Signal combining circuits
US3942002A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 11, 1974 |
| Grant date | Mar 2, 1976 |
| Priority date | — |
| Expiry date | Jul 11, 1994 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/40
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A signal combining circuit includes means for receiving a pair of digital waveforms of similar frequency and for producing a further waveform which is indicative by its phase of the relative amplitudes of the waveforms. A circuit arrangement is provided for reducing undesirable distortions of the shape of the further waveform, however this arrangement introduces undesirable phase modifications and means are provided for reducing the effect of these modifications. The relative phases of the two digital waveforms are, at a predetermined frequency, switched to one or other of two predetermined relationships and the phase of the further waveform obtained when one of the relationships occurs is compared with that obtained when the other relationship occurs in order to compensate for said modifications.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.