Phase-locked loops that share a loop filter and frequency divider
US8963595B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 28, 2014 |
| Grant date | Feb 24, 2015 |
| Priority date | — |
| Expiry date | Jul 28, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03L7/099
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A shared loop filter includes an input port configured to selectively receive a first input from a first charge pump. The first charge pump is connected to a first phase locked loop (PLL) in a first die. The input port is further configured to selectively receive a second input from a second charge pump, the second charge pump connected to a second PLL in a second die separate from the first die. The shared loop filter further includes an output port configured to selectively provide an output to a first voltage controlled oscillator (VCO). The first VCO is connected to the first PLL. The output port is further configured to selectively output a second output to a second VCO. The second VCO is connected to the second PLL.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.