Patent US3601626A successfully refreshed from Google Patents.
US3601626A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Logic element
Assignee: US Philips Corp
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Filing: 1969-02-26
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Granted: 1971-08-24
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Expires: 1989-02-26
Abstract
Abstract A digital logic element in which a single voltage supply provided current to an input circuit connected in series with a diode biased in the forward conduction region. Voltage for supplying part of a digital output circuit in the element is taken from the junction of the input circuit and the diodes.
Inventors
- 👤 Hans Hoffmann
- 👤 Ludwig Wittorf
- 👤 Hans-Wilhelm Neuhaus
- 👤 Uwe Bertram
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:10
CPC Classifications
H; H03; H03M; H03M7/00; H03M7/02; H03M7/06; H03M7/08; H03K; H03K19/00; H03K19/02; H03K19/08; H03K19/082
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
238 words
A logic element for use in a logic system having predetermined supply and signal voltages, comprising an input circuit, an output circuit and a voltage regulating circuit; said input circuit comprising an input terminal for receiving digital signals above and below a predetermined first voltage level, a first conduction path means connected to the input terminal for permitting current to flow therethrough in response to a voltage on the input terminal above a first voltage level and for preventing current from flowing therethrough in response to a voltage level on the input terminal below the first voltage level, a second conduction path means connected to the input terminal for permitting a current to flow therethrough in response to a voltage on the input terminal below the first voltage level and for preventing current from flowing therethrough in response to a voltage on the input terminal above the first voltage level, means for connecting one side of each conduction path means to the supply voltage of the logic system, and means for connecting the other sides of the conduction path means remote from the voltage supplied to a single point; said voltage regulating circuit comprising means for maintaining a constant voltage across the regulating circuit in response to variable currents passing therethrough; means for connecting the regulating circuit between the single point and ground; and means for connecting a part of the output circuit parallel with the regulating circuit.
Claim 2
Dependent Claim
238 words
A logic element for use in a logic system having predetermined supply and signal voltages, comprising an input circuit, an output circuit and a voltage regulating circuit; said input circuit comprising an input terminal for receiving digital signals above and below a predetermined first voltage level, a first conduction path means connected to the input terminal for permitting current to flow therethrough in response to a voltage on the input terminal above a first voltage level and for preventing current from flowing therethrough in response to a voltage level on the input terminal below the first voltage level, a second conduction path means connected to the input terminal for permitting a current to flow therethrough in response to a voltage on the input terminal below the first voltage level and for preventing current from flowing therethrough in response to a voltage on the input terminal above the first voltage level, means for connecting one side of each conduction path means to the supply voltage of the logic system, and means for connecting the other sides of the conduction path means remote from the voltage supplied to a single point; said voltage regulating circuit comprising means for maintaining a constant voltage across the regulating circuit in response to variable currents passing therethrough; means for connecting the regulating circuit between the single point and ground; and means for connecting a part of the output circuit parallel with the regulating circuit.
Claim 3
Dependent Claim
24 words
A logic circuit as claimed in claim 1, wherein the voltage maintained by the regulating circuit is approximately equal to the first voltage level.
Claim 4
Dependent Claim
18 words
A logic circuit as claimed in claim 1, wherein the regulating circuit comprises a constantly forward biased diode.
Claim 5
Dependent Claim
19 words
A logic circuit as claimed in claim 1, wherein the entire logic circuit is integrated in a semiconductor circuit.
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) | 1974-08-23 | 1975-02-22 | 1975-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-23 | 1979-02-22 | 1979-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-23 | 1983-02-22 | 1983-08-24 | $7700.00 | Window Closed / Lapsed |