Title :
Study of switched capacitor multiplier
Author :
Changyue, Ouyang ; Peng, Chen ; Yizhong, Xie
Author_Institution :
Beijing Univ. of Aeronaut. & Astronaut., China
Abstract :
A method for designing switched-capacitor (SC) four quadrant analogue multiplier (4-QAM) is presented. First the structural parasitic effect involving stray capacitance is discussed and a design standard of nonlinear SC integrated circuits is obtained. Based on this, a novel stray-insensitive SC 4-QAM is designed. Thereupon, two structures of SC 4-QAM circuits are derived: stray-sensitive and stray-insensitive. Then, the effects of various nonideal factors on both SC 4-QAM circuits are analyzed in detail using the general method of time-Z-domain close-form analysis. Fully differential SC 4-QAM with clock feedthrough and operational amplifier offset compensation is presented to minimize and eliminate the influence of nonlinear effects. Finally, static and dynamic parameters of SC 4-QAM are defined and computer-aided analysis on both SC 4-QAMs is carried out
Keywords :
active networks; analogue computer circuits; circuit analysis computing; multiplying circuits; network synthesis; switched capacitor networks; time-domain analysis; computer-aided analysis; design standard; differential type; dynamic parameters; four quadrant analogue multiplier; nonlinear SC integrated circuits; offset compensation; operational amplifier; short channel depletion MOSFET; stray capacitance; stray-insensitive; stray-sensitive; structural parasitic effect; switched capacitor multiplier; time-Z-domain close-form analysis; Capacitors; Clocks; FETs; Filters; Integrated circuit technology; Operational amplifiers; Parasitic capacitance; Prototypes; Quadrature phase shift keying; Switches;
Conference_Titel :
Circuits and Systems, 1991. Conference Proceedings, China., 1991 International Conference on
Conference_Location :
Shenzhen
DOI :
10.1109/CICCAS.1991.184327
