US3784924A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multi-input loop filter with independent bandwidth and response characteristics
Assignee: United States Department of the Navy
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Filing: 1972-01-31
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Granted: 1974-01-08
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Expires: 1992-01-31
Abstract
Abstract A single loop filter with multiple inputs and separate signal paths for each input using an operational amplifier with feedback capacitor connected in series with one or more damping resistors and having an input resistor associated with each damping resistor; the multiple input resistors achieving more than one bandwidth while the damping resistors maintain a desired damping factor for each input respectively.
Inventors
- 👤 H Mansnerus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 15:21
CPC Classifications
H; H03; H03H; H03H11/00; H03H11/02; H03H11/04; H03H11/12; H03H11/126; H03H11/36
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
179 words
An active single loop filter network with multiple inputs which operates under multiple signal control for accommodating a plurality of different and independent bandwidth input signals comprising: a. an operational amplifier having a single feedback loop; b. a plurality of feedback damping resistors connected in series for presenting various and independent damping Factors in said single feedback loop associated with different input bandwidths; c. a single feedback capacitor connected in said feedback loop in series with said damping resistors; d. a plurality of signal inputs; e. a plurality of input resistors each connected between a respective one of said signal inputs and a respective one of said damping resistors, each separate said input resistor connected in series with a respective one of said damping resistors such that each successive input resistor is also connected in series with all preceding feedback damping resistors and said feedback capacitor for permitting a corresponding plurality of different input and independent loop filter bandwidths to be accommodated for multiple signal control, said damping resistors maintaining the desired damping factor for each corresponding input respectively.
Claim 2
Dependent Claim
179 words
An active single loop filter network with multiple inputs which operates under multiple signal control for accommodating a plurality of different and independent bandwidth input signals comprising: a. an operational amplifier having a single feedback loop; b. a plurality of feedback damping resistors connected in series for presenting various and independent damping Factors in said single feedback loop associated with different input bandwidths; c. a single feedback capacitor connected in said feedback loop in series with said damping resistors; d. a plurality of signal inputs; e. a plurality of input resistors each connected between a respective one of said signal inputs and a respective one of said damping resistors, each separate said input resistor connected in series with a respective one of said damping resistors such that each successive input resistor is also connected in series with all preceding feedback damping resistors and said feedback capacitor for permitting a corresponding plurality of different input and independent loop filter bandwidths to be accommodated for multiple signal control, said damping resistors maintaining the desired damping factor for each corresponding input respectively.
Claim 3
Dependent Claim
167 words
A single loop filter network with multiple inputs which operates under multiple signal control for accommodating a plurality of different and independent bandwidth input signals, comprising: a. a plurality of damping resistors connected in series for presenting various and separate damping factors in said single loop network associated with different input bandwidths; b. a capacitor in said single loop network connected in series between said damping resistors and ground; c. a plurality of signal inputs; d. a plurality of input resistors each connected between a respective one of said signal inputs and a respective one of said damping resistors, each separate said input resistor connected in series with a respective one of said damping resistors such that each successive input resistor is also connected in series with all preceding damping resistors and said series capacitor for permitting a corresponding plurality of different input and loop filter bandwidths to be accommodated for multiple signal control, said damping resistors maintaining the desired damping factor for each corresponding input respectively.
Claim 4
Dependent Claim
167 words
A single loop filter network with multiple inputs which operates under multiple signal control for accommodating a plurality of different and independent bandwidth input signals, comprising: a. a plurality of damping resistors connected in series for presenting various and separate damping factors in said single loop network associated with different input bandwidths; b. a capacitor in said single loop network connected in series between said damping resistors and ground; c. a plurality of signal inputs; d. a plurality of input resistors each connected between a respective one of said signal inputs and a respective one of said damping resistors, each separate said input resistor connected in series with a respective one of said damping resistors such that each successive input resistor is also connected in series with all preceding damping resistors and said series capacitor for permitting a corresponding plurality of different input and loop filter bandwidths to be accommodated for multiple signal control, said damping resistors maintaining the desired damping factor for each corresponding input respectively.
References Cited (Backward Citations)
US3453554A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-01-07 | 1977-07-09 | 1978-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-07 | 1981-07-09 | 1982-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-07 | 1985-07-09 | 1986-01-08 | $7700.00 | Window Closed / Lapsed |