Dropout detecting apparatus
US5051614A · kind A · utility
8Cited by
6References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 23, 1989 |
| Grant date | Sep 24, 1991 |
| Priority date | — |
| Expiry date | May 23, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B20/10009
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A dropout detecting apparatus comprises a phase conversion circuit for converting an input signal into two signals which are different in phase by .pi./2 from each other, two squaring circuits for obtaining squares of the two signals respectively, an addition circuit for adding the two square signals, and an amplitude comparator for comparing the amplitude of an output signal of the addition circuit with a reference value. The output signal of the addition circuit becomes the square of the envelope of the input signal regardless of the phase of the input signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.