0.5-V fully differential allpass section

This paper presents a new first-order allpass filter using bulk-driven transconductor which is suitable for biological signal processing applications. The proposed filter employs one transconductor, one resistor and two capacitors. The bulk-driven MOS transistor technique is used to provide 0.5 V supply voltage operation. The workability of the proposed topology is expressed through PSPICE simulators using TSMC 0.18 µm n-well CMOS process. Simulation results show that the circuit consumes the power of 11.7 µW and has total harmonic distortion (THD) of 1% for input signal of 30 mVP-P.