Stereo Digital Volume Control

It’s good to use CS3310 because CS330 is a complete stereo digital volume control designed specifically for audio systems. This device has features like 16 but serial interface that controls two independent, low distortion audio channels. An array of well-matched resistors and a low noise active output stage that is capable of driving a 600 Ohm load is included in […]

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Basic Vox Circuit Controls PTT

They were missing a VOX if we are take a look at some of the budget priced HF transceiver. It would certainly be nice to have VOX capability although most of these budget priced transceivers performed admirably. The figure below show us a basic VOX circuit which will perform very well once the VOX level is set correctly. This is […]

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Audio Amplifier with DC Volume Control

The TDA7052B and TDA7052BT are 0.5 W and 1 W mono Bridge-Tied Load (BTL) output amplifiers with DC volume control. Not only have been designed for use in TV and monitors, but TDA7052B and TDA7052BT are also suitable for use in battery-fed portable recorders and radios. This devices are integrated with a Missing Current Limiter (MCL). When the difference in […]

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LM1894: Single Chip Dynamic Noise Reduction System (DNR)

The LM1894 is a stereo noise reduction circuit suitable for audio playback application. The DNR system is non-complementary, meaning that it does not require encoded source signal. The system is compatible with almost all prerecorded tapes and FM broadcasts. This noise reduction system uses  psycho-acoustic masking and an adaptive bandwidth filtering to achieve 10 dB noise reduction.  This DNR would […]

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