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Title: Apparatus and method for detecting and measuring changes in linear relationships between a number of high frequency signals

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 tomore » 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.« less
Inventors:
 [1];  [2]
  1. (Shoreham, NY)
  2. (Ridge, NY)
Issue Date:
OSTI Identifier:
867747
Assignee:
Associated Universities, Inc. (Washington, DC) BNL
Patent Number(s):
US 5001416
Contract Number:
AC02-76CH00016
Research Org:
ASSOC UNIVERSITIES INC
Country of Publication:
United States
Language:
English
Subject:
apparatus; method; detecting; measuring; changes; linear; relationships; frequency; signals; electronic; measurement; circuit; speed; comparison; relative; amplitudes; predetermined; electrical; input; independent; variations; magnitude; switch; operably; connected; receive; respective; terminals; common; terminal; serve; variable-gain; amplifier-detector; feed; output; plurality; integrating; sample; hold; circuits; outputs; summing; logic; operable; third; voltages; voltage; proportional; ratio; sums; differences; compared; summed; servo; signal; compare; reference; slowly; varying; feedback; control; amplifier; 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; electronic measurement; hold circuits; /324/250/315/