Load drive device
US6236122A · kind A · utility
13Cited by
10References
2Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 15, 1999 |
| Grant date | May 22, 2001 |
| Priority date | — |
| Expiry date | Apr 15, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K2217/0081
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
In a circuit that controls the mean current flowing to a load 40 by turning ON or OFF in predetermined ratio the power source voltage VB applied to load 40 using for this purpose a switch means Sw1, a capacitor C1 is charged with the potential difference generated between the load 40 and power source whilst switch means Sw1 is OFF, and a voltage for control purposes which exceeds power source voltage VB is applied to drive circuit 20 using this stored voltage. A high side switch can thereby be implemented using N type semiconductor elements in a simple circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.