Transconouctor and Integrator Circuits for Integrated Bipolar Video Frequency Filters
نویسندگان
چکیده
This paper describes novel transconductor and an 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 2Vpp. In the integrator an operational transconductance amplifier circuit is used which provides tunable integrator phase. Simulation results of all circuits and of a fifth order elliptic lowpass filter with a nominal cutoff frequency of 5 MHz are presented.
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