TDA audio amplifier circuits are produced in generally by Philips and SGS-THOMSON. The most used ICs are TDA2030 and TDA2003 for small audio amplifiers kits and TDA7294 for higher power amplifiers. In ...

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By the value of R3 as this resistor to ground sets the offset bias seen by the op-amp hence the gain ... For more about op-amps, see Op-Amps Are Used Widely in Broadcast Circuits Note: The deadline to ...