Amplifier arrangement for process controller
US4136307A · kind A · utility
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4References
4Claims
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Assignee
Inventor
Key dates
| Filing date | Jul 18, 1977 |
| Grant date | Jan 23, 1979 |
| Priority date | — |
| Expiry date | Jul 18, 1997 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05D5/03
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A process controller for diameter control in drawing optical fibre preforms consists essentially of the parallel arrangement of two output amplifiers, one providing low gain at low .+-. input voltages, while the other has high gain at high .+-. input voltages and effectively zero gain at low .+-. input voltages.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.