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[en] A multichannel unit of the analog-to-digital converter (ADC) designed for analog data acquisition and processing in physical experiments is described. The unit has 32 analog inputs with the aperture delay being not more than 100 ns. Bit capacity is 10 bits, time of transformation - 40 μs/channel

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[en] In response to the current imbalance phenomenon and its harmfulness, a current sharing circuit model is built up, which reveals the underlying causes for the current imbalance through a quantitative analysis. Then, a feasible approach of improvement, namely enlargement of the length of connection busbars, is proposed. After the amendment, it can be seen that the current sharing coefficient is almost unity under rated or fault current conditions. (fusion engineering)

[en] The performances of cycling-scale AD converters in which only a part of the effective channels contribute to the compensation process ('partial' compensation) are analyzed. It is shown how the use of not high resolution DACs for the generation of the Qsub(i) levels is possible without introducing linearity errors. (Auth.)

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[en] A high performance 10-bit 100-MS/s two-channel time-interleaved pipelined ADC is designed for intermediate frequency 3G receivers, and OTA is shared among the channels for low power dissipation. Offset mismatch, gain mismatch and time skew mismatch are overcome by OTA sharing, increasing the accuracy of each channel and global passive sampling respectively. The linearity deterioration caused by the charge injection of the output switch and the crosstalk of the off-switch capacitor is removed by modifying the clock signal arrangement. The total power consumption of the presented ADC is 70 mW from a 3.3-V power supply. Fabricated in a 180-nm CMOS process, the core of the prototype occupies an area of 2.5 x 1.5 mm², achieving more than 70-dB spurious-free dynamic range and over 56-dB signal-to-noise distortion ratio over the Nyquist input band at 100-MHz sampling frequency. (semiconductor integrated circuits)

[en] A number of superconductive A/D converter designs that show promise for superiority in high-bandwidth or high-resolution applications are known. On the high-resolution side, counting-type converters appear quite attractive. The voltage-to-frequency and tracking A/D converters are reviewed in this category. On the ultra-high-bandwidth side (greater than about 1 GHz) the parallel-type A/D converters seem to be advantageous. A number of parallel periodic-threshold type A/D converters that have been attempted over the years as well as a fully parallel (2^N - 1 comparators) A/D converter are reviewed in this paper