Current sense circuit for a bubble memory voltage booster
US4514648A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 27, 1982 |
| Grant date | Apr 30, 1985 |
| Priority date | — |
| Expiry date | Aug 27, 2002 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K17/64
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
In a voltage boost circuit for use in conjunction with a bubble memory operational driver, an output transistor is alternately turned on and off. When turned on, current flows through an inductor. When turned off, a high voltage is built up across the inductor which causes charge to be transferred to and stored in a capacitor. When the output transistor is turned on so as to permit current to flow through the inductor, a .DELTA.V.sub.BE /R current representative of the current flowing through the output transistor is compared with a .DELTA.V.sub.BE /R reference current. When the first current reaches and exceeds the reference current, the output transistor is turned off.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.