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US3899690A
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Control device detecting signal deviations from threshold values
Assignee: Arteche Instrumentacion y Sistemas Electronicos SA
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Filing: 1974-05-08
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Granted: 1975-08-12
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Expires: 1994-05-08
Abstract
Abstract A control device including first and second operators connected in parallel to a signal to be controlled through respective potentiometers or voltage dividers which adjust the respective threshold values of the system. One operator transmits a first response when the input signal exceeds a value corresponding to an upper threshold and another response when the input signal falls below that threshold. The second operator provides corresponding responses relative to a lower threshold of the input signal. The responses of the first and second operators are fed to a third operator whose control is at all times a function of the outputs of the first and second operators, the output of the third operator being used for control.
Inventors
- 👤 Llona Jose Luis Gomez
- 👤 Pietro Elizaran Rodolfo Di
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:30
CPC Classifications
G; G01; G01R; G01R19/00; G01R19/165; G01R19/16566; G01R19/1659
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
201 words
An electrical signal detection system for generating a control signal in response to variations of an input signal, comprising: first means (2) coupled to said input signal and providing a first signal which is a fraction of said input signal; second means (3) coupled to the output of said first means (2) and providing a second signal which is a fraction of said first signal of said first means (2); a first logic device (4) coupled to the output of said first means (2); a second logic device (5) coupled to the output of said second means (3); and a third logic device (6) having at least two inputs, two Inputs of which are respectively coupled to the outputs of said first and second logic devices (4,5) for generating (i) a first output signal when the two input signals coupled thereto coincide in time and are at identical first logic levels, and holding or maintaining said first output signal until the inputs thereto coincide in time and are of a second logic level, and (ii) generating a second output signal, distinctive from said first output signal, when said two input signals coincide in time and are of said second logic level.
Claim 2
Dependent Claim
201 words
An electrical signal detection system for generating a control signal in response to variations of an input signal, comprising: first means (2) coupled to said input signal and providing a first signal which is a fraction of said input signal; second means (3) coupled to the output of said first means (2) and providing a second signal which is a fraction of said first signal of said first means (2); a first logic device (4) coupled to the output of said first means (2); a second logic device (5) coupled to the output of said second means (3); and a third logic device (6) having at least two inputs, two Inputs of which are respectively coupled to the outputs of said first and second logic devices (4,5) for generating (i) a first output signal when the two input signals coupled thereto coincide in time and are at identical first logic levels, and holding or maintaining said first output signal until the inputs thereto coincide in time and are of a second logic level, and (ii) generating a second output signal, distinctive from said first output signal, when said two input signals coincide in time and are of said second logic level.
Claim 3
Dependent Claim
14 words
Apparatus according to claim 1 wherein said third logic device (6) has two inputs.
Claim 4
Dependent Claim
31 words
Apparatus according to claim 2 wherein said first means defines an upper threshold value of said input signal, and said second means define a lower threshold value of the input signal.
Claim 5
Dependent Claim
79 words
Apparatus according to claim 3 wherein the outputs of said first and second logic devices (4,5) are the same and at a first logic level when said input signal is below said lower threshold, and are the same and at a second logic level when said input signal is above said upper threshold, said outputs of said first and second logic devices (4,5) being different from each other when said input signal is between said upper and lower thresholds.
Claim 6
Dependent Claim
123 words
Apparatus according to claim 4 wherein said third logic device (6) generates said first output signal when both of the inputs thereto indicate that said input signal is below the lower threshold value, continues to generate said first output signal even when one of the inputs thereto changes, generates said second output signal when both input signals thereto indicate that said input signal is above the upper threshold value, continues to generate said second output signal even when one of the input signals thereto changes to indicate that said input signal has fallen below the upper threshold value but has not reached the lower threshold value, and again generates said first output signal when said input signal falls below said lower threshold value.
Claim 7
Dependent Claim
28 words
Apparatus according to claim 1 wherein said first and second means (2,3) comprise first and second potentiometers, respectively, for enabling variable settings of said fractions of said signals.
Claim 8
Dependent Claim
20 words
Apparatus according to claim 1 wherein said first and second means (2,3) are first and second voltage divider means, respectively.
Claim 9
Dependent Claim
16 words
Apparatus according to claim 1 wherein said first and second logic devices are respective NOR gates.
Claim 10
Dependent Claim
100 words
Apparatus according to claim 1 wherein said third logic device (6) comprises a first NOR gate (9) and a second NOR gate (11), the output of said first gate being coupled to one of the inputs of the second gate, and the output of the second gate being coupled to one of the inputs of the first gate, the outputs of said first and second logic devices being respectively coupled to other inputs of said first and second gates, the output of said third logic device coupled to the output of at least one of said first and second gates.
Claim 11
Dependent Claim
21 words
Apparatus according to claim 9 wherein said first and second logic devices (4,5) each respectively comprise at least one NOR gate.
Claim 12
Dependent Claim
63 words
Apparatus according to claim 10 wherein said third logic device further comprises third and fourth NOR gates (7,8) series connected between the output of said first logic device (4) and an input of said first NOR gate (9), and a fifth NOR gate (10) coupled between the output of said second logic device (5) and an input of said second NOR gate (11).
Claim 13
Dependent Claim
62 words
Apparatus according to claim 3 wherein said first means (2) determine an input signal fraction to set a first threshold value, and said second means (3) determine a fraction of the output of said first means to set a second threshold value which differs in value from said first threshold value by an amount corresponding to the setting of said second means.
Claim 14
Dependent Claim
31 words
Apparatus according to claim 12 wherein said first means simultaneously determines the levels of the first and second thresholds, the sEcond means setting the differential between the first and second thresholds.
References Cited (Backward Citations)
US3683284A
Cited
US3575608A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-08-11 | 1979-02-10 | 1979-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-11 | 1983-02-10 | 1983-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-11 | 1987-02-10 | 1987-08-12 | $7700.00 | Window Closed / Lapsed |