Invention Grant
- Patent Title: PLL with wide frequency coverage
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Application No.: US16240702Application Date: 2019-01-04
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Publication No.: US10778236B2Publication Date: 2020-09-15
- Inventor: Arshan Aga , Xiang Gao , Ni Xu
- Applicant: CREDO TECHNOLOGY GROUP LIMITED
- Applicant Address: KY Grand Cayman
- Assignee: Credo Technology Group Limited
- Current Assignee: Credo Technology Group Limited
- Current Assignee Address: KY Grand Cayman
- Agency: Ramey & Schwaller LLP
- Agent Daniel J. Krueger
- Main IPC: H03L7/099
- IPC: H03L7/099 ; H03L7/197 ; H03L7/089 ; H03K19/20

Abstract:
An illustrative PLL circuit and method for generating a clock signal over a wide frequency range without gaps. In one illustrative embodiment, an extended-range PLL includes: a phase comparator that determines a phase error between a reference clock and a feedback clock; a loop filter that converts the phase error into a control signal; a voltage controlled oscillator (VCO) that provides a generated clock signal having a generated clock frequency determined by the control signal; a divide-by-1.5 block that produces a reduced-frequency clock signal in response to the generated clock signal; and a multiplexer that selects one of the generated clock signal and the reduced-frequency clock signal as a selected clock signal.
Public/Granted literature
- US20200220550A1 PLL with Wide Frequency Coverage Public/Granted day:2020-07-09
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