DocumentCode :
342412
Title :
Bulk compensated CMOS squaring circuits
Author :
Chan, P.K. ; Ng, L.S. ; Siek, L. ; Tse, M.S. ; Ong, J.Y. ; Lok, K.S.
Author_Institution :
Sch. of Electr. & Electron. Eng., Nanyang Technol. Inst., Singapore
Volume :
2
fYear :
1999
fDate :
36342
Firstpage :
248
Abstract :
This paper presents the new circuit topologies of single-ended and differential CMOS squarer circuits, which rely on transistors operating in non-saturation region. It exploits the bulk compensation technique to eliminate the gamma-dependent constant in the gain definition equation, hence reducing the gain and circuit sensitivity due to process variations. Second-order analysis on the circuits demonstrates that the dominant non-ideal effects are due to mobility degradation and mismatch in devices. The theoretical prediction correlates very well with the measurement results. The experiment shows that the squarer circuit performs a good squaring function. For differential test input signal with 500 mVpp at 1 kHz, the fundamental and odd harmonics are less than 50 dB relative to the squared signal
Keywords :
CMOS analogue integrated circuits; analogue processing circuits; carrier mobility; compensation; nonlinear network analysis; CMOS squaring circuits; bulk compensated squaring circuits; bulk compensation technique; circuit sensitivity reduction; device mismatch; differential squarer circuits; gain definition equation; gain sensitivity reduction; gamma-dependent constant elimination; mobility degradation; nonideal effects; nonsaturation region operation; process variations; second-order analysis; single-ended squarer circuits; Circuit analysis; Circuit topology; Equations; MOSFETs; Network topology; Resistors; Signal generators; Signal processing; Threshold voltage; Transconductance;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Circuits and Systems, 1999. ISCAS '99. Proceedings of the 1999 IEEE International Symposium on
Conference_Location :
Orlando, FL
Print_ISBN :
0-7803-5471-0
Type :
conf
DOI :
10.1109/ISCAS.1999.780686
Filename :
780686
Link To Document :
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