US3906259A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pulse amplitude detector
Assignee: United States Department of the Army
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Filing: 1974-02-05
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Granted: 1975-09-16
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Expires: 1994-02-05
Abstract
Abstract An operational amplifier is equipped with peak selection circuits whereby the difference between adjustable dc voltage and a selected upper portion of an input pulse is amplified.
Inventors
- 👤 John F Nicholas
- 👤 Edward A Salvagni
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:54
CPC Classifications
H; H03; H03K; H03K5/00; H03K5/01; H03K5/08
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
166 words
The system comprising an operational amplifier having first and second inputs and an output; a reference voltage means; first means connecting the reference voltage means to said first input of said amplifier; an input signal; second means connecting said input signal to the second input of said amplifier; first and second diodes being connected respectively between said reference voltage means and said first means, and said input signal and said second means; a first resistor having a first side connected between the first diode and said first means and a second side connected between the second diode and said second means so that said input signal will have no effect on the operation of the amplifier until it exceeds a predetermined value; a second resistor connected between the output of said amplifier and said first input of said amplifier; said second means being a third resistor; said first means being a fourth resistor; and said third and fourth resistors being equal in resistance to each other.
Claim 2
Independent Claim
166 words
The system comprising an operational amplifier having first and second inputs and an output; a reference voltage means; first means connecting the reference voltage means to said first input of said amplifier; an input signal; second means connecting said input signal to the second input of said amplifier; first and second diodes being connected respectively between said reference voltage means and said first means, and said input signal and said second means; a first resistor having a first side connected between the first diode and said first means and a second side connected between the second diode and said second means so that said input signal will have no effect on the operation of the amplifier until it exceeds a predetermined value; a second resistor connected between the output of said amplifier and said first input of said amplifier; said second means being a third resistor; said first means being a fourth resistor; and said third and fourth resistors being equal in resistance to each other.
Claim 3
Dependent Claim
80 words
A system as set forth in claim 1 wherein said voltage reference means is adjustable and has a connection to ground; a fifth resistor connected between the second input of the amplifier and ground; a sixth resistor connected between first and third resistors and ground; said second and fifth resistors being equal to each other in resistance; and said fourth resistor being much greater than said sixth resistor which in turn is much greater in resistance to said first resistor.
Claim 4
Dependent Claim
76 words
A system as set forth in claim 2 further comprising a seventh resistor connected between said first and fourth resistors and ground; said reference voltage means being a dc adjustable reference voltage; said diodes being connected such that said reference voltage will apply a back biased voltage on said second diode when said input signal is below a predetermined value; and said amplifier linearly amplifying the portion of said input signal which exceeds said predetermined value.
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) | 1978-09-15 | 1979-03-17 | 1979-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-15 | 1983-03-17 | 1983-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-15 | 1987-03-17 | 1987-09-16 | $7700.00 | Window Closed / Lapsed |