VOLTAGE CONTROLLED OSCILLATOR WITH LOW-NOISE CURRENT AND VOLTAGE SOURCES

摘要

This invention relates to a voltage controlled oscillator (VCO), more particularly to a voltage controlled oscillator with low-noise current and voltage sources. The voltage controlled oscillator has a low-noise voltage source by using a low-noise current source through the connection of a mirroring transistor to a path for the low-noise current source. As a voltage divider with a variable resistor is connected to a terminal of the mirroring transistor in the voltage controlled oscillator, the voltage controlled oscillator is able to supply a reference bias voltage to a tuner without the lowering of performance thereof.