NON-QUASISTATIC RECTIFIER CIRCUIT

摘要

A non-quasistsic MOS rectifier circuit (530) uses a bridge-rectifier configuration using four organic PMOS transistors (Ml, M2, M3 and M4), an antenna coil (532) to induce a differential input signal, and an output capacitor (534) for filtering the rectified output signal. The VSS or ground-connected transistors are diode-connected with the gate connection on the coil side of the transistor channel. The VDD-connected transistors have gates connected to the opposing VDD-connected transistor source that is connected to the coil (532). This configuration results in full-wave rectification. The gates are all connected to the coil and thereby become part of of the capacitance of the radio frequency parallel resonant network. The transistor gates are then switched at the rate of the radio frequency signal with no delay relative to the coil voltage, Operation of the organic transistors is based on non-quasistatic behavior of the transistor. Non-quasistatic operation results in rectification at a frequenct much higher than the quasistatic limit of transistor unity gain bandwidth.