Invention Grant
- Patent Title: Programmable-on-the-fly fractional divider in accordance with this disclosure
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Application No.: US17193532Application Date: 2021-03-05
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Publication No.: US11251784B2Publication Date: 2022-02-15
- Inventor: Jeet Narayan Tiwari , Anand Kumar , Prashutosh Gupta
- Applicant: STMicroelectronics International N.V.
- Applicant Address: CH Geneva
- Assignee: STMicroelectronics International N.V.
- Current Assignee: STMicroelectronics International N.V.
- Current Assignee Address: CH Geneva
- Agency: Crowe & Dunlevy
- Main IPC: H03K5/00
- IPC: H03K5/00 ; H03K19/20 ; H03L7/197

Abstract:
A divider circuit includes a subtract-by-two circuit receiving MSBs of an input and producing a subtracted-by-two output, a subtract-by-one circuit receiving the MSBs and producing a subtracted-by-one output, a first multiplexer passing the subtracted-by-two or the subtracted-by-one output based on a first control signal, a second multiplexer passing output of the first multiplexer or the MSBs based on a second control signal to produce an asynchronous divisor. An asynchronous one-shot N+2 divider divides an input clock by the asynchronous divisor to produce a first divided signal. An output flip-flop receives the first divided signal and is clocked by an inverse of the input clock to produce a second divided signal. A third multiplexer passes the first divided signal or the second divided signal in response to a select load signal to produce a multiplexer output. A divider divides the multiplexer output by a set divisor to produce an output clock.
Public/Granted literature
- US20210281254A1 PROGRAMMABLE-ON-THE-FLY FRACTIONAL DIVIDER IN ACCORDANCE WITH THIS DISCLOSURE Public/Granted day:2021-09-09
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