Invention Grant
- Patent Title: Phase interpolator and a delay circuit for the phase interpolator
- Patent Title (中): 相位内插器和相位内插器的延迟电路
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Application No.: US12761419Application Date: 2010-04-16
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Publication No.: US08446198B2Publication Date: 2013-05-21
- Inventor: Anant Shankar Kamath , Krishnaswamy Nagaraj , Sudheer Kumar Vemulapalli , Jayawardan Janardhanan , Karthik Subburaj , Sujoy Chakravarty , Vikas Sinha
- Applicant: Anant Shankar Kamath , Krishnaswamy Nagaraj , Sudheer Kumar Vemulapalli , Jayawardan Janardhanan , Karthik Subburaj , Sujoy Chakravarty , Vikas Sinha
- Applicant Address: US TX Dallas
- Assignee: Texas Instruments Incorporated
- Current Assignee: Texas Instruments Incorporated
- Current Assignee Address: US TX Dallas
- Agent John R. Pessetto; W. James Brady; Frederick J. Telecky, Jr.
- Main IPC: H03L7/00
- IPC: H03L7/00

Abstract:
Phase interpolator and a delay circuit for the phase interpolator. The phase interpolator includes a variable delay circuit to rotate phase of an input clock to generate a phase rotated signal. The phase interpolator also includes a delay locked loop coupled to the variable delay circuit to generate a plurality of phase shifted outputs. The delay locked loop includes a plurality of delay elements. Each delay element includes a multiplexer and a delay cell coupled to the multiplexer. The multiplexer is configurable using a first control signal to output one of the phase rotated signal and a phase shifted output of the plurality of phase shifted outputs. The delay cell delays one of the phase rotated signal and the phase shifted output to generate another phase shifted output of the plurality of phase shifted outputs.
Public/Granted literature
- US20110254603A1 PHASE INTERPOLATOR AND A DELAY CIRCUIT FOR THE PHASE INTERPOLATOR Public/Granted day:2011-10-20
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