Power-up clear circuitry having two thresholds
US4581552A · kind A · utility
20Cited by
7References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 17, 1984 |
| Grant date | Apr 8, 1986 |
| Priority date | — |
| Expiry date | Feb 17, 2004 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K17/22
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
Power-up clear circuitry includes a latch which powers-up in a preferred state. Threshold detect circuitry changes the state of the latch when the supply voltage reaches its operating value, and then switches itself off. Transient protection circuitry ensures that the latch properly powers-up in the preferred state after a supply transient which drops below the threshold voltage of the circuit devices.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.