Invention Grant
- Patent Title: Digital phase detector for a phase locked loop
- Patent Title (中): 用于锁相环的数字相位检测器
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Application No.: US11048571Application Date: 2005-01-31
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Publication No.: US07706496B2Publication Date: 2010-04-27
- Inventor: Edward Youssoufian
- Applicant: Edward Youssoufian
- Applicant Address: US MA Woburn
- Assignee: Skyworks Solutions, Inc.
- Current Assignee: Skyworks Solutions, Inc.
- Current Assignee Address: US MA Woburn
- Main IPC: H03D3/24
- IPC: H03D3/24 ; H04L7/00

Abstract:
According to one exemplary embodiment, a digital phase detector includes a phase/frequency detector, where the phase/frequency detector is configured to receive a reference signal and a divided oscillator feedback signal and output a first pulse-width modulated signal and a second pulse-width modulated signal. The digital phase detector also includes a first time-to-digital converter, where the first time-to-digital converter is coupled to the phase/frequency detector. The first time-to-digital converter is configured to receive and convert the first pulse-width modulated signal to a first digital number. The digital phase detector further includes a second time-to-digital converter coupled to the phase/frequency detector and configured to receive and convert the second pulse-width modulated signal to a second digital number. The digital phase detector further includes a summation element, where the summation element is configured to subtract the second digital number from the first digital number and output a digital phase error signal.
Public/Granted literature
- US20060171495A1 Digital phase detector for a phase locked loop Public/Granted day:2006-08-03
Information query
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