US4091296A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Semiconductor R-S flip-flop circuit
Assignee: Toshiba Corp
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Filing: 1976-11-30
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Granted: 1978-05-23
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Expires: 1996-11-30
Abstract
Abstract A semiconductor R-S flip-flop circuit comprises first and second input terminals, first and second output terminals, a first integrated injection logic unit consisting of a first transistor acting as a switching element and a second transistor acting as an injector, and a second integrated injection logic unit consisting of a third transistor acting as a switching element and a fourth transistor acting as an injector. The R-S flip-flop circuit further includes a first diode having a cathode connected to the first input terminal and an anode connected to the base of the first transistor, a second diode having a cathode connected to the second input terminal and an anode connected to the base of the third transistor, a third diode having an anode connected to the base of the first transistor and a cathode connected to the collector of the third transistor, and a fourth diode having an anode connected to the base of the third transistor and a cathode connected to the collector of the first transistor.
Inventors
- 👤 Yasoji Suzuki
- 👤 Yukuya Tokumaru
- 👤 Masanori Nakai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:43
CPC Classifications
H; H03; H03K; H03K3/00; H03K3/02; H03K3/26; H03K3/28; H03K3/281; H03K3/286; H03K3/288
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
210 words
A semiconductor R-S flip-flop circuit comprising first and second input terminals; first and second output terminals; a first diode means having a cathode connected to the first input terminal and adapted to be rendered nonconductive when a "1" level signal is inputted to the first input terminal; a first switching transistor having a base connected to the anode of the first diode means and a first collector connected to the first output terminal; a first injector transistor constituting together with the first switching transistor an integrated injection logic unit; a second diode means having an anode connected to the base of the first switching transistor; a third diode means having a cathode connected to the second input terminal and adapted to be rendered nonconductive when a "1" level signal is inputted to the second input terminal; a fourth diode means having a cathode connected to a second collector of the first switching transistor; a second switching transistor having a base connected to the anode of the third and fourth diode means, a first collector connected to the second output terminal and a second collector connected to the cathode of the second diode means; and a second injector transistor constituting together with the second switching transistor an integrated injection logic circuit.
Claim 2
Dependent Claim
210 words
A semiconductor R-S flip-flop circuit comprising first and second input terminals; first and second output terminals; a first diode means having a cathode connected to the first input terminal and adapted to be rendered nonconductive when a "1" level signal is inputted to the first input terminal; a first switching transistor having a base connected to the anode of the first diode means and a first collector connected to the first output terminal; a first injector transistor constituting together with the first switching transistor an integrated injection logic unit; a second diode means having an anode connected to the base of the first switching transistor; a third diode means having a cathode connected to the second input terminal and adapted to be rendered nonconductive when a "1" level signal is inputted to the second input terminal; a fourth diode means having a cathode connected to a second collector of the first switching transistor; a second switching transistor having a base connected to the anode of the third and fourth diode means, a first collector connected to the second output terminal and a second collector connected to the cathode of the second diode means; and a second injector transistor constituting together with the second switching transistor an integrated injection logic circuit.
Claim 3
Dependent Claim
160 words
A semicondcutor R-S flip-flop circuit according to claim 1, further including a third output terminal on which a signal opposite in level to a signal on the first input terminal appears; a fourth output terminal on which a signal opposite in level to a signal on the second input terminal appears; a third switching transistor having a base connected to the anode of said first diode means, a first collector connected to the third output terminal and a second collector connected to the base of said first switching transistor; a third injector transistor constituting together with the third switching transistor an integrated injection logic unit; a fourth switching transistor having a base connected to the anode of said third diode means, a first collector connected to said fourth output terminal and a second collector connected to the base of said second switching transistor; and a fourth injector transistor constituting together with the fourth switching transistor an integrated injection logic unit.
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) | 1981-05-22 | 1981-11-21 | 1982-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-05-22 | 1985-11-21 | 1986-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-05-22 | 1989-11-21 | 1990-05-23 | $7700.00 | Window Closed / Lapsed |