Voltage sense circuit for a bubble memory voltage booster
US4461989A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 27, 1982 |
| Grant date | Jul 24, 1984 |
| Priority date | — |
| Expiry date | Aug 27, 2002 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11C5/145
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
In a voltage boost circuit for use in conjunction with a bubble memory operational driver, an output transistor alternately turns on and off so as to permit current to flow through an inductor which, when terminated by turning off the output transistor, causes a high voltage to be built up across the inductor which causes charge to be transferred to and stored in a capacitor. The output transistor is not turned on again until the voltage across the inductor falls below a predetermined value. A current mirror circuit is coupled to the comparator input and includes a buffer transistor which, when the voltage at the comparator input exceeds the break-down voltage of the buffer transistor, acts as a BV.sub.ceo level shifter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.