US3747007A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable compensation for feedback control systems
Assignee: United States Department of the Army
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Filing: 1972-07-07
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Granted: 1973-07-17
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Expires: 1992-07-07
Abstract
Abstract The characteristics of a compensation network for an amplifier are varied in accordance with an electronic signal representing critical system parameters. A resistive reactive ''''T'''' branch is paralleled by a switching device and resistor. The parametric signal activates the switching device and the networks are connected between the input signal and an input of the amplifier.
Inventors
- 👤 K Geitner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 03:42
CPC Classifications
H; H03; H03F; H03F3/00; H03F3/72
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
186 words
A system comprising an amplifier having two inputs and at least one output; at least one feedback circuit connected between an output and an input of said amplifier; at least one input signal means; first and second networks connected between the signal means and the inputs of said amplifier; each network containing at least two parallel branches; one branch of each network containing a switching device in series therewith; said switching device each having a controlling input terminal; further signal means connected to the controlling input terminal of said switching devices so as to vary the characteristics of said networks; said first network consists of a first branch which is in the form of a resistive reactive ''''T'''' branch, a second branch is a pure resistive brAnch, and the third branch consisting of the series combination of said switching device and a resistor; and said second network consisting of a first pure resistive branch and a second branch containing said switching device and a resistor; and each branch being connected to a different input of said amplifier and connected to opposite sides of said signal means.
Claim 2
Independent Claim
186 words
A system comprising an amplifier having two inputs and at least one output; at least one feedback circuit connected between an output and an input of said amplifier; at least one input signal means; first and second networks connected between the signal means and the inputs of said amplifier; each network containing at least two parallel branches; one branch of each network containing a switching device in series therewith; said switching device each having a controlling input terminal; further signal means connected to the controlling input terminal of said switching devices so as to vary the characteristics of said networks; said first network consists of a first branch which is in the form of a resistive reactive ''''T'''' branch, a second branch is a pure resistive brAnch, and the third branch consisting of the series combination of said switching device and a resistor; and said second network consisting of a first pure resistive branch and a second branch containing said switching device and a resistor; and each branch being connected to a different input of said amplifier and connected to opposite sides of said signal means.
Claim 3
Dependent Claim
32 words
A system as set forth in claim 1 wherein said switching devices are switched in phase with each other; and the resistance of the two switching branches are equal to each other.
Claim 4
Independent Claim
112 words
A system comprising an amplifier having two inputs and at least one output; first and second feedback circuits connected between an output and an input of said amplifier; first and second input signal means; first and second networks connected respectively between said first and second signal means and the inputs of said amplifier; each network containing at least two parallel branches; one branch of each network containing a switching device in series therewith; said switching device each having a controlling input terminal; said networks being identical to each other; and further signal means connected to the controlling input terminals of said switching devices so as to vary the characteristics of said networks.
Claim 5
Independent Claim
112 words
A system comprising an amplifier having two inputs and at least one output; first and second feedback circuits connected between an output and an input of said amplifier; first and second input signal means; first and second networks connected respectively between said first and second signal means and the inputs of said amplifier; each network containing at least two parallel branches; one branch of each network containing a switching device in series therewith; said switching device each having a controlling input terminal; said networks being identical to each other; and further signal means connected to the controlling input terminals of said switching devices so as to vary the characteristics of said networks.
References Cited (Backward Citations)
US3629720A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-07-16 | 1977-01-15 | 1977-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-16 | 1981-01-15 | 1981-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-16 | 1985-01-15 | 1985-07-17 | $7700.00 | Window Closed / Lapsed |