Power-supply voltage fluctuation inhibiting circuit
US6252384A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 7, 2000 |
| Grant date | Jun 26, 2001 |
| Priority date | — |
| Expiry date | Apr 7, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F1/28
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Disclosed are a circuit and method for inhibiting a fluctuation in power-supply terminal voltage of a CPU caused by a change in working current of the CPU, which is connected to a DC power supply. The circuit includes a CPU controlled between a sleep state and an operating state by the value of a stop-clock signal applied thereto from a stop-clock terminal; a transistor inserted in parallel with the CPU across power-supply terminals thereof; and a control circuit for controlling the flow of current into the transistor in dependence upon a change in the power-supply current of the CPU caused by a change in the stop-clock signal, thereby inhibiting a fluctuation in voltage across the power-supply terminals of the CPU.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.