Motor drive amplifier
US4383205A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 25, 1981 |
| Grant date | May 10, 1983 |
| Priority date | — |
| Expiry date | Nov 25, 2001 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F3/343
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A motor drive circuit comprising a differential amplifier having inverting and non-inverting inputs and further having an output which is connected to the inputs of separate NPN and PNP, super-alpha configured amplifiers whose combined outputs are supplied to one lead of a motor. The other lead of the motor is connected through a resistor to the circuit ground. The voltage developed across this resistor is supplied to the inverting input of the differential amplifier such that the current through the motor will be equal to the input voltage supplied to the non-inverting input of the differential amplifier divided by the resistance of the resistor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.