HT34118A circuit equivalent, voice switched speakerphone circuit.
of a featurephone.
PIN ASSIGNMENT
* Improved Attenuator Gain Range: 52 dB Between Transmit and Receive
* Low Voltage Operation for Line-Powered Applications (3..
(3.06.5 V)
* 4 Point Signal Sensing for Improved Sensitivity
* Background Noise Monitors for Both Transmit and R.
INTRODUCTION
The fundamental difference between the operation of a speakerphone and a handset is that of half-duplex versus full-duplex. The handset is full duplex since conversation can occur in both directions (transmit and receive) simultaneousiy.
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