By odd integer digital frequency divider circuit and method
US10439618B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 20, 2018 |
| Grant date | Oct 8, 2019 |
| Priority date | — |
| Expiry date | Nov 20, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K23/005
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.