US3667057A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and means for providing an output corresponding to the average of acceptable input signals
Assignee: Bendix Corp
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Filing: 1970-05-22
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Granted: 1972-05-30
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Expires: 1990-05-22
Abstract
Abstract A circuit has averaging means for providing an output corresponding to the average acceptable input signals, a comparator for comparing each input signal to the average output, and switching means controlled by the comparator for eliminating unacceptable input signal from the average when the signals differ a predetermined amount from the average output.
Inventors
- 👤 George H Pfersch Jr
- 👤 Jerry Doniger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 05:21
CPC Classifications
H; H03; H03K; H03K19/00; H03K19/003; H03K19/00392; G; G01; G01R; G01R19/00; G01R19/003; G06; G06G; G06G7/00; G06G7/12; G06G7/14
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
449 words
A circuit for providing an output corresponding to the average of acceptable input signals and for eliminating unacceptable input signals which differ from the average by a predetermined amount, comprising averaging means responsive to the input signals for providing an output corresponding to the average of acceptable input signals, means connected to the output of the averaging means for comparing each input signal to the average output, switching means included in the averaging means connected to the comparing means for eliminating unacceptable input signals from the averaging means when the input signals differ a predetermined amount from the average output and said averaging means further including means receiving the input signals and connected to said switching means for reducing each acceptable input signal by a factor of 1/N, where N is the number of acceptable input signals, and applying the reduced acceptable signals and the unacceptable signals to the switching means which is rendered conductive by the comparing means to pass the reduced acceptable signals and rendered nonconductive by the comparing means to block the unacceptable signals; the averaging means still further including summing means connected to the switching means for summing reduced signals passed by the switching means and providing the average output; said summing means includes amplifying means for amplifying the sum signal to provide the average output; and wherein the switching means is a plurality of individual switching means for each of said input signals having first and second terminals, and the amplifying means includes an operational amplifier for amplifying the average of a number of acceptable input signals having its input terminal connected to the first terminals of all the switching means, input and output circuits for said amplifier, said input circuit comprising a first plurality of resistors, each being connected to the second terminal of its respective switching means for receiving individually a respective input signal, and said output circuit comprising a second plurality of resistors, each being connected to the output terminal of the amplifier and to the second terminal of its respective switching means to operate as a feedback resistor for said amplifier when said switching means is rendered conductive and not to operate as a feedback resistor when said switching means is rendered non-conductive to maintain the gain of said amplifier constant with varying number of acceptable input signal, and to provide in combination with a respective resistor of the first plurality of resistors a reduction in the amplitude of its respective input signal when said switching means is conductive, and an increase in the amplitude of each acceptable signal when said switching means is rendered non-conductive so as to maintain an average of acceptable signals irrespective of the number thereof.
Claim 2
Dependent Claim
449 words
A circuit for providing an output corresponding to the average of acceptable input signals and for eliminating unacceptable input signals which differ from the average by a predetermined amount, comprising averaging means responsive to the input signals for providing an output corresponding to the average of acceptable input signals, means connected to the output of the averaging means for comparing each input signal to the average output, switching means included in the averaging means connected to the comparing means for eliminating unacceptable input signals from the averaging means when the input signals differ a predetermined amount from the average output and said averaging means further including means receiving the input signals and connected to said switching means for reducing each acceptable input signal by a factor of 1/N, where N is the number of acceptable input signals, and applying the reduced acceptable signals and the unacceptable signals to the switching means which is rendered conductive by the comparing means to pass the reduced acceptable signals and rendered nonconductive by the comparing means to block the unacceptable signals; the averaging means still further including summing means connected to the switching means for summing reduced signals passed by the switching means and providing the average output; said summing means includes amplifying means for amplifying the sum signal to provide the average output; and wherein the switching means is a plurality of individual switching means for each of said input signals having first and second terminals, and the amplifying means includes an operational amplifier for amplifying the average of a number of acceptable input signals having its input terminal connected to the first terminals of all the switching means, input and output circuits for said amplifier, said input circuit comprising a first plurality of resistors, each being connected to the second terminal of its respective switching means for receiving individually a respective input signal, and said output circuit comprising a second plurality of resistors, each being connected to the output terminal of the amplifier and to the second terminal of its respective switching means to operate as a feedback resistor for said amplifier when said switching means is rendered conductive and not to operate as a feedback resistor when said switching means is rendered non-conductive to maintain the gain of said amplifier constant with varying number of acceptable input signal, and to provide in combination with a respective resistor of the first plurality of resistors a reduction in the amplitude of its respective input signal when said switching means is conductive, and an increase in the amplitude of each acceptable signal when said switching means is rendered non-conductive so as to maintain an average of acceptable signals irrespective of the number thereof.
