NJW1124 Ver la hoja de datos (PDF) - Japan Radio Corporation

Número de pieza

componentes Descripción

Lista de partido

NJW1124

Voice Switched Speakerphone circuit

Japan Radio Corporation  

NJW1124

6.Monitor Terminal

Monitor Terminal switches Voltage mode depending NJW1124 condition.

NJW1124 condition : Monitor Terminal Voltage

Receive mode

V+

Transmit mode

GND

Idle mode

Hi-Z or (V+/2)

7.Level Detector Block

The NJW1124 includes Level Detector Block and Background Noise Monitor on transmit block and receive block.

Level Detector Block consists of two same detectors.

Fig.7 shows Level Detector block.

The signal(S1 to S4) output each detector transmits to attenuator controller to change the mode.

Next 7.1 and 7.2 explain about each detector and Background Noise Monitor operation details.

About S1 to S4 signals, refer to 8 part.,

Tx : TLO2

Rx : RLO1

Tx : TLI2

Rx : RLI1

Level

Detector

Circuit

Background

Noise

Monitor

Tx : S3

Rx : S4

Tx : RLI2

Rx : TLI1

Level

Detector

Circuit

Tx : S1

Rx : S2

Tx:RLO2

Rx:TLO1

Fig.7 Level Detector Block

– 18 –

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