Patent US3617869A successfully refreshed from Google Patents.
US3617869A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Circuitry for the production of a speed-proportional deflecting voltage
Assignee: Individual
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Filing: 1969-05-14
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Granted: 1971-11-02
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Expires: 1989-05-14
Abstract
Abstract A circuit for the generation of a deflecting voltage for the time-base deflection of an oscilloscope, which deflection is proportional to the speed of an engine and including a sawtooth generator controlled by the input pulses of a speed sensor on the engine. A variable attenuator regulates the slope of the sawtooth generator deflecting voltage so as to vary the frequency of the sawtooth voltage in accordance with the repetition rate of the engine ignition signals.
Inventors
- 👤 Reimar Germann
- 👤 Siegbert Haase
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:41
CPC Classifications
G; G01; G01R; G01R13/00; G01R13/20; G01R13/208; G01L; G01L23/00; G01L23/26; G01P; G01P3/00; G01P3/42; G01P3/44; G01P3/48; G01P3/4802
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
381 words
A circuitry for the generation of a deflecting voltage proportionate to the speed of an engine, for the time-base deflection of an oscilloscope, comprising a speed sensor mounted on the said engine and generating input pulses having a frequency proportionate to the speed of the engine, a circuit for the generation of a speed-proportionate direct-current voltage, the input of the said circuit being connected to the output of the said speed sensor, the said circuit having a first output generating trigger pulses of the same repetition sequence as the input pulses, and a second output generating the said speedproportionate direct-current voltage, a sawtooth generator whose input is connected to the first output of the said circuit, a variable attenuator connected to the second output of the said circuit, the output of said variable attenuator being connected to the said sawtooth generator, the said variable attenuator regulating the sweep slope of the sawtooth generator so as to provide a constant amplitude of the sawtooth voltage at all speeds of the engine, the said variable attenuator controls the charging voltage of the said sawtooth generator, the said variable attenuator comprising an operation amplifier having two difference inputs one of which is connected to the output of the said circuit generating the speed-proportionate direct-current voltage, a voltage attenuator connected to the output of the said operational amplifier and consisting of two partial resistances connected in series between the output of the operational amplifier and ground, the second difference input of the operational amplifier being connected to the said voltage attenuator between its two partial resistances, and an additional feedback control system for the control of the slope of the sawtooth voltage generated by the said sawtooth generator, the said feedback control system comprising a differentiating circuit whose input is connected to the output of the sawtooth generator to deliver a square wave amplitude which is proportional to the slope of the Sawtooth, a second operational amplifier having two difference inputs one of which is connected to the output of the said differentiating circuit, the second difference input being connected to the said voltage attenuator between its two partial resistances, the output of the said second operational amplifier being connected to the second difference input of the firstmentioned operational amplifier of the said variable attenuator.
Claim 2
Dependent Claim
381 words
A circuitry for the generation of a deflecting voltage proportionate to the speed of an engine, for the time-base deflection of an oscilloscope, comprising a speed sensor mounted on the said engine and generating input pulses having a frequency proportionate to the speed of the engine, a circuit for the generation of a speed-proportionate direct-current voltage, the input of the said circuit being connected to the output of the said speed sensor, the said circuit having a first output generating trigger pulses of the same repetition sequence as the input pulses, and a second output generating the said speedproportionate direct-current voltage, a sawtooth generator whose input is connected to the first output of the said circuit, a variable attenuator connected to the second output of the said circuit, the output of said variable attenuator being connected to the said sawtooth generator, the said variable attenuator regulating the sweep slope of the sawtooth generator so as to provide a constant amplitude of the sawtooth voltage at all speeds of the engine, the said variable attenuator controls the charging voltage of the said sawtooth generator, the said variable attenuator comprising an operation amplifier having two difference inputs one of which is connected to the output of the said circuit generating the speed-proportionate direct-current voltage, a voltage attenuator connected to the output of the said operational amplifier and consisting of two partial resistances connected in series between the output of the operational amplifier and ground, the second difference input of the operational amplifier being connected to the said voltage attenuator between its two partial resistances, and an additional feedback control system for the control of the slope of the sawtooth voltage generated by the said sawtooth generator, the said feedback control system comprising a differentiating circuit whose input is connected to the output of the sawtooth generator to deliver a square wave amplitude which is proportional to the slope of the Sawtooth, a second operational amplifier having two difference inputs one of which is connected to the output of the said differentiating circuit, the second difference input being connected to the said voltage attenuator between its two partial resistances, the output of the said second operational amplifier being connected to the second difference input of the firstmentioned operational amplifier of the said variable attenuator.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-11-01 | 1975-05-03 | 1975-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-01 | 1979-05-03 | 1979-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-01 | 1983-05-03 | 1983-11-02 | $7700.00 | Window Closed / Lapsed |