Invention Grant
- Patent Title: PLL filter having a capacitive voltage divider
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Application No.: US16276329Application Date: 2019-02-14
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Publication No.: US10693474B1Publication Date: 2020-06-23
- Inventor: George Efthivoulidis , Peter Thurner
- Applicant: Infineon Technologies AG
- Applicant Address: DE Neubiberg
- Assignee: Infineon Technologies AG
- Current Assignee: Infineon Technologies AG
- Current Assignee Address: DE Neubiberg
- Agency: Murphy, Bilak & Homiller, PLLC
- Main IPC: H03L7/093
- IPC: H03L7/093 ; H03H7/06 ; H02M3/07

Abstract:
A phase-locked loop (PLL) includes a detector configured to generate an error signal based on a difference between a reference signal and an output signal, a charge pump configured to generate current pulses based on the error signal, a loop filter configured to generate a control voltage based on the current pulses, and a voltage-controlled oscillator (VCO) configured to generate the output signal at a frequency which is a function of the control voltage. The loop filter includes a capacitive voltage divider configured to reduce the control voltage from a range that falls within a voltage domain of the charge pump to a range that falls within a voltage domain of the VCO, the voltage domain of the charge pump being greater than the voltage domain of the VCO.
Information query
IPC分类: