Single OTA Based Dual Mode First-Order All-Pass Analog Network

Operational transconductance amplifier, a resistor and a capacitor are being used in this proposed work to construct a dual mode first-order all-pass analog network. The presented circuit has a distinguishing feature that allows it to operate in both voltage-mode and current-mode. In order to get all-pass filter response in both modes, the circuit does not require any physical alterations. The non-ideal as well as parasitic analyses are also included to evaluate the real time performance of proposed structure. The importance of design has been highlighted by using Monte-Carlo analysis to explore the impacts of capacitor changes as well as the effects of temperature variations. Using ± 1 V power supply and 0.18 μm CMOS process parameters, the theory of the proposed circuit is validated using PSPICE simulation.