Efficient synthesis of OTA network for linear analog functions
This paper reports a general methodology and a computer-aided design (CAD) tool (BECAS 1.0) for synthesis of linear analog functions with a network of operational transconductance amplifiers (OTAs). Efficient analog circuits have been synthesized with the CAD tool and reported along with the simulation results. SPICE simulated results of the synthesized circuit match closely with those derived theoretically from the input transfer function. A first-order low-pass filter employing a minimum number of OTAs is used in the design as the basic building block. The number of OTAs employed to realize an analog function can be minimized in the optimization phase of the synthesis algorithm.
operational transconductance amplifier (ota) low-pass filter all-pass filter band-pass filter biquadratic filter high-pass filter