- 专利标题: Charge pump circuit and phase-locked loop
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申请号: US16476391申请日: 2018-02-05
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公开(公告)号: US11218152B2公开(公告)日: 2022-01-04
- 发明人: Qing Ding , Haifeng Zhou , Guangsheng Wu , Xiaocong Li
- 申请人: China Communication Microelectronics Technology Co., Ltd. , China Communication Technology Co., Ltd.
- 申请人地址: CN Guangdong; CN Guangdong
- 专利权人: China Communication Microelectronics Technology Co., Ltd.,China Communication Technology Co., Ltd.
- 当前专利权人: China Communication Microelectronics Technology Co., Ltd.,China Communication Technology Co., Ltd.
- 当前专利权人地址: CN Guangdong; CN Guangdong
- 代理机构: Panitch Schwarze Belisario & Nadel LLP
- 优先权: CN201710067159.9 20170207
- 国际申请: PCT/CN2018/075271 WO 20180205
- 国际公布: WO2018/145612 WO 20180816
- 主分类号: H03L7/08
- IPC分类号: H03L7/08 ; H03L7/089 ; H03L7/091 ; H03L7/093 ; H03L7/099 ; H02M3/07
摘要:
A charge pump circuit and phase-locked loop include start, bias, current mirror, charging and discharging feedback control, and charging and discharging matching modules, which are electrically connected in sequence. The start module starts the bias module. The bias module generates constant bias current and outputs same to the current mirror module, which receives and amplifies the bias current for output in two paths. The charging and discharging feedback control module detects the output voltage of a charge pump and controls, according to feedback of the output voltage, the current in the charging and discharging matching module, to suppress the mismatch between charging and discharging currents. The charging and discharging matching module receives an external charging or discharging control signal, to charge or discharge the output load of the charge pump. Charging and discharging currents can be matched within a wide output voltage range, without an operational amplifier.
公开/授权文献
- US20200052705A1 CHARGE PUMP CIRCUIT AND PHASE-LOCKED LOOP 公开/授权日:2020-02-13
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