摘要:
When a side of a hole formed in a layer of a semiconductor device is located on a slope of a step-like portion, the side of the hole is formed so that it has a wave shape. A conductor line traverses the wave side of the hole.
摘要:
A PROM device having the improved bit address decoders composed of a plurality of AND gates, each of the AND gates comprising PNP type transistors, to each base of which is applied an address signal from the bit address inverters. Each collector of these transistors is connected to ground, and each emitter is connected to the output terminal of the bit address decoder.
摘要:
A three-state output circuit is disclosed. The three-state output circuit is comprised of a phase-splitter transistor, a pull-up transistor and a pull-down transistor and further comprised of a control circuit which operates to make the transistors active or non-active. At least one of said transistors is connected to the control circuit via a newly employed PNP transistor through its emitter and base. The collector thereof is connected to a ground point of the three-state output circuit.
摘要:
A screw-in station protector assembly includes a carrier housing containing a shorting cage which is biased by a compression to urge the cage and gas tube arrester assembly outwardly. The gas tube assembly contained within the cage includes a two electrode gas tube. The gas tube is within a jacket which forms a sealed external back-up air gap protector. The screw-in-assembly is particularly adapted for retro-fitting/replacement of carbon block arresters without modification.
摘要:
A field programmable device comprises regular word lines, regular bit lines, regular memory cells connected at the intersections of the regular word lines and the regular bit lines, at least one test word line adjacent to one of the regular bit lines, and alternately arranged conducting and nonconducting test memory cells arranged at the intersections of the test bit lines and the regular word lines. According to the invention, for the purpose of determining poor insulation between the word lines, the test bit line and the regular word line are insulated by an insulating layer in each nonconducting test memory cell.
摘要:
A field programmable device comprising a memory cell part and a plurality of test bit rows provided along bit lines of the memory cell part and/or a plurality of test word rows provided along word lines of the memory cell part. At least one of the rows of the test bit and/or test word rows is written-in with a write-in ratio different than those of the other test bit and/or test word rows.
摘要:
A semiconductor memory device which writes information by rendering particular memory cells conductive or non-conductive, wherein, when a selected memory cell is to be read out, a power supply voltage is applied to the collector of a transistor which feeds a base current to a final stage transistor of a decoder circuit which is connected to word lines, and when information is to be written in, a voltage higher than the power supply voltage is applied to the same collector.
摘要:
A field programmable device having a memory cell member including regular bit lines, regular word lines, regular memory cells connected at the cross points of said regular bit lines and regular word lines, test bit or test word lines, and non-conductive and conductive test memory cells connected at the cross points of said regular bit or regular word lines and test word or test bit lines, wherein the conductivity of a test memory cell is determined by the "1" or "0" of the address signal by which the test word or test bit line to which the test memory cell is connected is selected.
摘要:
A semiconductor memory device includes a plurality of memory cells arranged in a matrix form and a decoder circuit selecting a row of the matrix in response to an address signal. The decoder circuit includes a first-stage decoder having a plurality of first-stage decoding elements and a second-stage decoder having a plurality of second-stage decoding elements. Each first-stage decoding element is connected to a plurality of second-stage decoding elements. Each of the first-stage decoding elements receives predetermined higher bits of the address signals. One of the first-stage decoding elements is selected upon one access command. Each of the plurality of second-stage decoding elements receives the address signals. One of the rows of the matrix is selected in response to the the address signals when the corresponding first-stage decoding element operates, whereby the power consumption is reduced.
摘要:
A PROM (programmable read-only memory) device includes both PROM cells and peripheral circuits cooperating therewith with the PROM cells and peripheral circuits formed in and on the same bulk. The bulk is formed free of metal which acts as a life time killer. Further, in each of the PROM cells, a buffer layer made of a silicon semiconductor, is introduced between a metal electrode, acting as a bit line, and the surface of the bulk at the position where the PROM cell is formed. Furthermore, the peripheral circuits are made by using Schottky TTL (transistor transistor logic) circuits.