Invention Grant
- Patent Title: Method and apparatus for source-synchronous signaling
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Application No.: US16242475Application Date: 2019-01-08
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Publication No.: US10541693B2Publication Date: 2020-01-21
- Inventor: Jared L. Zerbe , Brian S. Leibowitz , Hsuan-Jung Su , John Cronan Eble, III , Barry William Daly , Lei Luo , Teva J. Stone , John Wilson , Jihong Ren , Wayne D. Dettloff
- Applicant: Rambus Inc.
- Applicant Address: US CA Sunnyvale
- Assignee: Rambus Inc.
- Current Assignee: Rambus Inc.
- Current Assignee Address: US CA Sunnyvale
- Agency: The Neudeck Law Firm, LLC
- Main IPC: H03L7/091
- IPC: H03L7/091 ; H03K5/156 ; H03L7/00 ; G11C7/10 ; G11C7/22 ; H04L7/00 ; H04L7/033 ; H03L7/08 ; H03L7/099 ; G11C7/04

Abstract:
A low-power, high-performance source-synchronous chip interface which provides rapid turn-on and facilitates high signaling rates between a transmitter and a receiver located on different chips is described in various embodiments. Some embodiments of the chip interface include, among others: a segmented “fast turn-on” bias circuit to reduce power supply ringing during the rapid power-on process; current mode logic clock buffers in a clock path of the chip interface to further reduce the effect of power supply ringing; a multiplying injection-locked oscillator (MILO) clock generator to generate higher frequency clock signals from a reference clock; a digitally controlled delay line which can be inserted in the clock path to mitigate deterministic jitter caused by the MILO clock generator; and circuits for periodically re-evaluating whether it is safe to retime transmit data signals in the reference clock domain directly with the faster clock signals.
Public/Granted literature
- US20190238142A1 METHOD AND APPARATUS FOR SOURCE-SYNCHRONOUS SIGNALING Public/Granted day:2019-08-01
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