US3676705A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Logic circuits employing switches such as field-effect devices
Assignee: RCA Corp
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Filing: 1970-05-11
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Granted: 1972-07-11
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Expires: 1990-05-11
Abstract
Abstract A decoder employing switches such as metal oxide semiconductor (MOS) field-effect devices and diodes in a number of series circuits, each such circuit forming a ring. In the absence of strobe and strobe signals, one diode in one series circuit connects the decoder output terminal to ground. In the presence of strobe and strobe signals, the output terminal is disconnected from ground and, if the control voltages applied to certain of the devices in certain of the series circuits all represent the desired binary value, the strobe signal is conducted via certain of the devices in said one series path to said output terminal.
Inventors
- 👤 John Evert Meyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:44
CPC Classifications
H; H03; H03K; H03K19/00; H03K19/02; H03K19/08; H03K19/094; H03K19/096; H03K17/00; H03K17/51; H03K17/56; H03K17/687; H03K17/693; H03M; H03M7/00; H10; H10D; H10D86/00
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
204 words
In combination: a first circuit comprising n switches and a two electrode, asymmetrically conducting element, all connected in series, in a ring, where n is an integer greater than 1; an output terminal at one electrode of said element; means for normally applying to the other electrode of said element a bias in the forward direction for maintaining said output terminal at a reference level; n other circuits, each comprising a plurality of serially connected, normally open switches in series with one asymmetrically conducting element, in a ring; means for normally maintaining open the series connected switches in said first circuit via the asymmetrically conducting elements in said n circuits, respectively, comprising means for applying to one electrode of the element in each such circuit a forward voltage for transmission through that element to a switch in the first circuit; and means responsive to the concurrent application to said asymmetrically conducting elements of strobe signals of a polarity to reverse bias all such elements and to the closing of all of the normally open switches in said n circuits for closing the switches in said first circuit and applying a strobe signal through said closed switches of said first circuit to said output terminal.
Claim 2
Dependent Claim
204 words
In combination: a first circuit comprising n switches and a two electrode, asymmetrically conducting element, all connected in series, in a ring, where n is an integer greater than 1; an output terminal at one electrode of said element; means for normally applying to the other electrode of said element a bias in the forward direction for maintaining said output terminal at a reference level; n other circuits, each comprising a plurality of serially connected, normally open switches in series with one asymmetrically conducting element, in a ring; means for normally maintaining open the series connected switches in said first circuit via the asymmetrically conducting elements in said n circuits, respectively, comprising means for applying to one electrode of the element in each such circuit a forward voltage for transmission through that element to a switch in the first circuit; and means responsive to the concurrent application to said asymmetrically conducting elements of strobe signals of a polarity to reverse bias all such elements and to the closing of all of the normally open switches in said n circuits for closing the switches in said first circuit and applying a strobe signal through said closed switches of said first circuit to said output terminal.
Claim 3
Dependent Claim
15 words
In the combination as set forth in claim 1, said asymmetrically conducting elements comprising diodes.
Claim 4
Dependent Claim
14 words
In the combination as set forth in claim 2, said switches comprising field-effect transistors.
Claim 5
Dependent Claim
36 words
In the combination as set forth in claim 3, the switches in said first circuit comprising field-effect transistors of one conductivity type and the switches in the remaining paths comprising field-effect transistors of another conductivity type.
Claim 6
Dependent Claim
85 words
In the combination as set forth in claim 2, said switches in said first circuit comprising field-effect transistors, each having a conduction path and a control electrode, said conduction paths being connected in series; and said means for maintaining open the switches in said first circuit comprising means for applying a voltage level through the respective diodes in said n other circuits to the respective control electrodes of the field-effect transistors in said first circuit for maintaining said conduction paths in a high impedance state.
Claim 7
Dependent Claim
94 words
In the combination as set forth in claim 5, the switches in said n other circuits comprising field-effect transistors of opposite conductivity to those in the first circuit, each such transistor having a conduction path and a control electrode and the conduction paths in each such circuit being connected in series; and said means for closing the switches of said first circuit comprising means for applying a strobe signal through the conduction paths of the transistors in said n other circuits, respectively, to the respective control electrodes of the transistors in said first circuit.
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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) | 1975-07-11 | 1976-01-10 | 1976-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-11 | 1980-01-10 | 1980-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-11 | 1984-01-10 | 1984-07-11 | $7700.00 | Window Closed / Lapsed |