Method and apparatus for automatic loop control
US5398006A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 15, 1993 |
| Grant date | Mar 14, 1995 |
| Priority date | — |
| Expiry date | Mar 15, 2013 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03L7/08
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method of automatically controlling a loop comprising the steps of applying an input signal and an error correction signal to a signal correction circuit to provide a digital corrected signal. Applying the digital corrected signal and a reference signal to an error measurement circuit and providing a difference signal representative of the difference between the corrected signal and the reference signal. Applying the difference signal to a tri-state buffer having an output which is switchable to high impedance and passing the error correction signal to a correction circuit through an integrator and a local generator circuit. The buffer is switched to high impedance when the difference between the error correction signal and the reference signal is zero.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.