Title :
Automatic tuning of frequency and Q-factor of bandpass filters based on envelope detection
Author :
Karsilayan, Aydin Ilker ; Schaumann, Rolf
Author_Institution :
Dept. of Electr. Eng., Portland State Univ., OR, USA
Abstract :
The paper discusses an approach using very simple tuning circuitry based on the envelope detection method. A second-order bandpass filter is used as a demonstration vehicle. The complete tuning circuit consists of frequency and Q-factor tuning blocks, and operates on a 3 V power supply. Due to its simplicity, this method can be used for automatic tuning of high-Q bandpass filters at very high frequencies with very little circuit overhead
Keywords :
Q-factor; active filters; band-pass filters; circuit tuning; 3 V; Q-factor; automatic tuning; circuit overhead; envelope detection; second-order bandpass filter; tuning circuit; Band pass filters; Circuit optimization; Envelope detectors; Frequency; Phase locked loops; Q factor; Transconductors; Tuning; Vehicles; Voltage;
Conference_Titel :
Circuits and Systems, 1998. ISCAS '98. Proceedings of the 1998 IEEE International Symposium on
Conference_Location :
Monterey, CA
Print_ISBN :
0-7803-4455-3
DOI :
10.1109/ISCAS.1998.704178
