Digital cathode current control loop
US4687970A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 31, 1985 |
| Grant date | Aug 18, 1987 |
| Priority date | — |
| Expiry date | May 31, 2005 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J1/135
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A digital cathode current control circuit for controlling the cathode current of a traveling wave tube (TWT) amplifier is disclosed. The cathode current control circuit includes circuitry for providing a comparison signal indicative of the occurrence and amplitude of TWT cathode current pulses; clocking circuitry responsive to the comparison signal for providing a clock signal delayed relative the occurrence of a cathode current pulse; comparison circuitry for comparing the comparison signal with predetermined reference signals indicative of a predetermined cathode current level, and for providing adjustment signals indicative of the adjustment of the TWT cathode current necessary to tend to achieve the predetermined cathode current; and counter circuitry clocked by the delayed clock signal for providing an output count in response to the adjustment signals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.