VOLTAGE CONTROLLED OSCILLATOR

摘要

A voltage controlled oscillator is provided to obtain a signal with high power without an additional circuit by connecting a transmission line of 1/4 wavelength to a source terminal of an FET for amplifying a buffer and matching the power with the length of a stub for biasing a coupling signal. A voltage controlled oscillator includes an oscillator, an amplifier, and a pair of transmission lines. The amplifier is cross-combined for oscillating a differential signal and is comprised of a pair of FET(2) to amplify the output of the oscillator and an inductor(1). The pair of transmission lines(7) are short-circuited in the source terminal of the FET. The FET of the amplifier connects a drain terminal for amplifying an oscillation frequency. The signal connection line is serially connected to the drain terminal of the FET of the amplifier. The transmission line includes a capacitor with a fixed value.