Apparatus and method for detecting and measuring changes in linear relationships between a number of high frequency signals
- Shoreham, NY
- Ridge, NY
An electronic measurement circuit for high speed comparison of the relative amplitudes of a predetermined number of electrical input signals independent of variations in the magnitude of the sum of the signals. The circuit includes a high speed electronic switch that is operably connected to receive on its respective input terminals one of said electrical input signals and to have its common terminal serve as an input for a variable-gain amplifier-detector circuit that is operably connected to feed its output to a common terminal of a second high speed electronic switch. The respective terminals of the second high speed electronic switch are operably connected to a plurality of integrating sample and hold circuits, which in turn have their outputs connected to a summing logic circuit that is operable to develop first, second and third output voltages, the first output voltage being proportional to a predetermined ratio of sums and differences between the compared input signals, the second output voltage being proportional to a second summed ratio of predetermined sums and differences between said input signals, and the third output voltage being proportional to the sum of signals to the summing logic circuit. A servo system that is operably connected to receive said third output signal and compare it with a reference voltage to develop a slowly varying feedback voltage to control the variable-gain amplifier in said common amplifier-detector circuit in order to make said first and second output signals independent of variations in the magnitude of the sum of said input signals.
- Research Organization:
- Associated Universities, Inc., Upton, NY (United States)
- DOE Contract Number:
- AC02-76CH00016
- Assignee:
- Associated Universities, Inc. (Washington, DC)
- Patent Number(s):
- US 5001416
- OSTI ID:
- 867747
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
method
detecting
measuring
changes
linear
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frequency
signals
electronic
measurement
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speed
comparison
relative
amplitudes
predetermined
electrical
input
independent
variations
magnitude
switch
operably
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receive
respective
terminals
common
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serve
variable-gain
amplifier-detector
feed
output
plurality
integrating
sample
hold
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summing
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voltages
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proportional
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sums
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summed
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slowly
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feedback
control
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predetermined ratio
output voltages
input terminal
feedback voltage
input terminals
frequency signals
common terminal
measurement circuit
electrical input
detector circuit
output voltage
output signals
input signals
output signal
input signal
reference voltage
operably connected
hold circuit
frequency signal
logic circuit
measuring changes
electronic switch
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