Power efficient voltage to current coverter
US5258653A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 30, 1991 |
| Grant date | Nov 2, 1993 |
| Priority date | — |
| Expiry date | Sep 30, 2011 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2203/30048
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A power efficient amplifier uses two stages, a low voltage stage and a high voltage stage. The low voltage stage supplies a nominal operating current to a load from a low voltage low power output when the requirements are small, and the high voltage stage supplies a desired output current to the load exceeding the nominal operating current when the load requires such. Switching to the high voltage output stage in response to sensing current to the load exceeding the nominal operating current conserves energy and increases operational efficiency. The amplifier circuitry produces a power efficient voltage-to-current transformation. The circuitry includes an operational amplifier that receives a signal proportional to the current flowing to the load and, an input signal which represents the desired load current. When the output increases above a certain level, it turns off the low voltage stage and turns on the high voltage stage causing the available output power to increase. A power efficient amplifier is obtained by operating with the lowest required output power.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.