0195136047.pdf

708 COMMUNICATION SYSTEMS

RF

amplifier

Mixer

BPF

2.0–4.2 MHz

LPF

LPF

Trap VCO

4.2 MHz

LPF

Matrix

Audio loud speaker

Picturetube

sQ

(t)

fY

(t)

sI

(t)

RG B

0–1.6 MHz

LPF

0–0.6 MHz

3.6 MHz

Aural IF

FM demodulator

4.5 MHz

Gain adjust

(color)

Antenna

IF

amplifier

Envelopdetector

Color-burst

gate

Horizontaloscillator

Phase-shift

adjust

Hue (tint) control

Color-burst PLL

Verticaloscillator

Sweep tovertical yoke

Sweep tohorizontal yoke

Sync

separator

Local

oscillator

Frequencytuning

IF passband41–47 MHz

π 2

−

Figure 15.2.30

Block diagram of a color television receiver.