Electrical transmission or interconnection systems – Nonlinear reactor systems – Parametrons
Patent
1984-02-22
1985-05-28
Miller, Stanley D.
Electrical transmission or interconnection systems
Nonlinear reactor systems
Parametrons
307520, 307529, 307356, 328146, H03K 906, H03K 522, H03K 524
Patent
active
045203202
ABSTRACT:
Disclosed is an electronic circuit for determining the phase difference between an input signal and a reference signal where both signals are of the same frequency. Furthermore, the circuit provides an amplitude output indicative of the input signal even when that signal is obscured by noise. A chopper is supplied with the obscured signal input and a reference signal input and provides an output to an integrator which provides a control voltage for a voltage controlled phase shifter which supplies an out of phase input to the chopper. The input to the voltage controlled phase shifter is of the same frequency as the signal obscured by noise. A further output of the voltage controlled phase shifter is 90.degree. out of phase with respect to the reference supplied to the chopper and thus is in phase with the signal obscured by noise and provides the desired marker output. This marker output is also supplied as a reference to a second chopper which is also supplied with the obscured signal as an input. The output of the second chopper after suitable amplification, is proportional to the amplitude of the signal that is buried in noise. Thus, as long as the frequency of the signal buried in noise is known and supplied in the form of a reference signal, the phase and amplitude of the signal can be determined with the synchronous phase marker and amplitude detector.
REFERENCES:
patent: 3122704 (1964-02-01), Jones
patent: 3164777 (1965-01-01), Guanella
patent: 3588734 (1971-06-01), Welti
patent: 3737790 (1973-06-01), Brown
patent: 3758868 (1973-09-01), Brown
patent: 3764924 (1973-10-01), Caplan et al.
Robertson et al., "Synchronous Marker for Measuring Phase in the Presence Noise", Rev. Sci. Instrum., vol. 48, No. 10, Oct. 1977, pp. 1290-1294.
Potzick et al., "Voltage-Controlled Phase Shifter for Measuring Transfer Function in the Presence of Noise," Rev. Sci. Instrum., vol. 52, No. 2, Feb. 1981, pp. 280-286.
Potzick James E.
Robertson Baldwin
Callahan Timothy P.
Englert Alvin J.
Miller Stanley D.
Pawlikowski Eugene J.
Spooner Stanley C.
LandOfFree
Synchronous phase marker and amplitude detector does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Synchronous phase marker and amplitude detector, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Synchronous phase marker and amplitude detector will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-870968