Vacuum tube circuit
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United States of America Patent
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Jul 8, 2008
Grant Date -
Oct 4, 2007
app pub date -
Nov 3, 2003
filing date -
Nov 5, 2002
priority date (Note) -
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status (Latency Note)
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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.
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