Title :
Design techniques for low-voltage VHF BiCMOS transconductance-filters with automatic tuning
Author :
Lee, TsZmg-Sum ; Liu, Chun-Chien
Author_Institution :
Dept. of Electron. Eng., Nat. Yunliu Univ. of Sci. & Technol., Taiwan
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 analogue integrated circuits; Chebyshev filters; Q-factor; VHF filters; active filters; circuit tuning; harmonic distortion; integrated circuit design; low-pass filters; -1.5 V; 0.8 micron; 1.5 V; 42.8 MHz; Chebyshev low-pass filter; LV VHF BiCMOS filters; Q-tuning circuit; automatic tuning; design techniques; filter THD; low-voltage transconductance-filters; third-order low-pass filter; total harmonic distortion; triode transconductors; BiCMOS integrated circuits; Chebyshev approximation; Circuit optimization; Circuit simulation; Cutoff frequency; Low pass filters; Transconductors; Tuning; VHF circuits; Voltage;
Conference_Titel :
Circuits and Systems, 2000. Proceedings. ISCAS 2000 Geneva. The 2000 IEEE International Symposium on
Conference_Location :
Geneva
Print_ISBN :
0-7803-5482-6
DOI :
10.1109/ISCAS.2000.856400
