Title :
A CMOS preamplifier for electret microphones
Author :
Silva-Martínez, José ; Alcedo-Suner, J.
Author_Institution :
Inst. Nacional de Astrofisica, Opt. y Electron., Puebla, Mexico
fDate :
30 Apr-3 May 1995
Abstract :
In this paper a CMOS preamplifier for capacitive sources is presented. The 20 dB gain preamplifier achieves a dynamic range of 54 dB while the total harmonic distortion is below -50 dB. Monte Carlo analyses have shown output random offset voltages below 40 mvolts. The power consumption of the proposed preamplifier is 24 μwatts. All this has been achieved due to the use of a novel resistor and linearized OTAs
Keywords :
CMOS analogue integrated circuits; Monte Carlo methods; audio-frequency amplifiers; electrets; microphones; preamplifiers; 20 dB; 24 muW; 40 mV; CMOS preamplifier; Monte Carlo analyses; capacitive sources; dynamic range; electret microphones; harmonic distortion; linearized OTAs; output random offset voltages; power consumption; resistor; Dynamic range; Electrets; Energy consumption; Gain; Microphones; Monte Carlo methods; Preamplifiers; Resistors; Total harmonic distortion; Voltage;
Conference_Titel :
Circuits and Systems, 1995. ISCAS '95., 1995 IEEE International Symposium on
Conference_Location :
Seattle, WA
Print_ISBN :
0-7803-2570-2
DOI :
10.1109/ISCAS.1995.523781
