Wave transmission lines and networks – Automatically controlled systems – With control of equalizer and/or delay network
Patent
1975-03-27
1976-06-22
Gensler, Paul L.
Wave transmission lines and networks
Automatically controlled systems
With control of equalizer and/or delay network
328133, 333 18, H03B 304
Patent
active
039654338
ABSTRACT:
Apparatus for accomplishing phase equalization between two signal components derived from a common source includes circuitry for generating the sum and the difference of the two signal components and for deriving an error signal from the envelopes of the sum and difference. The error signal is mixed in a first mixer with the envelope of the sum signal and mixed in a second mixer with an envelope of an original signal from which the two input signal components to be phase equalized are derived. The output of the first mixer is applied to a phase adjuster which adjusts the phase of one signal component to be phase equalized so that desired phase equality is maintained between the two signal components. The output of the second mixer controls the gain of an amplifier which amplifies the envelope of the original input signal. A particular application of the invention is in a LIND (linear amplification using nonlinear devices) amplifier such as disclosed in U.S. Pat. No. 3,777,275 issued Dec. 4, 1973 to D. C. Cox.
REFERENCES:
patent: 3436647 (1969-04-01), Gobeli et al.
patent: 3777275 (1973-12-01), Cox
Bell Telephone Laboratories Incorporated
Dubosky Daniel D.
Gensler Paul L.
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