US3577015A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Monostable multivibrator with low power reqirements
Assignee: Texas Instruments Inc
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Filing: 1968-12-30
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Granted: 1971-05-04
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Expires: 1988-12-30
Abstract
Abstract The invention disclosed is a monostable multivibrator circuit having first and second pairs of complementary transistors, with each pair connected collector-to-collector in series. The bases of the first pair of transistors are coupled to a first output terminal at the juncture between collectors of the second pair of transistors. The bases of the second pair of transistors are coupled to a second output terminal at the juncture between the collectors of the first pair of transistors. Terminals are provided for applying electrical power across the first and second pairs of transistors in order to maintain one transistor in each of the transistor pairs in a conductive state. A normally nonconductive trigger transistor is connected to the circuit for receiving a trigger signal in order to vary the state of each of the transistors for a preselected monostable timing period.
Inventors
- 👤 George W Niemann
- 👤 Robert A Stehlin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:59
CPC Classifications
H; H03; H03K; H03K3/00; H03K3/02; H03K3/26; H03K3/28; H03K3/281; H03K3/284
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
323 words
A triggered monostable multivibrator having a preselected timing period, comprising in combination: a. a first normally conducting transistor of one conductivity type having collector, emitter and base electrodes and a second normally nonconducting transistor of opposite conductivity type having collector, emitter and base electrodes, said first and second transistors being connected in series in a common collector configuration with their emitters being respectively connected to first and second voltage sources; b. a third normally conducting transistor of said one conductivity type having collector, emitter and base electrodes and a fourth normally nonconducting transistor of said opposite conductivity type having collector, emitter and base electrodes, said third and fourth transistors being connected in series in a common collector configuration with their emitters being respectively connected to said first and second voltage sources; c. an input transistor of said opposite conductivity type having collector, emitter and base electrodes with the emitter electrode thereof being connected to said second voltage source and with the base electrode thereof being coupled to a source of input signals; and d. first and second output means respectively connected to the common collectors of said first and second transistors and said third and fourth transistors; wherein e. the base electrode of said first transistor is AC coupled to said second output means and DC connected to said second voltage source; and wherein f. the base electrodes of said second and fourth transistors are respectively AC and DC coupled to said second and first output means; and wherein g. the base of said third transistor is AC and DC coupled to said first output means and AC coupled to the collector electrode of said input transistor; whereby h. when a trigger signal is coupled to said input transistor, said first, second, third and fourth transistors change Their conductive states and remain therein for said preselected timing period, whereupon said transistors return to their original conductive state to produce triggered monostable multivibrator operation.
Claim 2
Dependent Claim
323 words
A triggered monostable multivibrator having a preselected timing period, comprising in combination: a. a first normally conducting transistor of one conductivity type having collector, emitter and base electrodes and a second normally nonconducting transistor of opposite conductivity type having collector, emitter and base electrodes, said first and second transistors being connected in series in a common collector configuration with their emitters being respectively connected to first and second voltage sources; b. a third normally conducting transistor of said one conductivity type having collector, emitter and base electrodes and a fourth normally nonconducting transistor of said opposite conductivity type having collector, emitter and base electrodes, said third and fourth transistors being connected in series in a common collector configuration with their emitters being respectively connected to said first and second voltage sources; c. an input transistor of said opposite conductivity type having collector, emitter and base electrodes with the emitter electrode thereof being connected to said second voltage source and with the base electrode thereof being coupled to a source of input signals; and d. first and second output means respectively connected to the common collectors of said first and second transistors and said third and fourth transistors; wherein e. the base electrode of said first transistor is AC coupled to said second output means and DC connected to said second voltage source; and wherein f. the base electrodes of said second and fourth transistors are respectively AC and DC coupled to said second and first output means; and wherein g. the base of said third transistor is AC and DC coupled to said first output means and AC coupled to the collector electrode of said input transistor; whereby h. when a trigger signal is coupled to said input transistor, said first, second, third and fourth transistors change Their conductive states and remain therein for said preselected timing period, whereupon said transistors return to their original conductive state to produce triggered monostable multivibrator operation.
Claim 3
Dependent Claim
37 words
The triggered monostable multivibrator of claim 1 wherein said base electrode of said first transistor is AC coupled to said second output means through a capacitor, and DC connected to said second voltage source through a resistor.
Claim 4
Dependent Claim
35 words
The triggered monostable multivibrator of claim 1 wherein said base electrodes of said second and fourth transistors are respectively AC and DC coupled to said second and first output means through respective parallel RC circuits.
Claim 5
Dependent Claim
45 words
The triggered monostable multivibrator of claim 1 wherein said third transistor is AC and DC coupled to said first output means through a series-parallel RC circuit, and AC coupled to the collector electrode of said input transistor through the capacitor of said series-parallel RC circuit.
Claim 6
Dependent Claim
21 words
The triggered monostable multivibrator of claim 1 wherein said one conductivity type is PNP and said opposite conductivity type is NPN.
Claim 7
Dependent Claim
27 words
The triggered monostable multivibrator of claim 1 wherein said first and second transistors are matched complementary transistors and said third and fourth transistors are matched complementary transistors.
Claim 8
Dependent Claim
22 words
The triggered monostable multivibrator of claim 1 wherein said first voltage source is one volt and said second voltage source is ground.
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) | 1974-05-03 | 1974-11-02 | 1975-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-03 | 1978-11-02 | 1979-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-03 | 1982-11-02 | 1983-05-04 | $7700.00 | Window Closed / Lapsed |