Invention Grant
- Patent Title: By odd integer digital frequency divider circuit and method
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Application No.: US16196426Application Date: 2018-11-20
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Publication No.: US10439618B2Publication Date: 2019-10-08
- Inventor: Thierry Robin , Bernard Pierre Francois Pechaud , Domenico Desposito
- Applicant: NXP USA, Inc.
- Applicant Address: US TX Austin
- Assignee: NXP USA, Inc.
- Current Assignee: NXP USA, Inc.
- Current Assignee Address: US TX Austin
- Agent Charlene R. Jacobsen
- Priority: EP17306893 20171222
- Main IPC: H03K21/00
- IPC: H03K21/00 ; H03K23/50 ; H03K21/02 ; H03K23/00

Abstract:
The present application relates to a circuit of a frequency divider arranged to divide a frequency of an input clock signal by odd integer N and a method of operating the circuit. A shift register comprises a number of N+1 clock gating cells, which are connected in series to each other, and a shift logic. An input clock signal is fed into clock signal inputs of each one of the number of N+1 clock gating cells. The shift logic is configured to receive enable signals from a set of the number of N+1 clock gating cells and to generate a feedback signal, which is supplied to a gate enable input of the first one of the number of N+1 clock gating cells. A multiplexer is configured to receive at input ports N+1 gated clock signals and to output a rotation clock signal, which has a frequency of 2/N of the frequency of the input clock signal. A frequency generator is configured to receive the rotation clock signal and to generate an output clock signal having a frequency of 1/N.
Public/Granted literature
- US20190199356A1 BY ODD INTEGER DIGITAL FREQUENCY DIVIDER CIRCUIT AND METHOD Public/Granted day:2019-06-27
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