This paper presents a novel digital circuit, based on the analog Dual Mixer Time Difference circuit, developed by David W. Allan, designed to characterise oscillators frequency stability. The proposed digital circuit, named Digital Dual Mixer Time Difference (DDMTD), is capable of measuring time differences between two digital clock signals with very fine resolution (subpicosecond) using a rela...

All practical digital circuits are usually a mixture of combinational and sequential logic. Flip–flops are essential to sequential logic therefore fuzzy flip–flops are considered to be among the most essential topics of fuzzy digital circuit. The concept of fuzzy digital circuit is among the most interesting applications of fuzzy sets and logic due to the fact that if there has to be an ultimat...

An on-chip process, supply voltage, and temperature (PVT) compensation technique for low-voltage CMOS digital circuits was proposed. Because the degradation of circuit performance originates from the variation of the saturation current in transistors, we developed a compensation circuit consisting of a reference current that is independent of PVT variations. The circuit is operated so that the ...

A mixed-signal circuit that can emulate multi-layer perceptron neural networks is presented. The sequential processing provides a tradeoff between speed, power consumption and circuit area, allowing a flexible accommodation of different network structures. The design of the three most critical analog basic blocks of the processor is presented. a) Dynamic analog memories: A technique of switchin...

The maximum power point tracking (MPPT) control in the Photovoltaic system is the key control technology, however present controller has the disadvantages of long development cycle, high cost and complex verification, and there are some disadvantages carrying out totally physical simulation or totally digital simulation of different control algorithms. This paper carried out design of hardware ...

Progress of integrated circuit technology allows integration of analog and digital circuits on the same chip. This co-integration yields higher performances and reliability, while reducing power consumption, but also raises new challenges for circuit designers. The substrate noise generated by the switching digital part has detrimental effects on the analog part. In this contribution, a wide-ba...