Title :
Log-domain circuits in subthreshold MOS
Author :
Himmelbauer, Wolfgang ; Andreou, Andreas G.
Author_Institution :
Dept. of Electr. & Comput. Eng., Johns Hopkins Univ., Baltimore, MD, USA
Abstract :
This paper considers compact, large signal linear, log-domain circuits that exploit the translinear characteristics of MOS transistors in weak inversion for low power applications in the audio frequency range. We synthesize a single pole log-domain lowpass filter from its state space description and extend the circuit topology to implement a two pole bandpass. Experimental results from a custom fabricated 2 μm CMOS chip are presented that confirm circuit functionality and tunability
Keywords :
CMOS analogue integrated circuits; active filters; integrated circuit design; linear network synthesis; low-pass filters; state-space methods; 2 micron; CMOS chip; MOS transistors; audio frequency range; large signal linear circuits; log-domain circuits; low power applications; single pole lowpass filter; state space description; subthreshold MOS; translinear characteristics; tunability; two pole bandpass filter; weak inversion; Band pass filters; Circuit synthesis; Circuit topology; Frequency; Linear systems; Nonlinear filters; Signal processing; Signal synthesis; State-space methods; Voltage;
Conference_Titel :
Circuits and Systems, 1997. Proceedings of the 40th Midwest Symposium on
Conference_Location :
Sacramento, CA
Print_ISBN :
0-7803-3694-1
DOI :
10.1109/MWSCAS.1997.666025
