- Patent Title: Method and circuits for charge pump devices of phase-locked loops
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Application No.: US16248951Application Date: 2019-01-16
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Publication No.: US11115030B2Publication Date: 2021-09-07
- Inventor: Alan C. Rogers , Raghunand Bhagwan
- Applicant: Analog Bits Inc.
- Applicant Address: US CA Sunnyvale
- Assignee: Analog Bits Inc.
- Current Assignee: Analog Bits Inc.
- Current Assignee Address: US CA Sunnyvale
- Agency: Fish & Richardson P.C.
- Main IPC: H03L7/089
- IPC: H03L7/089

Abstract:
A charge pump includes: (I) a current source; (II) a p-channel source current network including: a first p-channel transistor; a second p-channel transistor; a p-channel current switch including at least one source terminal coupled to the drain terminal of the first p-channel transistor, at least one gate coupled to a phase comparator, and at least one drain terminal; a third p-channel transistor; and (III) a n-channel sink current network including: a first n-channel transistor; a second n-channel transistor; a third n-channel transistor; a n-channel current switch comprising at least one drain terminal coupled to the source terminal of the third n-channel transistor, at least one gate coupled to the phase comparator; and at least one source terminal coupled to the drain terminal of the first n-channel transistor; and wherein the p-channel source current network and the n-channel sink current network draw a baseline current from the first p-channel transistor.
Public/Granted literature
- US20190222216A1 METHOD AND CIRCUITS FOR CHARGE PUMP DEVICES OF PHASE-LOCKED LOOPS Public/Granted day:2019-07-18
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