Remote tone burst electromagnetic acoustic transducer pulser
US5426388A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 15, 1994 |
| Grant date | Jun 20, 1995 |
| Priority date | — |
| Expiry date | Feb 15, 2014 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K3/57
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A remote tone burst pulser for an electromagnetic acoustic transducer utilizes a circuit having a direct current power source which is provided to a main capacitor. A high power, high speed insulated gate bipolar transistor or metal oxide-semiconductor controlled thyristor is operatively connected to the main capacitor and the coil of the transducer. A drive circuit is operatively connected to this device for transmitting a train of switch pulses which causes radio frequency alternating current to be provided to the transducer coil. A power transistor is operatively connected to the first transistor and is activated by a second drive circuit for causing a conducting state which allows for the power being applied to the transducer coil to be rapidly dissipated by a resistor and the internal resistance of the power transistor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.