Saw oscillator gain amplifier with auto phase shift
US5304958A · kind A · utility
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11References
7Claims
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Key dates
| Filing date | Nov 20, 1992 |
| Grant date | Apr 19, 1994 |
| Priority date | — |
| Expiry date | Nov 20, 2012 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S331/03
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A gain stage for providing an automatic phase shift is provided. In particular, the gain stage detects whether an oscillation signal appears at its inputs. If an oscillation signal is not detected, then the gain stage inverts output signals occurring at outputs of a first amplifier before being respectively applied to inputs of a second amplifier. This has the overall effect of implementing a 180.degree. phase shift of a signal appearing at the outputs of the gain stage with respect to a signal appearing at the inputs of the gain stage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.