Invention Grant
- Patent Title: Phase frequency detector with pulse width control circuitry
- Patent Title (中): 具有脉冲宽度控制电路的相位频率检测器
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Application No.: US12120827Application Date: 2008-05-15
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Publication No.: US07728631B2Publication Date: 2010-06-01
- Inventor: Lalitkumar Nathawad
- Applicant: Lalitkumar Nathawad
- Applicant Address: US CA Santa Clara
- Assignee: Atheros Communications, Inc.
- Current Assignee: Atheros Communications, Inc.
- Current Assignee Address: US CA Santa Clara
- Agency: DeLizio Gilliam, PLLC
- Main IPC: H03D13/00
- IPC: H03D13/00

Abstract:
A phase frequency detector comprising a detection circuit and a reset circuit. The phase frequency detector may receive a feedback signal having a predetermined pulse width. The detection circuit may generate a first control signal based on a reference signal, and a second control signal based on the feedback signal. The reset circuit may generate a reset signal used for resetting the detection circuit based on the first control signal, the second control signal, and the feedback signal. The feedback signal may be tied to the generation of the reset signal such that, during a locked state, the pulse width of the second control signal is approximately equal to the pulse width of the feedback signal, which helps reduce the sensitivity of the circuit to nonlinearities.
Public/Granted literature
- US20090285279A1 PHASE FREQUENCY DETECTOR WITH PULSE WIDTH CONTROL CIRCUITRY Public/Granted day:2009-11-19
Information query
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