CXA2094 데이터 시트보기 (PDF) - Sony Semiconductor

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CXA2094

US Audio Multiplexing Decoder

Sony Semiconductor 

CXA2094Q

The variable de-emphasis circuit transmittance and VCA gain are respectively controlled by Each of

effective value detection circuits. Each of the effective value detection circuits passes the input signal

through a predetermined filter for weighting before the effective value of the weighted signal is

detected to provide the control signal.

(6) Matrix, TVSW

The signals (L + R, L – R, SAP) input to “MATRIX” become the outputs for the ST-L, ST-R, MONO and

SAP signals according to the mode control and whether there is ST / SAP discrimination.

“TVSW” switches the “MATRIX” output signal, external input signal (input to AUX1-L, R (Pins 42 and

41)), external input signal (input to AUX2-L, R (Pins 45 and 44)) and external forced MONO.

(7) Others

“MVCA” is a VCA which adjusts the input signal level to the standard level of this IC.

“Bias” supplies the reference voltage and reference current to the other blocks. The current flowing to

the resistor connecting IREF (Pin 15) with GND become the reference current.

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