Motorola Corporation

Karthik Narasimhan

Darrell James Stogner

Richard S Young

Charles H Carter

A method for controlling audio gain balance in a multi-mode communications device () includes providing () microphone audio input to the multimode communications device. The audio is supplied to an amplifier gain stage while a dynamic instantaneous energy value of the audio input is computed () when in a first operational mode such as an analog mode. A predetermined gain algorithm is processed () representing an audio input when in a second mode such as a digital mode using the energy value. The audio gain stage in the multi-mode communications device is then adjusted () so that audio gain when in the first mode substantially approximates an audio gain when in an second mode. This provides a consistent audio amplitude output when receiving the first and second modes in a radio receiver.

Method for controlling multi-mode audio gain balance

A modulator ( ) modulates a plurality of symbols to create a modulated signal. A transmitter is coupled to the modulator ( ). The transmitter transmits the modulated signal if the modulated signal is above a threshold. A minima enlarger ( ) is coupled to the modulator ( ). The minima enlarger ( ) computes an adjustment to the plurality of symbols if the modulated signal is below the threshold. A summer ( ) is coupled to the modulator ( ) and the minima enlarger ( ). The summer ( ) adds the adjustment to the plurality of symbols if the modulated signal is below the threshold.

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Sunrise, FL, United States of America

Karthik Narasimhan