Claim 3
Dependent Claim
351 words
A circuit for providing an output corresponding to the average of acceptable input signals and for eliminating unacceptable input signals which differ from the average by a predetermined aMount, comprising averaging means responsive to the input signals for providing an output corresponding to the average of acceptable input signals, means connected to the output of the averaging means for comparing each input signal to the average output, switching means included in the averaging means connected to the comparing means for eliminating unacceptable input signals from the averaging means when the input signals differ a predetermined amount from the average output and said averaging means further including means receiving the input signals and connected to said switching means for reducing each acceptable input signal by a factor of 1/N, where N is the number of acceptable input signals, and applying the reduced acceptable signals and the unacceptable signals to the switching means which is rendered conductive by the comparing means to pass the reduced acceptable signals and rendered non-conductive by the comparing means to block the unacceptable signals; the comparing means includes a plurality of comparators, each comparator being connected to the switching means and to the averaging means and receiving a different input signal and comparing the input signal with the average output from the averaging means for controlling the switching means in accordance with the comparison; and further comprising means for controlling the switching means to eliminate an input signal that was an unacceptable signal for a predetermined time interval and including a plurality of delay circuits, each delay circuit being connected to a different comparator and controlled by the comparator to provide an output when the input signal differs from the average output by a predetermined amount for a predetermined time; a plurality of flip-flops, each flip-flop connecting a corresponding delay circuit to the switching means and responsive to an output from the delay circuit to control the switching means to eliminate the input signal that differed from the average output by the predetermined amount for the predetermined time, and means connected to the flip-flops for resetting the flip-flops.
Claim 4
Dependent Claim
351 words
A circuit for providing an output corresponding to the average of acceptable input signals and for eliminating unacceptable input signals which differ from the average by a predetermined aMount, comprising averaging means responsive to the input signals for providing an output corresponding to the average of acceptable input signals, means connected to the output of the averaging means for comparing each input signal to the average output, switching means included in the averaging means connected to the comparing means for eliminating unacceptable input signals from the averaging means when the input signals differ a predetermined amount from the average output and said averaging means further including means receiving the input signals and connected to said switching means for reducing each acceptable input signal by a factor of 1/N, where N is the number of acceptable input signals, and applying the reduced acceptable signals and the unacceptable signals to the switching means which is rendered conductive by the comparing means to pass the reduced acceptable signals and rendered non-conductive by the comparing means to block the unacceptable signals; the comparing means includes a plurality of comparators, each comparator being connected to the switching means and to the averaging means and receiving a different input signal and comparing the input signal with the average output from the averaging means for controlling the switching means in accordance with the comparison; and further comprising means for controlling the switching means to eliminate an input signal that was an unacceptable signal for a predetermined time interval and including a plurality of delay circuits, each delay circuit being connected to a different comparator and controlled by the comparator to provide an output when the input signal differs from the average output by a predetermined amount for a predetermined time; a plurality of flip-flops, each flip-flop connecting a corresponding delay circuit to the switching means and responsive to an output from the delay circuit to control the switching means to eliminate the input signal that differed from the average output by the predetermined amount for the predetermined time, and means connected to the flip-flops for resetting the flip-flops.
Claim 5
Dependent Claim
39 words
A circuit of the kind described in claim 2, further comprising a plurality of indicators, each indicator being connected to a corresponding flip-flop and providing an indication when the flip-flop controls the switching means to eliminate the input signal.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-05-30 | 1975-11-29 | 1976-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-30 | 1979-11-29 | 1980-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-30 | 1983-11-29 | 1984-05-30 | $7700.00 | Window Closed / Lapsed |