Modulators – Amplitude modulator – Nonlinear device controlled by modulating signal
Patent
1980-09-04
1982-09-21
Grimm, Siegfried H.
Modulators
Amplitude modulator
Nonlinear device controlled by modulating signal
328 27, 328102, 328247, 330137, 330187, 455108, 455127, H03C 116, H03F 324, H03F 500
Patent
active
043509622
ABSTRACT:
An amplifier circuit incorporating a valve or vacuum tube in the grounded grid configuration is disclosed. The anode D.C. potential is greater than the cathode D.C. potential which is in turn greater than the grid D.C. potential. The cathode is switched at an R.F. rate to a further D.C. potential below that of the grid. Preferably the grid potential substantially cuts off cathode current flow with the switch open. The amplifier finds particular application as an output amplifier in an A.M. R.F. transmitter with the modulation being provided by high level anode modulation. The tube or valve can be a triode, tetrode, or pentode.
REFERENCES:
patent: 2603746 (1952-07-01), Burkhart et al.
patent: 2972110 (1961-02-01), Watters
patent: 3105196 (1963-09-01), Lerner
patent: 4058769 (1977-11-01), Alderman
Grimm Siegfried H.
T.B.C. Pty. Limited
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