Vacuum tube circuit
US7397303B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 3, 2003 |
| Grant date | Jul 8, 2008 |
| Priority date | — |
| Expiry date | Mar 22, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2200/513
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A vacuum tube circuit is capable of amplifying an input signal with use of a low source voltage. Ordinarily, the amount of electrons released from a cathode which is heated by a heater is small since a voltage supplied to the heater is low. In the vacuum tube circuit disclosed here, a positive voltage is supplied to a grid terminal, which more effectively attracts the emitted electrons, thereby increasing the amount of electrons arriving at the plate terminal passing through the grid. As a result, a grid current and a plate current flow in the vacuum tube circuit, which achieves an operation for amplifying an input signal from a signal source.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.