Circuit and method of modifying characteristics of a utilization circuit
US5679275A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 3, 1995 |
| Grant date | Oct 21, 1997 |
| Priority date | — |
| Expiry date | Jul 3, 2015 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01C17/267
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A modification circuit (30) is thermally coupled to and electrically isolated from a circuit element (20) of a utilization circuit (10). During modification, current pulses are passed through an isolation circuit (40) to the modification circuit which heats the circuit element, e.g., a resistor, of the utilization circuit substantially above the normal operating temperature range of the element, thereby modifying the electrical characteristics of the resistor and therefore those of the utilization circuit to which it is connected. During normal operation of the utilization circuit the circuit element of the utilization circuit is electrically isolated from the modification circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.