Constant current circuit start-up circuitry for preventing power input oscillation
US8476891B2 · kind B2 · utility
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7References
10Claims
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Key dates
| Filing date | Nov 30, 2010 |
| Grant date | Jul 2, 2013 |
| Priority date | — |
| Expiry date | Feb 1, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05F3/242
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
Provided is a constant current circuit capable of low current consumption operation, which is prevented from repeating a start-up state and a zero steady state and entering an oscillating state when power is activated. When power is activated, until a node (A) reaches a start-up state, an excitation current is continued to be supplied to a node (B), to thereby reliably start up the constant current circuit in a short period of time without repeating the start-up state and the zero steady state.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.