Electricity: measuring and testing – Determining nonelectric properties by measuring electric... – Beam of atomic particles
Patent
1990-03-05
1991-03-19
Wieder, Kenneth
Electricity: measuring and testing
Determining nonelectric properties by measuring electric...
Beam of atomic particles
250394, 324686, 328233, 328235, G01N 2700
Patent
active
050014161
ABSTRACT:
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.
REFERENCES:
patent: 3524998 (1970-08-01), Gilbert
patent: 3530241 (1970-09-01), Ellis
patent: 3857090 (1974-12-01), Chick
patent: 4524277 (1985-06-01), Shimura et al.
patent: 4607194 (1986-08-01), Yin
patent: 4686531 (1987-08-01), Shambroom et al.
patent: 4752728 (1988-06-01), Nakamura et al.
Biscardi Richard W.
Bittner John W.
Associated Universities Inc.
Bogosian Margaret C.
Mueller Robert W.
Myles Vale P.
Wieder Kenneth
LandOfFree
Apparatus and method for detecting and measuring changes in line does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Apparatus and method for detecting and measuring changes in line, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus and method for detecting and measuring changes in line will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2012641