TEA6320 Multichannel Audio Selector and Volume Control

High-end audio equipments are normally digitally controlled by a a microprocessor (microcontroller) system. It’s necessary to have  digital interface that provide control for audio signal switching, as well as programming the gain to control the signal volume. TEA6320 comes with the solution for digital control of audio source channel selector and volume control, very useful integrated circuit for modern audio […]

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How Condenser Microphone Works

A condenser microphone is different from dynamic microphone. The condenser microphone, the diaphragm is assembled close to a rigid backplate. This microphone need a battery that is connected to the rigid backplate and the diaphragm to charge or give an electrical potential between the metals. The response of diaphragm to sound is changed since the diaphragm change. The displacement of […]

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How Dynamic Microphone Works

A dynamic microphone is an example of dynamic transducer. The principle of dynamic transducer is a movement of a thin metallic diaphragm because of sound wave. This diaphragm attach coil of wire. Based on Faraday’s electromagnetism law there will current flow caused by the motion of within the field. The motion speed affect the current amount that is produced by […]

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Cuckoo Sound Simulator (Synthesizer/Generator)

A two tone effect very much alike cuckoo sound is generated by this circuit. We can use this circuit for door-bells or other purposes thanks to a built-in audio amplifier and loudspeaker. Used as a sound effect generator, it can be connected to external amplifier, tape recorder, etc. The built-in audio amplifier and loudspeaker may be omitted and the output […]

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BTL Mono Amplifier With DC Volume Control

This is BTL  (bridged tied load) mono amplifier with DC volume Control circuit. This circuit uses TDA7052A/AT that is suitable not only for monitors and TV but also battery fed portable radios and recorders. The difference between conventional DC volume circuits and TDA7052A/AT the DC volume control is there is no coupling capacitor is needed in TDA7052A/AT the DC volume […]

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TL084 Audio Compressor (AGC)

Compressor or AGC (automatic gain control) is used to manipulate the average amplitide of audio signal, to produce relatively constant volume of signal from high dynamic signal source. The 2N3819 JFET (which is used as a voltage controlled resistor) is the key component. Control voltage which is derived by full-wave rectification followed by a peak detector is provided by the […]

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Class G Power Amplifier with LM48824

Class G audio power amplifier uses two (or more) separate voltage supplies with different levels, take the benefit of AB class amplifier when operated its  almost full signal swing.  With two different level of supply voltage, the efficiency is significantly improved while maintaining the best accuracy (low distortion) of linear amplifier. The LM48824 is a Class G, ground-referenced stereo headphone […]

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