A TUNABLE DISTRIBUTED VOLTAGE CONTROLLED OSCILLATOR FOR GENERATING HIGH FREQUENCY MICROWAVE SIGNALS

摘要

This invention relates to a tunable distributed voltage controlled oscillator for generating high frequency microwave signals.According to the invention there is provided a tunable distributed voltage controlled oscillator for generating high frequency microwave signals, the oscillator comprising a plurality of stages of complimentary metal oxide semiconductor (CMOS) inverters in parallel configuration, each of the inverters comprising a p-metal oxide semiconductor field effect transistor (MOSFET) at the top and a n-metal oxide semiconductor field effect transistor (MOSFET) at the bottom with their gates connected to a supply voltage and to a gate transmission line and their drains connected to the supply voltage and to a drain transmission line, the drain transmission line and the gate transmission line being connected to each other through a feed back path, the drain transmission line and the gate transmission line each comprising a plurality of coplanar wave guides in series, the number of coplanar wave guide in each of the gate and drain transmission lines being greater than the number of stages of CMOS inverters by a factor of 1, the body of the p-MOSFET being inwardly directed and connected to a forward body bias voltage and the source of the p-MOSFET being connected to the supply voltage and the body of the n-MOSFET being outwardly directed and the body and source of the n-MOSFET being earthed, the gate transmission line further comprising a frequency collector.