Synchronized output of multiple ring oscillators
US8395454B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 13, 2011 |
| Grant date | Mar 12, 2013 |
| Priority date | — |
| Expiry date | May 13, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K3/0315
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A circuit for producing a synchronized output of multiple ring oscillators is disclosed. In one embodiment, the circuit includes a first ring oscillator configured to generate a first periodic signal and a second ring oscillator configured to generate a second periodic signal. The circuit may further include a selection unit coupled to receive the first periodic signal and the second periodic signal. The selection unit is configured to convey a first clock edge into each of the first and second ring oscillators responsive to a most recently received rising edge from one of the first and second periodic signals. The selection unit is further configured to convey a second clock edge into each of the first and second ring oscillators responsive to a most recently received falling edge from one of the first and second periodic signals, wherein the first and second clock edges are opposite in direction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.