Duty cycle correction systems and methods
US8143928B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 29, 2011 |
| Grant date | Mar 27, 2012 |
| Priority date | — |
| Expiry date | Apr 29, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03L7/087
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
Duty cycle correction systems and methods of adjusting duty cycles are provided. One such duty cycle correction system includes a duty cycle adjustor and a variable delay line coupled to the output of the duty cycle adjustor. First and second phase detectors have first inputs coupled to the output of the duty cycle adjustor through an inverter and second inputs coupled to the output of the variable delay line. The phase detectors cause the delay line to align rising or falling edges of signals at the output of the delay line with rising or falling edges, respectively, of signals at the output of the inverter. The controller simultaneously causes the duty cycle adjustor to adjust the duty cycle of the output clock signal until the rising and falling edges of signals at the output of the delay line are aligned with rising and falling edges, respectively, of signals at the output of the inverter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.