Amplifiers – With traveling wave-type tube
Patent
1971-01-18
1976-02-10
Kaufman, Nathan
Amplifiers
With traveling wave-type tube
330 53, H03F 358
Patent
active
039380564
ABSTRACT:
Method and apparatus are described for reducing amplifier distortion by establishing a first signal at a first frequency to be amplified in an amplifier which while amplifying the first signal produces a second undesired signal at another frequency, producing on a cycle by cycle basis of the first signal a third signal at the other frequency, adjusting by no more than substantially 180.degree. the relative phase and amplitude of the first and third signals for mutual cancellation of the second and third signals and then amplifying the first signal in the amplifier and reducing the power of signals at the other frequency relative to the power of the amplifier signal at the first frequency. Examples are given where the second signal is a harmonic or an intermodulation frequency signal of the first signal.
REFERENCES:
patent: 3418605 (1968-12-01), Hair et al.
patent: 3426291 (1969-02-01), Waglein et al.
patent: 3440573 (1969-04-01), Butler
patent: 3566311 (1971-02-01), Buck
Kaufman Nathan
Teledyne Inc.
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