M52342SP 데이터 시트보기 (PDF) - MITSUBISHI ELECTRIC

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M52342SP

PLL-SPLIT VIF/SIF IC

MITSUBISHI ELECTRIC  

MITSUBISHI ICs (TV)

M52342SP

PLL-SPLIT VIF/SIF IC

FM DET

11

limiter input

VCO

5kΩ

+

5kΩ

-

9

F/B Filter

10

Audio output

The input intercarrier signal from pin 11 is applied to the FM detector after amplifying in the limiting amplifiers.

A quadrature demodulation is done between a VCO output generated internally and an intercarrier signal, and then the detector output is

returned to the VCO through the LPF.

These functional blocks, the FM detector, LPF and VCO, form the PLL circuit so that the VCO frequency is locked to the intercarrier signal.

The LPF output is available in pin 10 after passing through the AF amplifier.

14

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