Patent US3569743A successfully refreshed from Google Patents.
US3569743A
Expired / Lapsed
US
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Linear monostable multivibrator
Assignee: ATK Launch Systems LLC
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Filing: 1968-07-01
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Granted: 1971-03-09
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Expires: 1988-07-01
Abstract
Abstract A three transistor linear monostable multivibrator in which the time duration of the unstable condition thereof is linearely responsive to an applied control potential from which value a capacitor is charged from a constant current source to the potential at which the multivibrator switches to its stable condition.
Inventors
- 👤 Lee R Baessler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:05
CPC Classifications
H; H03; H03K; H03K3/00; H03K3/02; H03K3/26; H03K3/28; H03K3/281; H03K3/284
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
171 words
A linear monostable multivibrator comprising: a capacitor; first and second transistors having base, emitter, and collector electrodes, the collector electrode of said first transistor being connected to the base electrode of said second transistor through a resistor network, the collector electrode of said transistor being connected through said capacitor to the base electrode of said first transistor, said first transistor being biased to conduct in the stable condition of the multivibrator and said second transistor being biased to conduct in the unstable condition of the multivibrator; trigger means for causing the multivibrator to switch to its unstable condition; a source of constant current for charging said capacitor; means responsive to the accumulation of a predetermined charge on said capacitor for switching the multivibrator to its stable condition; and variable potential means for controlling the potential which said capacitor assumes upon the switching of the multivibrator to its unstable condition, the period of time of the unstable condition of the multivibrator being linearly related to the potential of said variable potential means.
Claim 2
Dependent Claim
171 words
A linear monostable multivibrator comprising: a capacitor; first and second transistors having base, emitter, and collector electrodes, the collector electrode of said first transistor being connected to the base electrode of said second transistor through a resistor network, the collector electrode of said transistor being connected through said capacitor to the base electrode of said first transistor, said first transistor being biased to conduct in the stable condition of the multivibrator and said second transistor being biased to conduct in the unstable condition of the multivibrator; trigger means for causing the multivibrator to switch to its unstable condition; a source of constant current for charging said capacitor; means responsive to the accumulation of a predetermined charge on said capacitor for switching the multivibrator to its stable condition; and variable potential means for controlling the potential which said capacitor assumes upon the switching of the multivibrator to its unstable condition, the period of time of the unstable condition of the multivibrator being linearly related to the potential of said variable potential means.
Claim 3
Independent Claim
179 words
The method of producing an output pulse having a predetermined width linearly related to an input potential comprising the steps of: a. providing a multivibrator including cross coupled transistors having base, collector and emitter electrodes and a capacitor connected between the base electrode of one of the transistors and the collector electrode of the other one of the transistors; b. charging the capacitor to a predetermined input potential during the stable condition of the multivibrator; c. switching the multivibrator to its unstable condition to remove the potential from one side of the capacitor; and d. charging the capacitor from the potential existing on the other side of the capacitor immediately after the switching of the multivibrator to its unstable condition to a predetermined potential at which the multivibrator switches to its stable condition from a constant current source whereby the potential to which the capacitor is charged during the stable condition of the multivibrator is linearly related to the time interval necessary to charge the capacitor to the predetermined switching potential and thus the width of the output pulse.
Claim 4
Independent Claim
179 words
The method of producing an output pulse having a predetermined width linearly related to an input potential comprising the steps of: a. providing a multivibrator including cross coupled transistors having base, collector and emitter electrodes and a capacitor connected between the base electrode of one of the transistors and the collector electrode of the other one of the transistors; b. charging the capacitor to a predetermined input potential during the stable condition of the multivibrator; c. switching the multivibrator to its unstable condition to remove the potential from one side of the capacitor; and d. charging the capacitor from the potential existing on the other side of the capacitor immediately after the switching of the multivibrator to its unstable condition to a predetermined potential at which the multivibrator switches to its stable condition from a constant current source whereby the potential to which the capacitor is charged during the stable condition of the multivibrator is linearly related to the time interval necessary to charge the capacitor to the predetermined switching potential and thus the width of the output pulse.
Claim 5
Dependent Claim
177 words
A linear monostable multivibrator comprising: a capacitor; first and second transistors having base, emitter, and collector electrodes, the collector electrode of said first transistor being connected to the base electrode of said second transistor through a resistor network, the collector electrode of said second transistor being connected through said capacitor to the base electrode of said first transistor, said first transistor being biased to conduct in the stable condition of the multivibrator and said second transistor being biased to conduct in the unstable condition of the multivibrator; trigger means for causing the multivibrator to switch to its unstable condition; a source of constant current for charging said capacitor through said second transistor; means responsive to the accumulation of a predetermined charge on said capacitor for switching the multivibrator to its stable condition; and means for conTrolling the potential which said capacitor assumes upon the switching of the multivibrator to its unstable condition whereby the time interval necessary to charge said capacitor to said predetermined potential and thus the width of the output pulse may be linearly controlled.
Claim 6
Dependent Claim
177 words
A linear monostable multivibrator comprising: a capacitor; first and second transistors having base, emitter, and collector electrodes, the collector electrode of said first transistor being connected to the base electrode of said second transistor through a resistor network, the collector electrode of said second transistor being connected through said capacitor to the base electrode of said first transistor, said first transistor being biased to conduct in the stable condition of the multivibrator and said second transistor being biased to conduct in the unstable condition of the multivibrator; trigger means for causing the multivibrator to switch to its unstable condition; a source of constant current for charging said capacitor through said second transistor; means responsive to the accumulation of a predetermined charge on said capacitor for switching the multivibrator to its stable condition; and means for conTrolling the potential which said capacitor assumes upon the switching of the multivibrator to its unstable condition whereby the time interval necessary to charge said capacitor to said predetermined potential and thus the width of the output pulse may be linearly controlled.
Claim 7
Dependent Claim
47 words
The linear monostable multivibrator of claim 3 wherein said charge responsive means includes a third transistor having base, emitter, and collector electrodes, the collector electrode of said second transistor being connected to the base electrode of said first transistor through the base-emitter junction of said third transistor.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-03-08 | 1974-09-07 | 1975-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-08 | 1978-09-07 | 1979-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-08 | 1982-09-07 | 1983-03-09 | $7700.00 | Window Closed / Lapsed |