公开(公告)号：US10033362B1

公开(公告)日：2018-07-24

申请号：US15562893

申请日：2017-02-24

Applicant: Southeast University

Inventor： Weiwei Shan ,  Liang Wan ,  Longxing Shi

IPC: H03H11/26 ,  H03K5/133 ,  H03L7/18

Abstract: A PVTM-based wide voltage range clock stretching circuit is disclosed. The circuit consists of a PVTM circuit module, a phase clock generation module, a clock synchronization selection module and a control module. The PVTM circuit module monitors in real time the delay information of an on-chip delay unit to monitor the operating environment of the circuit, and feeds the delay information back to the control module. Under the control of a clock stretching enable signal and a clock stretching extent signal, the control module selects a target phase clock from the clocks generated by the phase clock generation module in accordance with the feedback from the PVTM, enabling the stretching of system clock within a single cycle in different PVT conditions. Sophisticated gate devices are not required, and the cost of area and power consumption are kept to minimal.