Title :
Transconductor and integrator circuits for integrated bipolar video frequency filters
Author :
De Heij, W.J.A. ; Seevinck, E. ; Hoen, K.
Author_Institution :
Twente Univ., Enschede, Netherlands
Abstract :
A description is presented of novel transconductor and integrator circuits which can be used in integrated video frequency filters in bipolar technology. The transconductor consists of a parallel connection of a passive nominal transconductance and an active variable transconductance, resulting in good high-frequency performance up to 70 MHz and less than 1% linearity error for input signals up to 2V pp. The integrator incorporates an operation transconductance amplifier circuit which provides a tunable integrator phase. Simulation results for all circuits and for a fifth-order elliptic low-pass filter with a nominal cutoff frequency of 5 MHz are presented
Keywords :
active filters; bipolar integrated circuits; integrating circuits; low-pass filters; 0 to 70 MHz; 2 V; 5 MHz; active variable transconductance; fifth-order elliptic low-pass filter; high-frequency performance; input signals; integrated bipolar video frequency filters; integrator circuits; linearity error; nominal cutoff frequency; operation transconductance amplifier circuit; parallel connection; passive nominal transconductance; simulation results; transconductor circuits; tunable integrator phase; Active circuits; Digital filters; Frequency; Integrated circuit technology; Linearity; Resistors; Transconductance; Transconductors; Tunable circuits and devices; Voltage;
Conference_Titel :
Circuits and Systems, 1989., IEEE International Symposium on
Conference_Location :
Portland, OR
DOI :
10.1109/ISCAS.1989.100304
