Patent ID: 6137371
Filing Date: 2000-10-24
Classification: H03K

Abstract:
A voltage controlled oscillator including an odd number of inverter circuits connected in a ring shape, at least one of said inverter circuits comprising:an inverter, connected to a pre-stage one of said inverter circuits at a pre-stage of said at least one of said inverter circuits, for receiving an output signal of said pre-stage inverter circuit to generate an inverted signal;a current control circuit, connected to said inverter, for supplying a current in accordance with the inverted signal to a post-stage one of said inverter circuits at a post-stage of said at least one of said inverter circuits, said current being controlled by an input voltage; anda voltage control circuit, connected between said pre-stage inverter circuit and said post-stage inverter circuit, for charging and discharging an input capacitance of said post-stage inverter circuit in accordance with the output signal of said pre-stage inverter circuit.