Invention Grant
- Patent Title: Methods and circuits for preventing hold time violations
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Application No.: US15267880Application Date: 2016-09-16
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Publication No.: US09954534B2Publication Date: 2018-04-24
- Inventor: Ilya K. Ganusov , Benjamin S. Devlin , Henri Fraisse
- Applicant: Xilinx, Inc.
- Applicant Address: US CA San Jose
- Assignee: XILINX, INC.
- Current Assignee: XILINX, INC.
- Current Assignee Address: US CA San Jose
- Agent LeRoy D. Mauna
- Main IPC: H03K19/177
- IPC: H03K19/177 ; H01L25/00 ; H03K3/037 ; G06F17/50

Abstract:
Aspects of various embodiments of the present disclosure are directed to methods and circuits for preventing hold time violations in clock synchronized circuits. In an example implementation, a circuit includes at least a first flip-flop, a second flip-flop, and a level-sensitive latch connected in a signal path from the first flip-flop to the second flip-flop. A clock node of the first flip-flop is connected to receive a first clock signal and a clock node of the second flip-flop is connected to receive a second clock signal. The propagation delay from the first flip-flop through the level-sensitive latch to the second flip-flop is smaller than the skew between the first clock and the second clock, thereby presenting a hold time violation. A level-sensitive latch control circuit is configured to prevent the hold time violation by providing a pulsed clock signal to a clock node of the one level-sensitive latch circuit.
Public/Granted literature
- US20180083633A1 METHODS AND CIRCUITS FOR PREVENTING HOLD TIME VIOLATIONS Public/Granted day:2018-03-22
Information query
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