Speed-up charge pump and phase-locked loop and method for operating the same
US11115033B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 7, 2020 |
| Grant date | Sep 7, 2021 |
| Priority date | — |
| Expiry date | Oct 7, 2040 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03L7/099
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A speed-up charge pump includes a first charge pump for receiving an up signal and a down signal in digital form to produce a first voltage control signal at an output node. Further, at least one speed-up phase detector includes a first circuit path to receive the up signal and delay the up signal by a predetermined delay as a delay up signal and operate the up signal and the delay up signal by AND logic into an auxiliary up signal; and a second circuit path to receive the down signal and delay the down signal by the predetermined delay as a delay down signal and operate the down signal and the delay down signal by AND logic into an auxiliary down signal. A second charge pump is respectively receiving the auxiliary up and down signals to produce a second voltage control signal also at the output node.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.