Outputs
PAL 1
Video
Mode
Switch
MOTOROLA ANALOG IC DEVICE DATA
(AM)
23
AM IF &
Detector
Audio Output
24
(Constant)
Vol
Audio Output
27
Control
(Variable)
V CC
Volume
1
Control
Audio Input/
Audio–Video
Switch
3
22
From
External
Audio
Gnd
Source
Audio 1
Audio 2
Video 1
Video 2
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