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Decode Method

IP.com Disclosure Number: IPCOM000092153D
Original Publication Date: 1968-Oct-01
Included in the Prior Art Database: 2005-Mar-05
Document File: 2 page(s) / 52K

Publishing Venue

IBM

Related People

Moore, RD: AUTHOR

Abstract

In this decoder, the emitters of multiemitter transistors are staggered so that they can be connected by a single straight connection. Decoders are difficult to fabricate in monolithic form because they require crossovers in their wiring as shown. These crossovers can be eliminated by using multiemitter transistors 10 with elongated base diffusions 12 to perform the And functions 14. With the elongated base diffusions 12, the emitter diffusions of different transistors that are to be connected together can be arranged in parallel lines. This permits the input lines 18 to run in parallel over the bases and be connected to an emitter diffusion at every point where the line is to be connected to a transistor.

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Decode Method

In this decoder, the emitters of multiemitter transistors are staggered so that they can be connected by a single straight connection. Decoders are difficult to fabricate in monolithic form because they require crossovers in their wiring as shown. These crossovers can be eliminated by using multiemitter transistors 10 with elongated base diffusions 12 to perform the And functions 14. With the elongated base diffusions 12, the emitter diffusions of different transistors that are to be connected together can be arranged in parallel lines. This permits the input lines 18 to run in parallel over the bases and be connected to an emitter diffusion at every point where the line is to be connected to a transistor.

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