A 10Ms/s 11-b algorithmic ADC with an active area of 0.19mm is presented. Using an improved clocking scheme, this design overcomes the speed limit of algorithmic ADCs. The proposed ADC employs amplifier sharing, DC offset cancellation, and input memory effect suppression to reduce area and power, and achieve high linearity. The ADC implemented in a 0.13μm thick gate-oxide CMOS process achieves ...

The trend in ADCs and DACs is toward higher speeds and higher resolutions at reduced power levels. Modern data converters generally operate on ±5V (dual supply) or +5V (single supply). In fact, many new converters operate on a single +3V supply. This trend has created a number of design and applications problems which were much less important in earlier data converters, where ±15V supplies and ...

| A very low power 8-bit CPU core has been designed based on an original pass-transistor logic family, SPL and SPHL. The instruction set and external timings are compatible with the Zilog Z80. Average supply current is 740 A at 3V with a 10MHzclock, equivalent to 26% of that of the commercial CMOS Z80 CPU cores using the same design rules (0.8 m, w-metal).

O método semi-empírico HAM/3, desenvolvido por Lindholm e colaboradores há mais de duas décadas, tem uma deficiência. As energias de excitação calculadas por HAM/3 para estados degenerados são desdobradas. Recentemente foi proposto um método para corrigir esta deficiência. Apresentamos aqui resultados de aplicações deste novo método para algumas moléculas com simetria T d , C 3v e D 3h . O esqu...

We consider square and equilateral triangular open acoustic resonators with the ${C}_{4v}$ ${C}_{3v}$ symmetries, respectively. There is a unique property of accidental number fourfold degeneracy eigenstates that gives rise to twofold-degenerate Friedrich-Wintgen (FW) bound states in continuum (BICs). Compared usual FW BICs, degenerate BICs maintain high $Q$ factor wide range size resonators. T...

The anion of the title salt, 2C(4)H(12)N(+)·S(2)O(3) (2-)·4H(2)O, possesses approximate C(3v) symmetry. The water mol-ecules themselves engage in hydrogen bonding, forming a ribbon running along the a axis; adjacent chains are linked to the thio-sulfate anions by hydrogen bonds, forming a three-dimensional network. The cavities in the network are occupied by the tetra-methyl-ammonium counter ions.

This paper proposes an approach for designing a R-2R 10 bit Digital to Analog Converter (DAC) which could be made to operate at low voltage supply by efficiently exploiting the cascaded Operational Amplifier (Op-Amp) architecture. The DAC operates at a 3V power supply with a settling time of 50-100ns , dynamic range of around 50-60 dB for signals upto a frequency of 10Mhz. Graph & simulation re...