Low-noise precision bipolar direct current voltage source and generating method thereof

Abstract

The invention provides a high-precision, linear and low-noise bipolar direct current voltage source. The voltage source comprises a power source converting module, a two-stage buffering voltage stabilization input module, a central control unit, a high-precision digitized voltage converting unit, an LCD display unit, an upper computer program, an operation panel and a temperature control output unit. Two-stage buffering voltage stabilization input is applied, system noise is reduced through digital-analog partitioning isolation area designing, a temperature control technology is used for improving stability of system output, a high-precision digitalized technology is used for restraining noise of voltage output, and the problems that in current radiation detection research, linear precision of an existing direct current voltage source is not high, and noise influences are great are solved. Drive capacity is high, precision reaches 20 bits, the resolution ratio is 1ppm, a linear error is smaller than 1ppm, the highest signal frequency is 10kHz, and zero level output voltage noise is smaller than 20 microvolt ( smaller than 1LSB).

Description

technical field [0001] The invention belongs to the field of DC voltage sources, and in particular relates to a bipolar DC voltage source device capable of providing high precision, linearity and low noise and a generating method thereof. Background technique [0002] In the field of high-energy physics research, nuclear radiation detection often studies the interaction between various microscopic particles or the specific process of nuclear reactions, but the generated particle signals are often very weak, which can be as low as nA or even fA level, and reflect The duration of the process signal is very fast, only a few ns, or even faster. And in some harsh environments, due to the existence of various noises, the useful signal will be submerged in the noise. The detection and measurement of weak signals is a great challenge to the test and measurement system. The voltage source is used as the driving force of the entire test system. The power source, its anti-interference...

AI Technical Summary

Problems solved by technology

And in some harsh environments, due to the existence of various noises, the useful signal will be submerged in the noise. The detection and measurement of weak signals is a great challenge to the test and measurement system. The voltage source is used as the driving force of the entire test system. Power source, its anti-interference, noise performance, accuracy, linearity, stability, and ripple characteristics are important factors affecting the test system

Most of the current linear power supplies use voltage conversion, rectification, filtering and other technologies, the linearity and noise level have a great influence on the test results, and the volume is large, the man-machine interface is inconvenient, and the installation and debugging are inflexible and inconvenient use

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