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Enhanced Audio Scrambler and Sub-Audio Signaling Processor IC

Fri, 08/27/2010 - 8:34am
CML Microcircuits has announced the launch of a new Audio Scrambler and Sub-audio Signaling Processor to its family of analogue two-way radio ICs. The CMX138A, an upgrade based on the hugely successful CMX138 IC, is intended for use in half duplex analogue two-way radios or family radio equipment, particularly suited to enhanced MURS, GMRS, PMR446 and FRS designs.

Highly integrated by design, the device provides a user programmable frequency inversion audio scrambler with signal processing functions, CTCSS, DCS and in-band tones, allowing comprehensive voice processing and tone control. Key enhancements for the CMX138A include:

•Improved limiter functions

•Enhanced CTCSS and DCS performance

•A new input Automatic Gain Control (AGC) function

•In-band tone operation enabled down to 288Hz

•Improved audio compandor which enhances the performance of compressed signals.

These developments are designed to provide even greater levels of tone control and voice processing, making the CMX138A the complete audio solution.

The CMX138A is available in a small, low-power (3.0V to 3.6V with flexible powersave modes), 28-pin (E1) TSSOP package.

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