Patent US3714460A successfully refreshed from Google Patents.
US3714460A
Expired / Lapsed
US
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Exclusive or circuit
Assignee: AT&T Inc
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Filing: 1971-09-10
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Granted: 1973-01-30
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Expires: 1991-09-10
Abstract
Abstract An exclusive OR circuit comprises a primary winding having two input terminals and being closely coupled to first and second secondary windings. Rectifying diodes are connected to adjacent ends of the first and second secondary windings, which are adjacent the center of the primary winding. This configuration transmits an output pulse through one of the diodes only upon the application of one input pulse to one of the input terminals, and gives high speed voltage cancellation if coincident pulses are applied. In another embodiment, transistors used in place of the diodes give signal gain.
Inventors
- 👤 W Clemetson
- 👤 K Kurokawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 17:12
CPC Classifications
H; H03; H03K; H03K19/00; H03K19/02; H03K19/12; H03K19/20; H03K19/21
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
170 words
An exclusive OR circuit suitable for use in systems using signal pulses having durations in the nanosecond range or less comprising: a primary winding having first and second ends to which first and second input signals may be applied; a balance detector circuit coupled to the primary winding; the detector circuit comprising a first secondary winding inductively coupled to and coextensive with a first part of the primary winding and a second secondary winding inductively coupled to and coextensive with a second part of the primary winding; first ends of the first and second secondary windings being closely adjacent a middle portion of the primary winding and being relatively remote from the first and second ends of the primary winding; second ends of the first and second secondary windings being relatively remote from the middle portion of the primary winding; the first ends of the first and second secondary windings being respectively connected to first and second rectifying diodes; said first and second rectifying diodes being connected to a load.
Claim 2
Dependent Claim
170 words
An exclusive OR circuit suitable for use in systems using signal pulses having durations in the nanosecond range or less comprising: a primary winding having first and second ends to which first and second input signals may be applied; a balance detector circuit coupled to the primary winding; the detector circuit comprising a first secondary winding inductively coupled to and coextensive with a first part of the primary winding and a second secondary winding inductively coupled to and coextensive with a second part of the primary winding; first ends of the first and second secondary windings being closely adjacent a middle portion of the primary winding and being relatively remote from the first and second ends of the primary winding; second ends of the first and second secondary windings being relatively remote from the middle portion of the primary winding; the first ends of the first and second secondary windings being respectively connected to first and second rectifying diodes; said first and second rectifying diodes being connected to a load.
Claim 3
Dependent Claim
170 words
An exclusive OR circuit suitable for use in systems using signal pulses having durations in the nanosecond range or less comprising: a primary winding having first and second ends to which first and second input signals may be applied; a balance detector circuit coupled to the primary winding; the detector circuit comprising a first secondary winding inductively coupled to and coextensive with a first part of the primary winding and a second secondary winding inductively coupled to and coextensive with a second part of the primary winding; first ends of the first and second secondary windings being closely adjacent a middle portion of the primary winding and being relatively remote from the first and second ends of the primary winding; second ends of the first and second secondary windings being relatively remote from the middle portion of the primary winding; the first ends of the first and second secondary windings being respectively connected to first and second rectifying diodes; said first and second rectifying diodes being connected to a load.
Claim 4
Dependent Claim
170 words
An exclusive OR circuit suitable for use in systems using signal pulses having durations in the nanosecond range or less comprising: a primary winding having first and second ends to which first and second input signals may be applied; a balance detector circuit coupled to the primary winding; the detector circuit comprising a first secondary winding inductively coupled to and coextensive with a first part of the primary winding and a second secondary winding inductively coupled to and coextensive with a second part of the primary winding; first ends of the first and second secondary windings being closely adjacent a middle portion of the primary winding and being relatively remote from the first and second ends of the primary winding; second ends of the first and second secondary windings being relatively remote from the middle portion of the primary winding; the first ends of the first and second secondary windings being respectively connected to first and second rectifying diodes; said first and second rectifying diodes being connected to a load.
Claim 5
Dependent Claim
27 words
In the exclusive OR circuit of claim 1 wherein: the first and second secondary windings each have one end connected to a diode and another end grounded.
Claim 6
Dependent Claim
48 words
The exclusive OR circuit of claim 2 wherein: the first secondary winding is intertwined with the first part of the primary winding, the second secondary winding is intertwined with the second part of the primary winding, and the primary and secondary windings are wound about a ferrite core.
Claim 7
Dependent Claim
28 words
The exclusive OR circuit of claim 3 wherein: the load is a two terminal load circuit having one terminal connected to the diodes and the other terminal grounded.
Claim 8
Dependent Claim
172 words
An exclusive OR circuit suitable for use in systems using signal pulses having durations in the nanosecond range or less comprising: a primary winding having first and second ends to which first and second input signals may be applied; a balanced detector circuit coupled to the primary winding; the detector circuit comprising a first secondary winding inductively coupled to and coextensive with a first part of the primary winding and a second secondary winding inductively coupled to and coextensive with a second part of the primary winding; first ends of the first and second secondary windings being closely adjacent a middle portion of the primary winding and being relatively remote from the first and second ends of the primary winding; second ends of the first and second secondary windings being relatively remote from the middle portion of the primary winding; the first ends of the first and second secondary windings being respectively connected to first and second rectifying barrier devices; said first and second rectifying barrier devices being connected to a load.
Claim 9
Dependent Claim
172 words
An exclusive OR circuit suitable for use in systems using signal pulses having durations in the nanosecond range or less comprising: a primary winding having first and second ends to which first and second input signals may be applied; a balanced detector circuit coupled to the primary winding; the detector circuit comprising a first secondary winding inductively coupled to and coextensive with a first part of the primary winding and a second secondary winding inductively coupled to and coextensive with a second part of the primary winding; first ends of the first and second secondary windings being closely adjacent a middle portion of the primary winding and being relatively remote from the first and second ends of the primary winding; second ends of the first and second secondary windings being relatively remote from the middle portion of the primary winding; the first ends of the first and second secondary windings being respectively connected to first and second rectifying barrier devices; said first and second rectifying barrier devices being connected to a load.
Claim 10
Dependent Claim
15 words
The exclusive OR circuit of claim 5 wherein: said rectifying barrier devices are rectifying diodes.
Claim 11
Dependent Claim
14 words
The exclusive OR circuit of claim 5 wherein: the rectifying barrier devices are transistors.
Claim 12
Dependent Claim
44 words
The exclusive OR circuit of claim 7 wherein: said transistors each comprise a base, collector, and emitter; the base of the first transistor is connected to the first secondary winding, and the base of the second transistor is connected to the second secondary winding.
Claim 13
Dependent Claim
51 words
The exclusive OR circuit of claim 8 wherein: a direct current base voltage is applied to the bases of the first and second transistors via the first and second secondary windings, respectively; and a collector voltage is applied to the collectors of the first and second transistors via a collector resistor.
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) | 1976-01-30 | 1976-07-31 | 1977-01-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-30 | 1980-07-31 | 1981-01-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-30 | 1984-07-31 | 1985-01-30 | $7700.00 | Window Closed / Lapsed |