Power supplies
US5251121A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 18, 1990 |
| Grant date | Oct 5, 1993 |
| Priority date | — |
| Expiry date | Oct 18, 2010 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01J3/36
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Power supplies for generating a stream of electrical pulses in which successive pulses have opposite polarities. The pulses are formed and outputted from pulse generating circuitry which has two complementary pairs of MOSFETs arranged in an H-bridge configuration. Other major components of the power supply are voltage regulators for supplying positive and negative operating pulses with selected, precisely controlled voltages to the driver and watchdog circuits for disenabling the pulse outputting circuitry if: the frequency of the operating pulses deviate from a selected range, the widths of the operating pulses exceed a selected maximum, extraneous pulses are present, or the voltage of the operating pulses falls below or exceeds selected maximums. In one important application, the power supply is employed to drive the emitter of an infrared radiation source.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.