In this paper, we propose fuzzy learning models suitable for digital circuit implementation. In the first place, we propose a division-free model which is advantageous in the circuit size and the processing speed. Next, we also consider to improve the accuracy of the division-free model by using ensemble learning. The effectiveness of the proposed methods is demonstrated by numerical simulation...

A system equation with certain properties describes implicitly function sets as the basis for an optimal design of a digital circuit. A necessary condition for the realization of a digital circuit is that the associated system equation is resolvable [2], [4]. This paper shows how the resolvability of the system equation can be checked and how the explicit description of the circuit functions ca...

Integration of circuit CAD activities into a single design framework requires that CAD data of widely diiering forms be integrated into a single design database. This results in data which is highly structured, multi-dimensional and very complex; most current database models (for example the relational model) lack the expressive power to eeciently represent such data. The authors have developed...

A complex digital circuit comprises of adder as a basic unit. The performance of the circuit depends on the design of this basic adder unit. The speed of operation of a circuit is one of the important performance criteria of many digital circuits which ultimately depends on the delay of the basic adder unit. Many research works have been devoted in improving the delay of the adder circuit. In t...

In many applications such as TDMA cellular telephone, OFDM, Bluetooth, Satellite communication etc. QPSK digital modulation technique is used due to its higher bandwidth efficiency, higher noise immunity and simpler circuit. Simpler circuit is having lower cost, smaller size and lower power dissipation. In this paper a new circuit for QPSK modulator is designed which improves the area of the ci...

This paper proposed an efficient implementation of digital circuit based on the Euclidean Algorithm with modular arithmetic to find Greatest Common Divisor (GCD) of two Binary Numbers given as input to the circuit. Output of the circuit is the GCD of the given inputs. In this paper subtraction-based narrative defined by Euclid is described, the remainder calculation replaced by repeated subtrac...

An asynchronous circuit, or self-timed circuit, is a sequential digital logic circuit which is not enabled by a global clock signal. Instead of that, they often use signals that indicate completion of operations and instructions, specified by handshaking or simple data transfer protocols. This type is contrasted with a synchronous logic circuit where changes to the output signal values are trig...

A CMOS image sensor with pixel level analog to digital conversion is presented. Each 13.8μm x 13.8μm pixel area contains a photodiode and a dynamic comparator using the maximum voltage swing available (0V 1.8V). The comparator does not need any bias current and is insensitive to fabrication process variations. Also a digital to analog converter (DAC) is used to deliver a voltage reference in or...

   In this paper we propose a simulation study to carry out dynamic analysis of CNTFET-based digital circuit, introducing in the semi-empirical compact model for CNTFETs, already proposed by us, both the quantum capacitance effects and the sub-threshold currents. To verify the validity of the obtained results, a comparison with Wong model was carried out. Our mode...

The types of circuits in which analog design techniques are employed typically differ from those in which digital design methods are used, with analog circuits being commonly applied to high speed, low precision functional blocks such as mixers and RF modulators, while digital circuits are chosen for high precision, high complexity blocks that operate at frequencies well below the fT of the tra...