Title :
A monolithic 2-b delta-sigma A/D converter
Author :
Del Signore, B.P. ; Kerth, Donald A. ; Sooch, Navdeep S. ; Swanson, Eric J.
Author_Institution :
Crystal Semicond. Corp., Austin, TX, USA
fDate :
12/1/1990 12:00:00 AM
Abstract :
A monolithic 20-b analog-to-digital (A/D) converter using oversampling techniques which is implemented in standard 3-μm CMOS technology is described. The integrated circuit contains a fourth-order delta-sigma modulator and a digital finite-impulse-response filter and decimator. The modulator consists of a continuous-time chopper-stabilized front end, and a switched-capacitor loop filter and comparator. The dynamic range is 123 dB over a DC-to-500-Hz bandwidth, and the signal-to-noise-harmonic-distortion ratio is 126 dB. The chip consumes 125 mW power and has an area of 29.25 mm2
Keywords :
CMOS integrated circuits; analogue-digital conversion; delta modulation; digital filters; switched capacitor filters; 0 to 500 Hz; 125 mW; 3 micron; CMOS technology; continuous-time chopper-stabilized front end; decimator; delta-sigma A/D converter; digital finite-impulse-response filter; dynamic range; oversampling techniques; signal-to-noise-harmonic-distortion ratio; switched-capacitor loop filter; Capacitors; Choppers; Circuit noise; Digital filters; Dynamic range; Feedback circuits; Filtering; Finite impulse response filter; Frequency; Sampling methods;
Journal_Title :
Solid-State Circuits, IEEE Journal of
