US3239690A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transistor multivibrator circuit independent of supply variations
Assignee: AT&T Inc
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Filing: 1963-08-30
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Granted: 1966-03-08
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Expires: 1983-08-30
Abstract
No abstract record available.
Inventors
- 👤 Myron E Krom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:07
CPC Classifications
H; H03; H03K; H03K3/00; H03K3/02; H03K3/26; H03K3/28; H03K3/281; H03K3/282; H03K3/2823; H04; H04M; H04M3/00; H04M3/08; H04M3/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
103 words
A MULTIVIBRATOR CIRCUIT FOR GENERATING PREDETERMINED TIME INTERVALS SUBSTANTIALLY INDEPENDENT OF SUPPLY POTENTIALS INCLUDING FIRST TRANSISTOR TIMING MEANS; SECOND TRANSISTOR TIMING MEANS; BISTABLE MEANS COUPLED TO SAID FIRST AND SECOND TRANSISTOR TIMING MEANS; A POTENTIAL SOURCE COUPLED TO BOTH SAID TRANSISTOR TIMING MEANS; EACH SAID TRANSISTOR TIMING MEANS INCLUDING RESISTANCE MEANS AND CAPACITANCE DELAY MEANS, AND UNDIRECTIONAL CONDUCTING MEANS FOR CONTROLLING THE DISCHARGE OF SAID CAPACITANCE MEANS OVER A CONSTANT FRACTION OF SAID POTENTIAL SOURCE; AND MEANS IN SAID BISTABLE MEANS RESPONSIVE TO THE ENERGIZATION OF SAID FIRST TRANSISTOR TIMING MEANS TO DEENERGIZE SAID FIRST TIMING MEANS AND ENERGIZE SAID SECOND TIMING MEANS.
Claim 2
Dependent Claim
103 words
A MULTIVIBRATOR CIRCUIT FOR GENERATING PREDETERMINED TIME INTERVALS SUBSTANTIALLY INDEPENDENT OF SUPPLY POTENTIALS INCLUDING FIRST TRANSISTOR TIMING MEANS; SECOND TRANSISTOR TIMING MEANS; BISTABLE MEANS COUPLED TO SAID FIRST AND SECOND TRANSISTOR TIMING MEANS; A POTENTIAL SOURCE COUPLED TO BOTH SAID TRANSISTOR TIMING MEANS; EACH SAID TRANSISTOR TIMING MEANS INCLUDING RESISTANCE MEANS AND CAPACITANCE DELAY MEANS, AND UNDIRECTIONAL CONDUCTING MEANS FOR CONTROLLING THE DISCHARGE OF SAID CAPACITANCE MEANS OVER A CONSTANT FRACTION OF SAID POTENTIAL SOURCE; AND MEANS IN SAID BISTABLE MEANS RESPONSIVE TO THE ENERGIZATION OF SAID FIRST TRANSISTOR TIMING MEANS TO DEENERGIZE SAID FIRST TIMING MEANS AND ENERGIZE SAID SECOND TIMING MEANS.
References Cited (Backward Citations)
US3131317A
Cited
US3158757A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-03-07 | 1969-09-06 | 1970-03-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-07 | 1973-09-06 | 1974-03-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-07 | 1977-09-06 | 1978-03-08 | $7700.00 | Window Closed / Lapsed |