Regulator and related control method for preventing exceeding initial current by compensation current of additional current mirror
US7053597B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 2, 2003 |
| Grant date | May 30, 2006 |
| Priority date | — |
| Expiry date | Mar 2, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05F3/262
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A regulator and a related control method for providing a regulated voltage. The regulator includes a bipolar junction transistor (BJT), a capacitive module having capacitors, and an operational amplifier (OP-AMP) for feedback control. The OP-AMP has a amplifying circuit, a driving stage and a current mirror. The BJT charges the capacitive module to establish the regulated voltage, the OP-AMP controls a driving current of a base of the BJT according to the feedback of the regulated voltage. When the regulated voltage is in a predetermined range, the current mirror provides a secondary current through the driving stage such that the driving current is reduced, and the current of the BJT is thus limited to its rated current. When the regulated voltage is out of the predetermined range, the current mirror stops providing the secondary current, and the regulator will operate normally without current supplied by the current mirror.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.