Peak detector for amplitude modulated signals
US5491681A · kind A · utility
3Cited by
8References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 13, 1993 |
| Grant date | Feb 13, 1996 |
| Priority date | — |
| Expiry date | Dec 13, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B17/34
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A circuit for detecting when peaks occur in an amplitude modulated electrical signal, and for measuring in real time the amplitudes of the detected peaks. The circuit delays the input signal a short time, and then notes when the input signal and its delayed version have the same amplitude, thereby to detect when a peak has occurred. The amplitude of the peak is then measured. This circuit and technique have particular advantages when used as part of a servo control system that positions a read/write head to accurately follow moving tracks of recorded data on magnetic tape, magnetic disks, optical disks, and the like.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.