Title :
A field programmable analog array for CMOS continuous-time OTA-C filter applications
Author :
Pankiewicz, Bogdan ; Wojcikowski, Marek ; Szczepanski, Stanislaw ; Sun, Yichuang
Author_Institution :
Fac. of Electronics, Telecommun. & Informatics, Tech. Univ. Gdansk, Poland
fDate :
2/1/2002 12:00:00 AM
Abstract :
A programmable high-frequency operational transconductance amplifier (OTA) is proposed and analyzed. A general configurable analog block (CAB) is presented, which consists of the proposed programmable OTA, programmable capacitor and MOSFET switches. Using the CABs, the universal tunable and field programmable analog array (FPAA) can be constructed, which can realize many signal-processing functions, including filters. A tuning circuit is also discussed. The proposed OTA has been simulated and fabricated in CMOS technology. The results show that the OTA has the transconductance tunable/programmable in a wide range of 700 times and the -3-dB bandwidth larger than 20 MHz. A universal 5×8 CAB array has been fabricated. The chip has also been configured to realize OTA-C 60-kHz and 500-kHz bandpass filters based on ladder simulation and biquad cascade
Keywords :
CMOS analogue integrated circuits; band-pass filters; circuit tuning; continuous time filters; current mirrors; differential amplifiers; operational amplifiers; programmable filters; 20 MHz; 500 kHz; 60 kHz; MOSFET switches; bandpass filters; biquad cascade; continuous-time OTA-C filter; current mirror; field programmable analog array; fully differential OTA; general configurable analog block; ladder simulation; programmable capacitor; programmable high-frequency OTA; signal-processing functions; tuning circuit; universal tunable array; CMOS technology; Capacitors; Circuit optimization; Field programmable analog arrays; Filters; MOSFET circuits; Operational amplifiers; Switches; Transconductance; Tunable circuits and devices;
Journal_Title :
Solid-State Circuits, IEEE Journal of
