Slow-start system for a control circuit
US4737669A · kind A · utility
5Cited by
1References
6Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 31, 1986 |
| Grant date | Apr 12, 1988 |
| Priority date | — |
| Expiry date | Jul 31, 2006 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K17/22
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A control circuit having a slow-start section is enabled to carry out its expected, principal function(s) only after the voltage at the slow-start section input has reached a certain level. The system assures that a delay interval in control circuit operation is measured from the time devices within the circuit's internal voltage supply become effective to deliver voltage levels sufficient to allow the circuit to perform the principal function. A delay network is connected across a device of the internal voltage supply, which otherwise supplies an operating voltage level to the control circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.