Protection circuit against voltage or current spikes, and clock circuit using a protection circuit of this kind
US6765405B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 9, 2002 |
| Grant date | Jul 20, 2004 |
| Priority date | — |
| Expiry date | Jul 9, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K19/0075
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
Disclosed are protection circuitry, and methods of operating the same, for use with clock circuits associated with integrated circuits (ICs). According to one exemplary embodiment, the protection circuitry is operable to generate at least two intermediate clock signals as a function of a received clock signal, and process the at least two intermediate clock signals to (i) cause an output of the protection circuitry to enter a high-impedance state when the at least two intermediate clock signals are different, and (ii) generate a resultant clock signal at the output of the protection circuitry equal to the received clock signal when the at least two intermediate clock signals are identical.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.