CXA2510AQ データシートの表示（PDF） - Sony Semiconductor

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CXA2510AQ

Dolby∗ B Type Noise Reduction System with Playback Equalizer Amplifier

Sony Semiconductor 

CXA2510AQ

5. Operating mode control method

The CXA2510AQ has a Dolby NR switch (NRSW), playback equalizer amplifier select switch (TAPESW), head

input select switch (DRSW), music sensor mode select switch (MSMODE) and music sensor switch (MSSW).

The operating modes for each switch are shown in the following table.

Pin No.

Pin name

16 NRSW

17 INSW

18 TAPESW

19 DRSW

20 MSMODE

21 MSSW

Pin voltage

Low (OPEN)

Dolby NR OFF

TAPE

120µs

PBIN FORWARD

G1

MS ON

High

Dolby NR ON

AUX

70µs

PBIN REVERSE

G2

MS OFF

Notes on Operation

1. Dolby NR

Dolby NR functions by using the current that flows into DIREF (Pin 25) as standard.

The Dolby NR attack/recovery time is determined by the capacitance connected to TCH (Pins 8 and 23).

Use the parts connected to these pins with high accuracy and small temperature characteristics.

(It is recommended that the resistance tolerance of 2% <metal-oxide> and capacitance tolerance of 10%

<film>.)

2. Playback equalizer amplifier

All playback equalizer amplifier characteristics are determined by the external constants. Use the parts

which satisfies the accuracy required for the playback equalizer amplifier.

3. Music sensor

The current on DIREF (Pin 25), and the resistance and capacitance connected to G2FB (Pin 10) and G1FB

(Pin 11) determine the detection level and the HPF cut-off frequency.

The response time is determined by the resistance and capacitance connected to MSTC (Pin 12).

Use the parts which satisfies the accuracy required for the music sensor.

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