AND gate

About: AND gate is a research topic. Over the lifetime, 11860 publications have been published within this topic receiving 109726 citations.

Time split array logic element and method of operation

Abstract: A standard logic array can be electrically altered at different time intervals to execute complex logic functions. Input variables to the array are processed in a network to generate sets of implicants of a complex function in one or more time periods. The implicants constituting the function are processed through a logic network or matrix as the logic personality of the matrix is altered. The implicant and logic networks may be personalized by (a) structure, (b) time signals, (c) personality signals, and (d) any combination of (a), (b) and (c). The standard array executes complex functions in a single time period or by processing one or more implicants in groups at different time periods. The testability of the array may be improved by appropriate interconnections of the array elements. The invention reduces the number of logic elements or part numbers a system designer must assemble to achieve desired objectives for a data processing machine. The arrays can be produced, stockpiled and structurally personalized at a later time as required by a system designer. The method of operating the array is compatible with data processing machine programming and operation.

Analog Noise Reduction in Enzymatic Logic Gates

Abstract: In this work we demonstrate both experimentally and theoretically that the analog noise generation by a single enzymatic logic gate can be dramatically reduced to yield gate operation with virtually no input noise amplification. This is achieved by exploiting the enzyme's specificity when using a co-substrate that has a much lower affinity than the primary substrate. Under these conditions, we obtain a negligible increase in the noise output from the logic gate as compared to the input noise level. Experimental realizations of the AND logic gate with the enzyme horseradish peroxidase using hydrogen peroxide and two different co-substrates, 2,2'-azino-bis(3-ethylbenzthiazoline-6-sulphonic acid) (ABTS) and ferrocyanide, with vastly different rate constants confirmed our general theoretical conclusions.

All-optical digital 3-input AND gate using sum- and difference-frequency generation in a PPLN waveguide

Abstract: We demonstrate an all-optical bit-wise 3-input AND gate using a single periodically-poled-lithium-niobate (PPLN) waveguide as a nonlinear optical element. Our module generates output '1' bits only when all inputs are '1', with negligible power penalty.

High-reliability gate driving circuit

Abstract: A high-reliability gate driving circuit includes a plurality of odd shift register stages and a plurality of even shift register stages. Each odd shift register stage generates a corresponding gate signal furnished to a corresponding odd gate line according to a first clock and a second clock having a phase opposite to the first clock, and further functions to pull down a gate signal of at least one even gate line or at least one odd gate line different from the corresponding odd gate line. Each even shift register stage generates a corresponding gate signal furnished to a corresponding even gate line according to a third clock and a fourth clock having a phase opposite to the third clock, and further functions to pull down a gate signal of at least one odd gate line or at least one even gate line different from the corresponding even gate line.