发明授权
- 专利标题: Phase lock loop (PLL) with gain control
- 专利标题(中): 具有增益控制的锁相环(PLL)
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申请号: US12127651申请日: 2008-05-27
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公开(公告)号: US07786771B2公开(公告)日: 2010-08-31
- 发明人: Tsung-Hsien Tsai , Tsung-Yang Hung , Chien-Hung Chen , Min-Shueh Yuan
- 申请人: Tsung-Hsien Tsai , Tsung-Yang Hung , Chien-Hung Chen , Min-Shueh Yuan
- 申请人地址: TW Hsin-Chu
- 专利权人: Taiwan Semiconductor Manufacturing Company, Ltd.
- 当前专利权人: Taiwan Semiconductor Manufacturing Company, Ltd.
- 当前专利权人地址: TW Hsin-Chu
- 代理机构: Slater & Matsil, L.L.P.
- 主分类号: H03L7/06
- IPC分类号: H03L7/06
摘要:
A Phase Lock Loop (PLL) with gain control is provided. The PLL has a dual-path configuration, where a first and a second VCO control voltage are generated in response to a phase or frequency difference between a PLL input signal and an output signal. The PLL comprises a dynamic voltage gain control (DVGC) unit and a voltage-to-current (V2I) unit, where the DVGC creates a baseline reference current in response to the first VCO control voltage and the V2I provides a substantially linear current in response to the second VCO control voltage. The currents from the DVGC and V2I are combined and fed into a current-controlled oscillator, which generates a PLL output frequency signal. Frequency gain of the VCO is substantially reduced, thus providing a PLL with improved tuning precision.
公开/授权文献
- US20090295439A1 Phase Lock Loop (PLL) with Gain Control 公开/授权日:2009-12-03
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