US3657573A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Unipolar device with multiple channel regions of different cross section
Assignee: Telefunken Electronic GmbH
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Filing: 1969-08-28
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Granted: 1972-04-18
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Expires: 1989-08-28
Abstract
Abstract The invention relates to a unipolar device comprising a semi conductor body having a region of, for example, P or P -type conductivity which is traversed by channel-like regions of N-type conductivity having different cross sections. A control voltage applied across the PN-junctions thus formed so as to stress the junctions in the reverse direction will cause pinching off of the channel-like regions in the sequence of their increasing cross sections as the control voltage rises. The invention also includes circuitry by means of which this pinching off can be used to provide indications of the value of the control voltage where the channel-like regions each have a separate electrode. This circuitry includes branch circuits, each comprising an indicating element, which may be incandescent lamps and/or relay windings for the control of for the circuits, and a channel like region, connected in parallel across a voltage source.
Inventors
- 👤 Hans-Jurgen Maute
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:32
CPC Classifications
H; H10; H10D; H10D99/00; H10D48/00; H10D48/30; H10D48/32; H10D48/36; Y; Y10; Y10S; Y10S148/00; Y10S148/053; Y10S148/145
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
185 words
A unipolar device comprising: a plate-like semiconductor body having two opposed major surfaces, a region of a first type of conductivity extending to one major surface of said semiconductor body; a plurality of parallel channel-like regions of the opposite conductivity-type traversing said region of said first type of conductivity and individually extending to said one major surface of said body, said channel-like regions having different cross-sections with respect to one another; a connecting region adjacent the opposite one of said major surfaces of said semiconductor body and of said second type of conductivity for connecting said channel like regions together; a flat electrical contact positioned on said opposite one of said major surfaces of said semiconductor body for contacting said connecting region; a plurality of flat electrical contacts, one for contacting the end of a separate one of each said channel like regions, located on said one major surface of said semiconductor body for connecting said channels to separate loads; and, a flat electrical contact located on said one major surface of said semiconductor body for contacting said region of said first type of conductivity.
Claim 2
Dependent Claim
185 words
A unipolar device comprising: a plate-like semiconductor body having two opposed major surfaces, a region of a first type of conductivity extending to one major surface of said semiconductor body; a plurality of parallel channel-like regions of the opposite conductivity-type traversing said region of said first type of conductivity and individually extending to said one major surface of said body, said channel-like regions having different cross-sections with respect to one another; a connecting region adjacent the opposite one of said major surfaces of said semiconductor body and of said second type of conductivity for connecting said channel like regions together; a flat electrical contact positioned on said opposite one of said major surfaces of said semiconductor body for contacting said connecting region; a plurality of flat electrical contacts, one for contacting the end of a separate one of each said channel like regions, located on said one major surface of said semiconductor body for connecting said channels to separate loads; and, a flat electrical contact located on said one major surface of said semiconductor body for contacting said region of said first type of conductivity.
Claim 3
Dependent Claim
105 words
In combination, a unipolar device as defined in claim 1, with a circuit arrangement for the operation of said unipolar device, said circuit arrangement comprising means for Applying to the electrical contact for said region of said first type of conductivity a control voltage for stressing the PN-junctions between said region of said first conductivity and said channel like regions in the reverse direction, a supply voltage, indicating elements connected to said plurality of flat electrical contacts to provide branch circuits each including one of said indicating elements and a channel-like region, and means for connecting said branch circuits in parallel to said supply voltage.
Claim 4
Dependent Claim
35 words
The combination as defined in claim 2, wherein the indicating elements comprise the windings of relays for the control of further electrical circuits which are closed or opened through the switch contacts of said relays.
Claim 5
Dependent Claim
14 words
The combination as defined in claim 2, wherein the indicating elements comprise incandescent lamps.
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) | 1975-04-18 | 1975-10-18 | 1976-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-18 | 1979-10-18 | 1980-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-18 | 1983-10-18 | 1984-04-18 | $7700.00 | Window Closed / Lapsed |