Digital electronics

About: Digital electronics is a research topic. Over the lifetime, 10354 publications have been published within this topic receiving 153532 citations.

Method and apparatus for the correlation of sample bits of spread spectrum radio signals

Abstract: A spread spectrum receiver correlator for a with filters matched to transmitter chip codes are implemented in digital circuits along with a digital circuit for acquisition and tracking of the arrival times of the chip codes The digital circuit implementations are used for the noncoherent demodulation of pulse position spread spectrum modulation signals where the pulse is a carrier modulator by a chip code and for the noncoherent demodulation of multiple chip code modulation signals where each information symbol is represented by one of several chip codes modulating a carrier

A Catalog of Three-Variable Or-Invert and And-Invert Logical Circuits

Abstract: This report gives a complete catalog of minimal NOR circuits and minimal NAND circuits, assuming complements not available, for all logic functions of three variables. Minimal circuits for a function are those that satisfy these conditions: 1) The number of logic blocks of the circuit is least possible for performing the function; 2) The number of connections in the circuit (total number of inputs) is least possible, subject to the condition that the circuit satisfies the first condition. In addition, the circuits satisfy certain reasonable restrictions on fan-in and fan-out.

SOCRATES: A System for Automatically Synthesizing and Optimizing Combinational Logic

Abstract: This paper presents SOCRATES, a system of programs which synthesize and optimize combinational logic circuits from boolean equations. SOCRATES optimizes logic using boolean and algebraic minimization techniques, and it optimizes circuits derived from this logic in a user defined technology with a rule based expert system. This paper discusses the goals of logic synthesis and the capabilities needed in a tool to meet these goals. SOCRATES's capabilities are then presented and demonstrated with experiments run on circuits from the 1986 Design Automation Conference synthesis benchmark set.

Possible performance of capacitively coupled single‐electron transistors in digital circuits

Abstract: We have carried out a theoretical analysis of the possible performance of single‐electron transistors with capacitive coupling in simple logic and memory circuits. Both resistively loaded and complementary transistors have been analyzed, with a detailed account of parasitic factors including thermal fluctuations and background charge variations. The analysis shows that at optimal values of the parameters including the background charge, the maximum operation temperature is close to 0.025e2/CkB, where C is the capacitance of the smallest tunnel junction. At T∼0.01e2/CkB the parameter margins are relatively wide; for the structures with 2‐nm minimum feature size, the latter temperature is close to 77 K. A typical margin for background charge fluctuations is on the order of 0.1e; these fluctuations may be a major obstacle for practical ultradense single‐electron circuits.

BDS: a BDD-based logic optimization system

Abstract: This paper describes a new BDD-based logic optimization system, BDS. It is based on a recently developed theory for BDD-based logic decomposition, which supports both algebraic and Boolean factorization. New techniques, which are crucial to the manipulation of BDDs in a partitioned Boolean network environment, are described in detail. The experimental results show that BDS has a capability to handle very large circuits. It offers a superior runtime advantage over SIS, with comparable results in terms of circuit area and often improved delay.