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US3626208A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Double-pole double-throw diode switch
Assignee: AT&T Inc
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Filing: 1969-10-21
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Granted: 1971-12-07
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Expires: 1989-10-21
Abstract
Abstract A reversing gate that allows the exchange of two radio frequency signal inputs between each of two outputs in response to a direct current switch command. Eight diodes are arranged in pairs in a bridge so that the ON pairs back bias OFF pairs thus simplifying the driving currents required. A plurality of gates can be compounded to achieve more complicated switching functions.
Inventors
- 👤 Richard T Cooney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 12:35
CPC Classifications
H; H03; H03K; H03K17/00; H03K17/51; H03K17/74
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
94 words
A switching network comprising a bridge network having two pairs of opposite arms interconnecting four vertexes, a pair of oppositely poled asymmetrically conducting devices included in each arm, means for selectively applying a forward biasing potential simultaneously to both devices in each of one pair of said opposite arms, and impedance means connected from a common potential point to each of said vertexes for developing back bias potential for both devices in each of the other pair of opposite arms in response to said forward bias applied to said one pair of opposite arms.
Claim 2
Dependent Claim
94 words
A switching network comprising a bridge network having two pairs of opposite arms interconnecting four vertexes, a pair of oppositely poled asymmetrically conducting devices included in each arm, means for selectively applying a forward biasing potential simultaneously to both devices in each of one pair of said opposite arms, and impedance means connected from a common potential point to each of said vertexes for developing back bias potential for both devices in each of the other pair of opposite arms in response to said forward bias applied to said one pair of opposite arms.
Claim 3
Dependent Claim
27 words
The network of claim 1 including a pair of input circuits connected to diametrically opposite vertexes and a pair of output circuits connected to the remaining vertexes.
Claim 4
Dependent Claim
32 words
The network of claim 1 wherein said impedance means comprises the series combination of a resistor and inductor connected between each of said vertexes and the other pole of said potential source.
Claim 5
Dependent Claim
49 words
The network according to claim 1 in combination with at least three further bridge arms each like the arms of said network, said further arms being connected to one of the arms of said network to form a further four-arm bridge which shares said one arm with said network.
Claim 6
Dependent Claim
118 words
A switching network for connecting each of two input circuits alternatively to respective ones of two output circuits comprising a four-arm bridge network having four vertexes each connected to one of said circuits, each arm comprising a pair of asymmetrically conducting devices having like terminals connected together at a center point on the arm, means for selectively applying a forward biasing potential simultaneously to center points of opposite arms for both said devices in said opposite arms, and impedance means connected from a common potential point to each of said vertexes for developing back bias potential for both said devices in arms adjacent to said opposite arms in response to said forward bias applied to said opposite arms.
Claim 7
Dependent Claim
118 words
A switching network for connecting each of two input circuits alternatively to respective ones of two output circuits comprising a four-arm bridge network having four vertexes each connected to one of said circuits, each arm comprising a pair of asymmetrically conducting devices having like terminals connected together at a center point on the arm, means for selectively applying a forward biasing potential simultaneously to center points of opposite arms for both said devices in said opposite arms, and impedance means connected from a common potential point to each of said vertexes for developing back bias potential for both said devices in arms adjacent to said opposite arms in response to said forward bias applied to said opposite arms.
Claim 8
Dependent Claim
131 words
A switching network for connecting each of two input circuits alternatively to respective ones of two output circuits comprising a four-arm bridge network having four vertexes each connected to one of said circuits, each arm comprising a pair of asymmetrically conducting devices having like terminals connected together at a center point on the arm, a source of potential and impedance means for connecting said source to each of said center points, means for selectively grounding the center points of one pair of opposite arms, and impedance means connected from a common potential point to each of said vertexes for developing back bias potential for devices in said one pair of opposite arms in response to forward bias current flowing from said source through devices in the other pair of opposite arms.
Claim 9
Dependent Claim
131 words
A switching network for connecting each of two input circuits alternatively to respective ones of two output circuits comprising a four-arm bridge network having four vertexes each connected to one of said circuits, each arm comprising a pair of asymmetrically conducting devices having like terminals connected together at a center point on the arm, a source of potential and impedance means for connecting said source to each of said center points, means for selectively grounding the center points of one pair of opposite arms, and impedance means connected from a common potential point to each of said vertexes for developing back bias potential for devices in said one pair of opposite arms in response to forward bias current flowing from said source through devices in the other pair of opposite arms.
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) | 1974-12-06 | 1975-06-07 | 1975-12-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-06 | 1979-06-07 | 1979-12-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-06 | 1983-06-07 | 1983-12-07 | $7700.00 | Window Closed / Lapsed |