Power supply controlled operation sequencing method and apparatus
US5763960A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 27, 1997 |
| Grant date | Jun 9, 1998 |
| Priority date | — |
| Expiry date | Feb 27, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K17/223
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A method and apparatus for sequencing the operation of electronic circuits based upon the level of the voltage provided by an external power supply. One or more power supply sequencer circuits may be interposed between an external power supply and one or more electronic circuits. The power supply sequencer circuits comprise a transistor having its high current node coupled to an external power supply, its controlling node coupled to a voltage sequencing means such as a diode and a resistor, wherein the resistor is in turn coupled to the external power supply and the diode is coupled to the ground potential. The transistor has its controlled high current node coupled through a power input node to the power input for the electronic circuit to condition the voltage received thereby. The power input node is in turn coupled through a second resistor to ground potential. The power sequencer circuits set a sequenced voltage level for transitioning the potential supplied to the electronic circuits from the ground potential to the operating potential of the power supply. Multiple versions of the power supply sequencers may be used to enable the sequential operation of an entire system durin…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.