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In this paper, a new high-performance Class AB operational transconductance amplifier circuit is introduced. Based on flipped voltage follower technique, the proposed OTA showed a high DC gain of 41.33 dB with a unity gain frequency at 14 MHz, a wide dynamic range, a total harmonic distortion of −42.61 dB at 100 kHz and occupies only 28.64 x 20.61 µm 2  chip area. Thereafter, a new single-input-multi-output (SIMO) transadmittance mode filter possessed by three multi-output OTAs and two capacitors is realised. The proposed filter can be achieved by all the standard filter functions without changing the circuit topology. The post-layout simulation results of the proposed OTA and biquadratic filter have been implemented with Cadence Virtuoso in TS18SL 0.18 µm technology Tower Jazz.

Realisation of low voltage low power class AB OTA and its application in biquadratic filter