Power on reset circuit for microprocessor
US4553054A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 4, 1983 |
| Grant date | Nov 12, 1985 |
| Priority date | — |
| Expiry date | Feb 4, 2003 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K17/223
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A circuit for generating a pulse when a voltage (VDD) is applied thereto comprising an input (10) for receiving the applied voltage, an output (36), a first capacitor (16) connected to be charged from the input through a first switch (12), a second capacitor (18) connected to be charged from the first capacitor through a second switch (14), control means (34) for alternately enabling the first and second switches and switch means (20, 22, 24, 26) connected to the second capacitor for applying the applied voltage to the output when the voltage on the second capacitor is less than a predetermined value and for applying ground voltage to the output when the voltage on the second capacitor is greater than the predetermined value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.