Constant-phase delay network

Details Constant-phase delay network Constant-phase delay network

1977-10-25

1979-05-29

Heyman, John S.

Modulators

Amplitude modulator

Nonlinear device controlled by modulating signal

328 55, 332 16R, H03D 306, H03K 5159

Patent

active

041568516

ABSTRACT:
A method of obtaining a constant-phase across a frequency band between points containing delay elements is shown. The delayed output is subtracted from the undelayed input in demodulators operating in quadrature to obtain quadrature phase-error signals. The phase-error signals are filtered and then additively modulated onto the delayed output with single-sideband techniques to correct the phase, thereby producing a delayed output signal that is in-phase with the undelayed signal.

REFERENCES:
patent: 3206686 (1965-09-01), Goor
patent: 3453552 (1969-07-01), Whang et al.
patent: 3546703 (1970-12-01), Kurth
patent: 3665328 (1972-05-01), Widl
patent: 4095185 (1978-06-01), Winters

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