DocumentCode :
592941
Title :
High Gain and Wide Dynamic Range Front-end Receiver for Weak Signal Acoustic Detector
Author :
Mao, F. ; Xu, Benwei ; Guo, F.M. ; Wang, Yu Peng ; Bian, H.Y. ; Chu, J.H.
Author_Institution :
Sch. of Inf. Sci. Technol., ECNU, Shanghai, China
fYear :
2012
fDate :
8-10 Dec. 2012
Firstpage :
350
Lastpage :
354
Abstract :
The novel acoustic analog front-end receiver chip basing all-CMOS technology was designed to amplify the weak signal depressed the harmonic distortion and interference of adjacent channels for multi-channel acoustic imaging system. The 48 channel variable gain amplifiers (VGA) with the exponential gain control, multi-channel output data strobe, output buffer and continuous-time and anti-aliasing fourth-order Butterworth low pass filter for high signal-noise-ration (SNR) of analog-to-digital convertor (ADC), and integrated a vertical shift register. By the simulation verification, processing and test, the system shown linearity gain dynamic range 52dB, the equivalent input noise 5.2nV /Hz1/2@ 1.5MHz, and - 3dB bandwidth on 15MHz~92MHz. When the gain was less than 55dB, the second-order harmonic distortion was less than - 40dB, the receiving sensitivity 50μV while signal to noise ration (SNR) 30dB, the power consumption of each channel 6mW at 5V power supply.
Keywords :
Butterworth filters; acoustic noise; acoustic receivers; acoustic signal processing; amplifiers; analogue-digital conversion; gain control; power consumption; all-CMOS technology; analog-to-digital convertor; exponential gain control; fourth-order Butterworth low pass filter; frequency 1.5 MHz; harmonic distortion; linearity gain dynamic; multichannel acoustic imaging system; multichannel output data strobe; novel acoustic analog front-end receiver chip; power consumption; signal-noise-ration; variable gain amplifiers; Dynamic range; Gain; Harmonic distortion; Linearity; Noise; Receivers; Sonar; front-end receiver; harmonic distortion; multi-channel detector; variable gain amplifier; weak signa readoutl;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Instrumentation, Measurement, Computer, Communication and Control (IMCCC), 2012 Second International Conference on
Conference_Location :
Harbin
Print_ISBN :
978-1-4673-5034-1
Type :
conf
DOI :
10.1109/IMCCC.2012.86
Filename :
6428919
Link To Document :
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