Programmable low-voltage continuous-time filter for audio applications

Author

Yúfera, Alberto ; Rueda, Adoración

Author_Institution

Inst. de Microelectron., Seville Univ., Spain

Volume

2

fYear

1999

fDate

36342

Firstpage

200

Abstract

The implementation of a continuous-time filter (CTF) useful for audio frequency applications is presented in this paper. The filter functions can be programmed and tuned with two independent control variables. The filter here proposed has been designed to work at 1.5 V of power supply and at a maximum of 0.5 μA/OTA for the worst case current consumption. Electrical simulations of a Tow-Thomas biquad (TTB) show the possibility of obtaining low-pass and band-pass filter functions over the 10 Hz-40 kHz frequency range by changing a control current over four decades

Keywords

audio equipment; band-pass filters; biquadratic filters; continuous time filters; low-pass filters; low-power electronics; programmable filters; 1.5 V; 10 Hz to 40 kHz; Tow-Thomas biquad; audio applications; band-pass filter; continuous-time filter; control current; filter functions; independent control variables; low-pass filter; programmable low-voltage circuits; Band pass filters; Capacitors; Circuits; Frequency; MOSFETs; Power supplies; Threshold voltage; Transconductance; Transconductors; Tuning;

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.1999.780659

Filename

780659