Title: Symmetrical voltage controlled oscillator
Application Number: 200510077044 Application Date: 2005.06.15
Publication Number: 1694347 Publication Date: 2005.11.09
Approval Pub. Date: Granted Pub. Date:
International Classifi-cation: H03B1/04;H03B5/12
Applicant(s) Name: VIA Tech Inc. Address:
Inventor(s) Name: He Zhilong;Shi Boyi;Zheng Nianzu
Attorney & Agent: shou ning zhang huahui
Abstract:
    A VCO system embodying the features of the present invention includes a frequency tuning circuit, a modulation circuit coupled in a parallel fashion with the frequency tuning circuit, a band tuning circuit coupled with the frequency tuning circuit in a parallel fashion having at least one switching circuit, a core circuit coupled with the frequency tuning circuit, the modulation circuit, and the band tuning circuit, wherein upon asserting a switching signal and upon adjusting a frequency turning signal, a frequency tuning bias signal, and a band tuning signal, the switching circuit is enabled for configuring the band tuning circuit to join the frequency tuning circuit for adjusting a predetermined output frequency based on a total inductance and a total capacitance provided by the core circuit, the frequency tuning circuit, the modulation circuit and the band tuning circuit.
Time: 14