Patent US3838347A successfully refreshed from Google Patents.
US3838347A
Expired / Lapsed
US
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Apparatus for transforming a deteriorated input signal into a binary signal
Assignee: Zellweger Uster AG
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Filing: 1972-01-27
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Granted: 1974-09-24
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Expires: 1992-01-27
Abstract
Abstract A method of, and apparatus for, converting an analogue signal into a binary signal wherein the analogue signal is differentiated as a function of time, and a second analogue signal which is proportional to the derivative or first differential quotient as a function of time of the first analogue signal is formed from the differentiated signal. The second analogue signal is compared both with a positive as well as with a negative threshold value, and during the time of exceeding the positive threshold value until exceeding the negative threshold value there is formed a first type of binary signal and during the remaining time a second type of binary signal. If desired, the first and second analogue signals may be amplified.
Inventors
- 👤 H Lauffer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:02
CPC Classifications
G; G06; G06K; G06K7/00; G06K7/10; G06K7/10544; G06K7/10821; G06K7/10851; G06V; G06V10/00; G06V10/20; G06V10/28
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
344 words
An apparatus for producing a binary signal, comprising a differentiator for forming from a deteriorated input signal delivered thereto a second signal which is proportional to the first derivative as a function of time of the deteriorated input signal, threshold value means arranged in circuit with and following said differentiator, said threshold value means comparing the second signal with a positive threshold value and a negative threshold value, said threshold value means forming a binary signal having a first level which remains until the negative threshold value is exceeded at which time a second level of the binary signal is obtained, said threshold value means comprising a first differential amplifier, said first differential amplifier having an inverting input and a noninverting input, the second signal to be compared appearing at said non-inverting input, means for applying a positive voltage determining the positive threshold value to said inverting input of said differential amplifier, a second differential amplifier having an inverting input and a non-inverting input, the second signal to be compared appearing at said inverting input of said second differential amplifier, means for applying a negative voltage which determines the negative threshold value to the noninverting input of said second differential amplifier, said threshold value means further including a flip-flop circuit having a first input, a second input and an output, one of the inputs of said flip-flop circuit being connected with the output of said first differential amplifier, the other input of said flip-flop circuit being connected with the output of said second differential amplifier, the converter having an output, the output of said flip-flop being connected with the output of the converter, said flip-flop circuit having a further input, a timing element having an input side and an output side, the input side of said timing element being connected with said output of said flip-flop circuit and the output side of said timing element being connected with said further input of said flip-flop circuit whereby the flip-flop circuit switches to a rest position by a control pulse fed back through said timing element.
Claim 2
Independent Claim
344 words
An apparatus for producing a binary signal, comprising a differentiator for forming from a deteriorated input signal delivered thereto a second signal which is proportional to the first derivative as a function of time of the deteriorated input signal, threshold value means arranged in circuit with and following said differentiator, said threshold value means comparing the second signal with a positive threshold value and a negative threshold value, said threshold value means forming a binary signal having a first level which remains until the negative threshold value is exceeded at which time a second level of the binary signal is obtained, said threshold value means comprising a first differential amplifier, said first differential amplifier having an inverting input and a noninverting input, the second signal to be compared appearing at said non-inverting input, means for applying a positive voltage determining the positive threshold value to said inverting input of said differential amplifier, a second differential amplifier having an inverting input and a non-inverting input, the second signal to be compared appearing at said inverting input of said second differential amplifier, means for applying a negative voltage which determines the negative threshold value to the noninverting input of said second differential amplifier, said threshold value means further including a flip-flop circuit having a first input, a second input and an output, one of the inputs of said flip-flop circuit being connected with the output of said first differential amplifier, the other input of said flip-flop circuit being connected with the output of said second differential amplifier, the converter having an output, the output of said flip-flop being connected with the output of the converter, said flip-flop circuit having a further input, a timing element having an input side and an output side, the input side of said timing element being connected with said output of said flip-flop circuit and the output side of said timing element being connected with said further input of said flip-flop circuit whereby the flip-flop circuit switches to a rest position by a control pulse fed back through said timing element.
Claim 3
Dependent Claim
21 words
The apparatus as defined in claim 1, further including an amplifier stage connected forwardly of and in circuit with said differentiator.
Claim 4
Dependent Claim
16 words
The apparatus as defined in claim 2, wherein said amplifier stage functions as an impedance converter.
Claim 5
Dependent Claim
20 words
The apparatus as defined in claim 1, wherein said differentiator comprises a capacitor and a subsequently connected feedback amplifier stage.
Claim 6
Dependent Claim
16 words
The apparatus as defined in claim 1, further including an amplifier stage connected after said differentiator.
Claim 7
Dependent Claim
17 words
The apparatus as defined in claim 1, further including a low-pass filter in circuit with said differentiator.
Claim 8
Dependent Claim
17 words
The apparatus as defined in claim 6, wherein said low-pass filter is connected forwardly of said differentiator.
Claim 9
Dependent Claim
16 words
The apparatus as defined in claim 6, wherein said low-pass filter is connected following said differentiator.
References Cited (Backward Citations)
GB612371A
Cited
US3541508A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-09-23 | 1978-03-25 | 1978-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-23 | 1982-03-25 | 1982-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-23 | 1986-03-25 | 1986-09-24 | $7700.00 | Window Closed / Lapsed |