Title :
Design techniques for low-voltage VHF BiCMOS Gm-C filters with automatic tuning
Author :
Lee, Tsung-Sum ; Liu, Chun-Chieh
Author_Institution :
Dept. of Electron. Eng., Nat. Yunlin Univ. of Sci. & Technol., Taiwan
fDate :
6/21/1905 12:00:00 AM
Abstract :
A third-order Chebyshev low-pass filter with automatic tuning based on new BiCMOS low-voltage triode transconductors for applications in the very-high-frequency (VHF) range is presented. Simulation results of the filter and the automatic tuning circuitry are described. The complete system operates with supply voltages of ±1.5 V. The filter achieves a 42.8 MHz cutoff frequency. The filter total harmonic distortion (THD) stays lower than 1% for an input signal up to 1.061 V pp at 8 MHz frequency. The dynamic range of the filter is 60 dB
Keywords :
BiCMOS integrated circuits; Chebyshev filters; VHF circuits; VHF filters; active filters; circuit tuning; harmonic distortion; integrated circuit design; low-pass filters; mixed analogue-digital integrated circuits; -1.5 V; 1.5 V; 42.8 MHz; ASIC; Chebyshev low-pass filter; THD; VHF BiCMOS Gm-C filters; automatic tuning; design techniques; low-voltage Gm-C filters; low-voltage triode transconductors; third-order low-pass filter; total harmonic distortion; BiCMOS integrated circuits; Chebyshev approximation; Circuit optimization; Circuit simulation; Cutoff frequency; Low pass filters; Transconductors; Tuning; VHF circuits; Voltage;
Conference_Titel :
ASICs, 1999. AP-ASIC '99. The First IEEE Asia Pacific Conference on
Conference_Location :
Seoul
Print_ISBN :
0-7803-5705-1
DOI :
10.1109/APASIC.1999.824029
