Invention Grant
- Patent Title: Transistor body bias control circuit for SRAM cells
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Application No.: US16129718Application Date: 2018-09-12
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Publication No.: US10685703B2Publication Date: 2020-06-16
- Inventor: Jainendra Singh , Sushikha Jain , Deepti Saini , Jwalant Kumar Mishra , Patrick Van de Steeg
- Applicant: NXP B.V.
- Applicant Address: US CA San Jose
- Assignee: NXP B.V.
- Current Assignee: NXP B.V.
- Current Assignee Address: US CA San Jose
- Main IPC: G11C8/08
- IPC: G11C8/08 ; G11C7/12 ; G11C11/419 ; G11C7/18 ; G11C8/14 ; G11C11/412 ; H01L27/11 ; G11C5/14

Abstract:
A semiconductor memory circuit includes a SRAM cell and a bias control circuit for biasing the SRAM cell. The SRAM cell includes pull-up, pull-down, and pass-gate transistors. The bias control circuit is connected to body terminals of the pull-down and pass-gate transistors for providing a bias voltage. The bias control circuit controls threshold voltages of the pull-down and pass-gate transistors by way of the bias voltage. The bias voltage, which is temperature dependent, is generated based on junction leakages at the body terminals of the pull-down and pass-gate transistors. The use of a temperature-dependent bias voltage to bias the body terminals of the pull-down and pass-gate transistors ensures that the write margin and the static noise margin (SNM) of the SRAM cell are relatively constant and above acceptable levels over a defined temperature range.
Public/Granted literature
- US20200082876A1 TRANSISTOR BODY BIAS CONTROL CIRCUIT FOR SRAM CELLS Public/Granted day:2020-03-12
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