Temperature compensation circuitry
US4639697A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 13, 1984 |
| Grant date | Jan 27, 1987 |
| Priority date | — |
| Expiry date | Sep 13, 2004 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H9/02834
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A surface acoustic wave (SAW) device provides a phase shift and a first predetermined phase shift variation as a function of temperature. A passive network including a passive, reactive component is thermally and electrically coupled to the SAW device. An electrical characteristic of the component has a predetermined variation as a function of the temperature of the reactive component which provides the network with a second, predetermined phase variation as a function of temperature to compensate for the first predetermined phase variation as a function of temperature provided from the surface acoustic wave device. With this arrangement, the phase shift provided from the surface acoustic wave device is substantially invariant with temperature.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.