Title :
A 4th-order bandpass /spl Delta//spl Sigma/ modulator with reduced number of op amps
Author_Institution :
Illinois Univ., Urbana, IL, USA
Abstract :
In this work, a single-sideband modulation technique is applied to implement a 4th-order bandpass /spl Delta//spl Sigma/ modulator using two op amps instead of four. The modulator is in principle a 2-path system, but is designed to have path mismatch and offset effects canceled to a first order.
Keywords :
operational amplifiers; sigma-delta modulation; fourth-order bandpass /spl Delta//spl Sigma/ modulator; offset; op amps; path mismatch; single-sideband modulation; Capacitors; Clocks; Delay; Delta modulation; Frequency; Output feedback; Sampling methods; Switches; Timing; Transfer functions;
Conference_Titel :
Solid-State Circuits Conference, 1995. Digest of Technical Papers. 41st ISSCC, 1995 IEEE International
Conference_Location :
San Francisco, CA, USA
Print_ISBN :
0-7803-2495-1
DOI :
10.1109/ISSCC.1995.535523
