Abstract
A new operational transconductance amplifier (OTA) builds with CMOS inverters only is proposed in this paper. Simulations with typical BSIM3V3 parameters of a 0.35 μm CMOS process have shown a 3.56 GHz gain-bandwidth product under 2.5 V supply voltage. The corresponding total harmonic distortion is equal to 0.46% for 2 V peak---peak differential output voltage. At the same supply voltage, the circuit can provided at each output a voltage swing of 2.25 V peak---peak. From VDD = 2 V to VDD = 2.5 V the differential transconductance varies from 72 to 108.4 μ??1. The corresponding common mode rejection ratio and the total power consumption are always lower than ?31 dBc and 800 μW, respectively. Typical application of a biquad filter is proposed to illustrate the circuit capabilities.
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