An inherently linear and compact MOST-only current-division technique

Author

Bult, K. ; Geelen, G.

Author_Institution

Philips Research Lab., Eindhoven, Netherlands

fYear

1992

fDate

19-21 Feb. 1992

Firstpage

198

Lastpage

199

Abstract

A technique is presented that uses the same MOS transistors for both division and switching functions, eliminating resistors or capacitors. Although an MOS-transistor exhibits a nonlinear relation between the current and voltage (even in the linear region), it is shown that the current division is inherently linear. The most important measurement results are shown. The dynamic range in the audio-band (0-20 kHz) is 103 dB with respect to a maximum input signal of 1 V/sub rms/. At 1 V/sub rms/, THD is below -80 dB over the audio band and below -85 dB under 3 kHz. As the unity-gain frequency of the opamps is 4.5 MHz, the bandwidth of the circuit is limited to 1.5 MHz. Attenuation accuracy is better than 0.15 dB up to -48 dB and better than 0.4 dB over the entire attenuation range.<>

Keywords

MOS integrated circuits; analogue processing circuits; 0 to 20 kHz; 1 V; 1.5 MHz; MOS transistors; MOST-only current-division technique; THD; attenuation range; audio-band; bandwidth; dynamic range; inherently linear technique; linear MOS current division; switching functions; unity-gain frequency; Artificial intelligence; Circuits; Equations; Geometry; MOS capacitors; MOS devices; MOSFETs; Nonlinear distortion; Resistors; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Solid-State Circuits Conference, 1992. Digest of Technical Papers. 39th ISSCC, 1992 IEEE International

Conference_Location

San Francisco, CA, USA

Print_ISBN

0-7803-0573-6

Type

conf

DOI

10.1109/ISSCC.1992.200480

Filename

200480