MM1077 データシートの表示（PDF） - Mitsumi

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MM1077

Compander IC

Mitsumi 

MITSUMI

Compander IC MM1077

4. Compressor data amp

The data amp uses an inverting amp. The internal input resistance is 100kΩ, and the DC bias voltage is

1.3V. The compressor mute switch at pin 15 is used to switch between data signals and audio signals.

5. Expander input amp

The positive and negative input pins and the output pin are exposed to circuitry outside the IC. The

expander input amp can be used as a signal amplifier, a buffer amplifier, and a filter amp. By taking the

signal from this amp's output pin, the data signal can be obtained without passing through the expander. If

the expander mute switch is turned on, this signal can be prevented from appearing in the expander output.

6. Mike amp input switch and mute switches

The internal equivalent circuit for each of these switches appears in Fig. 6.

7. Standby switch

The internal equivalent circuit for the standby switch appears in Fig. 7.

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