System for recording waveforms using spatial dispersion
US4389590A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 26, 1981 |
| Grant date | Jun 21, 1983 |
| Priority date | — |
| Expiry date | Aug 26, 2001 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R13/34
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A waveform recorder wherein surface acoustic waves excited in a piezoelecc-insulator-semiconductor layered structure produce a traveling electric field in the semiconductor substrate. Charges stored in the traveling potential wells and representing the instantaneous amplitude of a waveform to be recorded are transferred at high speed and density to different respective spatial locations. Because each successive well represents a different time instant of the waveform, the different spatial locations correspond to different times. The output signal from each of the locations can be selectively delayed before application to a display oscilloscope to enable display of the waveform at a rate many times slower than the actual frequency of the signal waveform.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.