Dual-Mode Microphone Pre-Amplifier Schematic Diagram

  
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This is a microphone pre-amp which I designed intended for function with a SoundBlaster(TM) AWE 64 charge sound license; but it be supposed to exist apt for one compatible tag otherwise PC audio input which provides a 5 Volt supply (via a 2k2, or else thereabouts, built-taking part in current-limiting resistor) by the side of the ring call of a st
Dual-Mode Microphone Pre-Amplifier Schematic Diagram - schematic

ereo jack plug inserted into the "Mic In" socket of the license/PC. (N. b. it has lone been tested with the AWE 64 certificate. ) (1) It wish without human intervention detect whether a mike plugged into it is of the electret (condenser) otherwise dynamic type and will switch sandwiched between respective "low-addition" and "far above the ground-gain" modes accordingly. The van-detection relies on help of a stereo plug fitted to an electret mike and use of a mono plug fitted to a dynamic mike. (5) The gain is sufficient to award something like 60mV summit-to-peak next to the "Mic In" socket, obligatory for complete recording level at home WaveStudio. (6) In conjunction with the license`s built-in input amplifier, the circuit provides a lifeless frequency response done the audio range, with -3dB points on < 10 Hz and 19 kHz. horizontal pre-set. C1 = 47uF; C2 = C3 = C4 = 10uF (all 10V or greater, miniature radial electrolytics). Tr1 = Tr2 = Tr3 = Tr4 = Tr5 = BC108, BC184, BC547, ZTX337 or similar low-power (preferably low noise) NPN transistor You are reading the Circuits of Dual-Mode Microphone Pre-Amplifier And this circuit permalink url it is



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