Title: Voltage control oscillator
Application Number: 200510055954 Application Date: 2005.03.21
Publication Number: 1671038 Publication Date: 2005.09.21
Approval Pub. Date: Granted Pub. Date:
International Classifi-cation: H03B5/12,H01L29/00
Applicant(s) Name: NEC Electronics Corp. Address:
Inventor(s) Name:
Attorney & Agent: zhu jingui
Abstract:
     An LC circuit including an inductor and a pair of varactor elements is provided in an LC-VCO. This LC circuit outputs complementary alternating current signals from a pair of output terminals. The varactor element is formed by providing a gate electrode on an N well. Then, the well terminals of the varactor elements are connected to the respective output terminals, and the gate terminals of the varactor elements are connected to a control terminal. Thereby, as a control voltage to be applied to the control terminal becomes higher, the capacitance of the varactor element increases, and the frequency of the alternating current signal lowers.
Time: 9