Amplifiers – With electron beam tube amplifying device
Reexamination Certificate
2011-05-03
2011-05-03
Shingleton, Michael B (Department: 2815)
Amplifiers
With electron beam tube amplifying device
C030S109000, C030S127000
Reexamination Certificate
active
07936211
ABSTRACT:
Controlling the performance of the thermionic tube (102) having a cathode (103), a plate (104) and a grid (105) is disclosed. The tube is configured to provide amplification of an audio derived signal (106) and is arranged to apply a grid bias voltage to the grid. The absence of an input audio signal is detected whereafter output current between cathode and plate is measured to identify actual output current. The actual output current is compared against a preferred output current and the grid bias voltage is adjusted so as to bring the actual output current value towards the preferred output current value.
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Arrowsmith Colin
Fallon Andrew
Creighton Wray James
KBO Dynamics International Limited
Shingleton Michael B
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