STV0042 データシートの表示（PDF） - STMicroelectronics

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STV0042

SATELLITE SOUND AND VIDEO PROCESSORS

STMicroelectronics 

STV0042A

AUDIO SWITCHING

AUDIO

K1a

K5b

DEEMPHASIS

+ ANRS

AUDIO PLL

K5c

AUX IN

K1c

K5a

K2

K3

a

ON No ANRS, No De-emphasis

b1

ON No ANRS, 50µs

b2

ON No ANRS, 75µs

a

OFF ANRS, No De-emphasis

b1

OFF ANRS, 50µs

b2

OFF ANRS, 75µs

VOL OUT AUX OUT

FM DEMODULATION BLOCK DIAGRAM

FM IN

AGC

AGC R

AMPLK R

SW1

Phase

Detect

LEVEL

DETECTOR 1 Bias

LEVEL

DETECTOR 2

Amp. Detect

VREF

Reg8 b4

WATCHDOG

AGC

AGC L

AMPLK L

SW3

Phase

Detect

LEVEL

DETECTOR 1 Bias

LEVEL

DETECTOR 2

Amp. Detect

VREF

Reg8 b0

WATCHDOG

FM dev.

Select.

VREF

DET R

AUDIO R

CPUMP R

90

VCO

0

SYNTHESIZER

AUDIO L

SW2

SW4

DET L

FM dev.

Select.

VREF

90

VCO

0

CPUMP L

STV0042A

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