Constant-phase delay network
First Claim
1. A method of maintaining a substantially constant phase relationship between the input and output signals of a portion of an energy transmission network containing delay elements producing a change in phase of the transmitted energy with respect to an input frequency thereof, including the steps of:
- comparing the input and output signals of the delay elements to obtain signals proportional to the phase difference appearing between the said input and output signals of the said delay elements;
filtering the said phase difference signals; and
additively modulating the said output signals of the said delay elements with the said filtered phase difference signals in order to produce a delayed output signal that is substantially in-phase with the input signal to the said delay elements.
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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.
17 Citations
6 Claims
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1. A method of maintaining a substantially constant phase relationship between the input and output signals of a portion of an energy transmission network containing delay elements producing a change in phase of the transmitted energy with respect to an input frequency thereof, including the steps of:
- comparing the input and output signals of the delay elements to obtain signals proportional to the phase difference appearing between the said input and output signals of the said delay elements;
filtering the said phase difference signals; and
additively modulating the said output signals of the said delay elements with the said filtered phase difference signals in order to produce a delayed output signal that is substantially in-phase with the input signal to the said delay elements. - View Dependent Claims (2, 3, 4, 5, 6)
- comparing the input and output signals of the delay elements to obtain signals proportional to the phase difference appearing between the said input and output signals of the said delay elements;
Specification