Implementation of digital methods to increase and maintain data-conversion accuracy in real environment can be regarded as an important direction to improve quality of experimental research. Microprocessors availability allows to realize these methods. The paper describes a new algorithm of calibration and digital correction of high-accuracy data-converters and gives examples of its implementation in experimental devices.
1. Infroduction
values and shapes of currents and voltages. The BD-algorithm of calibration was worked out to Data converters are important components of provide high accuracy of DAC in operating condimeasuring and control systems in experiments and tions [3J. It is meant for precise determination the provide an interface of computers and experimen-DAC transfer functions. The DAC output signal tal installations. Their accuracy determines the A(x) is a joint (U) of certain bit weights Ak quality of a research to a great extent. High re-corresponding to the input code x. At first, let us quirements of modern experimental physics to the assume that the superposition principle satisfies accuracy and reliable stability of converters make the required accuracy, so the output signal value solution of some problems connected with the can be represented by an arithmetic sum of the bit operative metrological maintenance in real en-weights eigenvalues (BW): vironment quite urgent.