Invention Grant
- Patent Title: Symmetrical linear voltage controlled oscillator
- Patent Title (中): 对称线性压控振荡器
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Application No.: US11048456Application Date: 2005-01-31
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Publication No.: US07209017B2Publication Date: 2007-04-24
- Inventor: Bour-Yi Sze , Chih-Long Ho , Ming-Chieh Huang
- Applicant: Bour-Yi Sze , Chih-Long Ho , Ming-Chieh Huang
- Applicant Address: TW Taipei
- Assignee: VIA Technologies, Inc.
- Current Assignee: VIA Technologies, Inc.
- Current Assignee Address: TW Taipei
- Agency: Kirkpatrick & Lockhart Preston Gates Ellis LLP
- Main IPC: H03B5/12
- IPC: H03B5/12

Abstract:
A system is provided to improve frequency stability and system linearity in voltage controlled oscillators. A symmetrical voltage controlled oscillator system embodying the present invention comprises a frequency tuning circuit for receiving a frequency tuning signal, a band tuning circuit coupled with the frequency tuning circuit in a parallel fashion having at least one switching circuit for receiving at least one band tuning signal and at least one switching signal, a core circuit coupled with the frequency tuning circuit and the band tuning circuit for providing a first output and a second output that are complementary to each other, wherein upon asserting the switching signal, and upon adjusting the frequency tuning signal and the band tuning signal, the switching circuit is enabled for configuring the band tuning circuit to join the frequency tuning circuit for determining a predetermined output frequency based on a total inductance and total capacitance provided by the core circuit, the frequency tuning circuit and the band tuning circuit.
Public/Granted literature
- US20060028283A1 Symmetrical linear voltage controlled oscillator Public/Granted day:2006-02-09
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