Title :
A low-noise transistor microphone amplifier
Author :
Mcwhorter, M.M. ; Warner, G.S.
Author_Institution :
Vidar Corporation, Mountain View, CA, USA
fDate :
3/1/1966 12:00:00 AM
Abstract :
A microphone amplifier is described which possesses good noise characteristics at all gain settings and the capability of handling large input signals without appreciable distortion at low gain settings. A single potentiometer is used as the gain control to 1) vary the negative feedback to provide high overload capability at low gain, and 2) attenuate the output to provide a minimum gain of zero. The circuit is developed from a two-transistor building block.
Keywords :
Acoustic noise; Circuits; Feedback; Low-noise amplifiers; Microphones; Noise level; Noise reduction; Performance gain; Potentiometers; Signal to noise ratio;
Journal_Title :
Audio and Electroacoustics, IEEE Transactions on
DOI :
10.1109/TAU.1966.1161839
