Title :
Programmable low-voltage continuous-time filter for audio applications
Author :
Yúfera, Alberto ; Rueda, Adoración
Author_Institution :
Inst. de Microelectron., Seville Univ., Spain
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;
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
DOI :
10.1109/ISCAS.1999.780659
