Clock frequency overshoot detection circuit
US8525597B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 3, 2011 |
| Grant date | Sep 3, 2013 |
| Priority date | — |
| Expiry date | May 23, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03L7/07
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An electronic circuit operating on a first clock signal includes a clock frequency overshoot detection circuit for detecting frequency overshoots in the first clock signal. The clock frequency overshoot detection circuit includes a shift register having an even number plurality of flip-flops. The flip-flops toggle to generate output bit patterns indicative of a frequency overshoot condition. A comparator connected to the shift register generates a comparison signal on detecting the frequency overshoot condition. A latch circuit connected to the comparator generates a frequency overshoot indication signal and the electronic circuit is shifted to a second (or safe) clock signal until the frequency of the first clock signal is rectified.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.