Reduction of coupling capacitance, using a capacitor-transistor coupling circuit

In this paper, a new coupling circuit is presented. This circuit uses a new method of subthreshold region biasing to decrease the value of coupling capacitor. In proposed circuit the Coupling capacitor is decreased about 98% in comparison with the ordinary capacitive coupling circuit. In addition, the proposed coupling circuit achieves higher linearity. The performance evaluation of proposed circuit is carried out using HSPICE simulations, 180nm technology and 1.8V power supply.