Measurement converter for sensor signals in modular systems

We consider a factility for measurement of signals from different types of sensors; the system complies with the CAMAC and VME standards, and it is designed to increase measurement accuracy. We present the basic characteristics of the system. Translated from Izmeritel'naya Tekhnika, No. 11, pp. 15–17, November, 1997.     

用DCT7088对在线流量计的检测

本文叙述了用DCT7088便携式超声波流量计对在线流量计进行比对测试的方法,及对其测试中易出现的问题及对策进行了探讨.     

Analog-digital and digital-analog converters using single-electron and MOS transistors

This paper proposes two kinds of novel single-electron analog-digital conversion (ADC) and digital-analog conversion (DAC) circuits that consist of single-electron transistors (SETs) and metal-oxide-semiconductor (MOS) transistors. The SET/MOS hybrid ADC and DAC circuits possess the merits of the SET circuit and the MOS circuit. We obtain the SPICE macro-modeling code of the SET transistor by studying and fitting the characteristics of the SET with SPICE simulation and Monte Carlo simulation methods. The SPICE macro-modeling code is used for the simulation of the SET/MOS hybrid ADC and DAC circuits. We simulate the performances of the SET/MOS hybrid 3-b ADC and 2-b DAC circuits by using the H-SPICE simulator. The simulation results demonstrate that the hybrid circuits can perform analog-digital and digital-analog data conversion well at room temperature. The hybrid ADC and DAC circuits have advantages as follows: 1) compared with conventional circuits, the architectures of the circuits are simpler; 2) compared with single electron transistor circuits, the circuits have much larger load capability; 3) the power dissipation of the circuits are lower than /spl omega/W; 4) the data conversion rate of the circuits can exceed 100 MHz; and 5) the resolution of the ADC and DAC circuits can be increased by the pipeline architectures.     

用DCT7088对在线流量计的检测

本文叙述了超声波流量计的检测原理,用DCTT088便携式超声波流量计对在线流量计进行比对测试的方法,及对其测试中易出现的问题及对策进行了探讨.     

基于Pspice仿真的数模混合电路故障诊断方法研究

本文研究了利用Pspice仿真软件进行数模混合电路故障诊断的方法 ,设计了虚拟测试设备以实现对电子线路的测试与诊断 ,并结合一七彩灯控制电路 ,详细说明了故障诊断的具体方法和步骤 ,为电路测试与诊断提供一些新的思路。     

Investigation of a mathematical model of digital-analog converters based on code-controlled dividers

Mathematical models of digital-analog converters (DAC) based on a code-controlled divider (CCD), which takes into account the effect of the difference in the residual resistances of the closed switches and the zero-bias voltage of the operational amplifier are presented. A mathematical model of the output resistance of the CCD when it is connected in reverse in the DAC is considered. The particular fetures of the change in the individual components of the error of the DAC and of the output resistance of the CCD over the band are obtained. Translated from Izmeritel'yana Tekhnika, No.22,pp. 35–37, February, 1999.     

Reference voltage ratio meter and its application to analog-digital and digital-analog conversion linearity error measurements

Translated from Izmeritel'naya Tekhnika, No. 9, pp. 18–19, September, 1991.     

Low-frequency-to-code converter

Translated from Izmeritel'naya Tekhnika, No. 7, pp. 56–57, July, 1992.