Clock generating circuit and hybrid circuit
US10778405B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 10, 2019 |
| Grant date | Sep 15, 2020 |
| Priority date | — |
| Expiry date | Jul 10, 2039 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L7/0087
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
Disclosed is a clock generating circuit capable of operating in an analog clock data recovery (ACDR) mode to reduce the loop latency or a clock multiplication unit (CMU) mode to suppress reference jitter. The circuit includes a filter and an oscillator. The filter receives an input signal to determine voltages of a first node and a second node respectively and includes a first filtering circuit and a second filtering circuit coupled in parallel between the first node and a reference voltage terminal. The second filtering circuit includes a switch and a capacitor connected in series, wherein the second node is between the switch and capacitor, and the switch is turned off in the ACDR mode and turned on in the CMU mode. The oscillator outputs a clock according to the first node's voltage in the ACDR mode or according to the second node's voltage in the CMU mode.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.