Frequency control circuit, frequency control method and phase locked loop circuit
US9722832B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 23, 2016 |
| Grant date | Aug 1, 2017 |
| Priority date | — |
| Expiry date | Jun 23, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2027/0067
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A frequency control circuit, adapted to be utilized in a phase locked loop circuit. The frequency control circuit includes a first frequency control block, a second frequency control block, a pump control unit and a charge pump unit. The first frequency control block generates a first control signal according to a frequency of an output signal from the phase locked loop circuit, in which the first control signal is configured to control the frequency of the output signal located within a predetermined frequency region. The second frequency control block generates a second control signal according to a frequency of an input signal and the frequency of the output signal, in which the second control signal is configured to control the frequency of the output signal located at a target frequency.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.