公开(公告)号：US10153754B2

公开(公告)日：2018-12-11

申请号：US15460520

申请日：2017-03-16

Applicant: STMicroelectronics International N.V. ,  STMicroelectronics SA

Inventor： Alok Kumar Tripathi ,  Amit Verma ,  Pascal Urard

IPC: H03K3/012 ,  H03K3/356 ,  H03K19/00 ,  H03K3/3562

Abstract: A synchronous retention flip-flop circuit includes a first circuit module powered by an interruptible power source and a second circuit module powered by a permanent power source. The first circuit module includes a first latch circuit and a second latch circuit which are configured to store at least one datum while the interruptible power source is supplying power. A transmission circuit operates to deliver the at least one datum to the second circuit module before an interruption of the interruptible power source. The second circuit module preserves the at least one datum during the interruption. Following an end of the interruption, a restoring circuit transfers the at least one datum from the second circuit module to the first circuit module via a single one of the first and second latch circuits.

公开(公告)号：US20180083602A1

公开(公告)日：2018-03-22

申请号：US15460520

申请日：2017-03-16

Applicant: STMicroelectronics International N.V. ,  STMicroelectronics SA

Inventor： Alok Kumar Tripathi ,  Amit Verma ,  Pascal Urard

IPC: H03K3/356 ,  H03K3/012 ,  H03K19/00

CPC classification number: H03K3/356104 ,  H03K3/012 ,  H03K3/35625 ,  H03K19/0002

Abstract: A synchronous retention flip-flop circuit includes a first circuit module powered by an interruptible power source and a second circuit module powered by a permanent power source. The first circuit module includes a first latch circuit and a second latch circuit which are configured to store at least one datum while the interruptible power source is supplying power. A transmission circuit operates to deliver the at least one datum to the second circuit module before an interruption of the interruptible power source. The second circuit module preserves the at least one datum during the interruption. Following an end of the interruption, a restoring circuit transfers the at least one datum from the second circuit module to the first circuit module via a single one of the first and second latch circuits.

公开(公告)号：US10277207B1

公开(公告)日：2019-04-30

申请号：US15892308

申请日：2018-02-08

Applicant: STMicroelectronics International N.V.

Inventor： Alok Kumar Tripathi ,  Amit Verma ,  Anuj Grover ,  Deepak Kumar Bihani ,  Tanmoy Roy ,  Tanuj Agrawal

IPC: H03K3/00 ,  H03K3/3562 ,  G11C11/412

Abstract: The present disclosure is directed to a master-slave flip-flop memory circuit having a partial pass gate transistor at the input of the master latch. The partial pass gate transistor includes a pull-up clock enabled transistor for selectively coupling a high output of a test switch to the input of the master latch. The input of the master latch is also directly coupled to a low output of the test switch around the partial pass gate. In addition, a revised circuit layout is provided in which the master latch has three inverters. A first inverter is coupled to the input of the master latch. Second and third inverters are coupled to an output of the first inverter, with the second inverter having an output coupled to the input of the first inverter, and the third inverter having an output coupled to an output of the master latch. The first and second inverters are clock enabled, and the third inverter is reset enabled.