TDA7403D View Datasheet(PDF) - STMicroelectronics

Part Name

Description

Manufacturer

TDA7403D

BASIC SIGNAL PROCESSOR

STMicroelectronics 

TDA7403

Figure 10. Trigger Threshold vs. VPEAK

VTH

MIN. TRIG. THRESHOLD

8 STEPS

65mV

30mV

0.9V

D97AU648

260mV(00)

220mV(01)

180mV(10)

140mV(11)

NOISE CONTROLLED

TRIG. THRESHOLD

1.5V

VPEAK(V)

Figure 11. Deviation Controlled Trigger Ad-

justment

Figure 12. Fieldstrength Controlled Trigger

Adjustment

VPEAK

(VOP)

00

2.8

01

2.0

10

1.2

0.9

DETECTOR OFF (11)

D97AU649

20 32.5

45

75

DEVIATION(KHz)

VPEAK

»3V

MONO

STEREO

NOISE

2.3V(00)

1.8V(01)

1.3V(10)

ATC_SB OFF (11)

noisy signal

D98AU863

good signal

0.9V

E'

Figure 13. Block diagram of the stereo decoder

MPX

100K

INGAIN

3.5 ... 11dB

STEP 2.5dB

D98AU952

INFILTER

LP 80KHz

4.th ORDER

PLL +

PILOT-DET.

F19

F38

STEREO

NOISE BLANKER

HOLDN

DEMODULATOR

- PLOT CANC

- ROLL-OFF COMP.

- LP 25KHz

DEEMPHASIS

+ HIGHCUT

t=50 or 75µs

FM_L

FM_R

SB CONTROL

REF 5V

VSBL

HC

CONTROL

D

A

VHCCH

VHCCL

LEVEL INTERN

LEVEL INPUT

LP 2.2KHZ

1.th ORDER

GAIN 0..10dB

LEVEL

12/25

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