Voltage regulators with improved wake-up response
US8710914B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 8, 2013 |
| Grant date | Apr 29, 2014 |
| Priority date | — |
| Expiry date | Feb 8, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05F1/565
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
Techniques are presented for improving the wake-up response of voltage regulation circuits. A first set of techniques relate to the inputs an op-amp in a regulation circuit. In regulated operation, one input receives feedback from the regulator's output. Instead, during reset, after resetting the op-amp's output node to the supply level, this input of op-amp is instead connected to ground in order to increase the amount of tail current through the op-amp in order to more quickly bring down the op-amp's output node. A detection circuit is introduced to determine when the op-amp's input is reconnected to receive feedback. In a complementary sets of techniques, when the circuit on which the regulator is formed receives an enable signal and the output of the regulator will be needed for an operation, and when the regulator is not yet back at operating levels, its supply is temporarily shorted to the supply level.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.