Amplitude and phase discriminator using all-pass networks
First Claim
1. A signal coupling network comprising:
- a first signal coupling stage havingfirst means for receiving a first input signal and for producing at a plurality of outputs thereof a plurality of first respective output signals, shifted in phase with respect to each other, andsecond means, coupled to the plurality of outputs of said first means, for selectively differentially combining said plurality of first output signals and producing therefrom a plurality of second output signals shifted in phase with respect to each other, at respective outputs thereof such that each of said second output signals is effectively phase-orthogonal with respect to another second output signal;
a second signal coupling stage havingthird means for receiving a second input signal producing at a plurality of outputs thereof a plurality of respective third output signals, shifted in phase with respect to each other, andfourth means, coupled to the plurality of outputs of said third means, for selectively differentially combining said plurality of third output signals and producing therefrom a plurality of fourth output signals shifted in phase with respect to each other, at respective outputs thereof such that each of said fourth output signals is effectively phase-orthogonal with respect to another fourth signal; and
a third signal coupling stage havingfifth means, coupled to said second and fourth means, for selectively combining said pluralities of second and fourth output signals and producing therefrom a plurality of fifth output signals each of which has a magnitude component representative of the magnitude of said first and second input signals, and a phase component representative of a prescribed relationship between the phases of said first and second input signals.
1 Assignment
0 Petitions
Accused Products
Abstract
An amplitude/phase discriminator network the entirety of which is integrated on the same (GaAs) semiconductor chip, obtains a quadrature phase split through the use of a pair of orthogonal phase generators each of which comprises an all-pass network coupled with a pair of differential amplifiers. An unknown signal of interest, the phase and amplitude of which are to be derived, is applied to one pair of all-pass networks, while a reference signal, the amplitude and phase of which are known, is applied to the other pair of all-pass networks. Four quadrature outputs produced by the differential amplifiers contained within the pair of orthogonal phase generators are selectively coupled to a signal combining stage comprised of a diode detector-low pass filter network. At the output of this network there are produced a set of output signals each of which has a magnitude component representative of the magnitudes of the unknown and reference signals and a phase component representative of the difference between the phases of the reference and unknown signals. Since the amplitude and phase of the reference signal are known, the amplitude and phase of the unknown signal can be readily determined.
-
Citations
9 Claims
-
1. A signal coupling network comprising:
-
a first signal coupling stage having first means for receiving a first input signal and for producing at a plurality of outputs thereof a plurality of first respective output signals, shifted in phase with respect to each other, and second means, coupled to the plurality of outputs of said first means, for selectively differentially combining said plurality of first output signals and producing therefrom a plurality of second output signals shifted in phase with respect to each other, at respective outputs thereof such that each of said second output signals is effectively phase-orthogonal with respect to another second output signal; a second signal coupling stage having third means for receiving a second input signal producing at a plurality of outputs thereof a plurality of respective third output signals, shifted in phase with respect to each other, and fourth means, coupled to the plurality of outputs of said third means, for selectively differentially combining said plurality of third output signals and producing therefrom a plurality of fourth output signals shifted in phase with respect to each other, at respective outputs thereof such that each of said fourth output signals is effectively phase-orthogonal with respect to another fourth signal; and a third signal coupling stage having fifth means, coupled to said second and fourth means, for selectively combining said pluralities of second and fourth output signals and producing therefrom a plurality of fifth output signals each of which has a magnitude component representative of the magnitude of said first and second input signals, and a phase component representative of a prescribed relationship between the phases of said first and second input signals. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
-
Specification
-
- Resources
-
Current AssigneeHarris Corporation (L3Harris Technologies, Inc.)
-
Original AssigneeHarris Corporation (L3Harris Technologies, Inc.)
-
InventorsRice, Christopher W., Salvage, Seward T.
-
Primary Examiner(s)Miller, Stanley D.
-
Assistant Examiner(s)Callahan, Timothy P.
-
Application NumberUS07/036,470Time in Patent Office635 DaysField of Search307/510-514, 307/516, 307/262, 328/55, 328/109, 328/133, 328/134, 328/155, 333/138, 333/139US Class Current327/238CPC Class CodesH03D 1/22 Homodyne or synchrodyne cir...
