用于稳定磁场控制的低噪声模块化电流源
A low noise modular current source for stable magnetic field control
摘要：
介绍了一种低成本、稳定、可编程的单极电流源。该电路采用模块化结构设计，适用于必须同时控制多个直流电源的应用。混合开关/线性设计有助于提高稳定性，降低功耗和串扰。单个直流电源可为多个单元供电，同时允许输出端具有各种最大电流值和合规电压。该电路由单极电压模拟控制，通过商用数模转换卡实现电流可编程性和控制。
英文摘要：
A low cost, stable, programmable, unipolar current source is described. The circuit is designed in view of a modular arrangement, suitable for applications where several DC sources must be controlled at once. A hybrid switching/linear design helps in improving the stability and in reducing the power dissipation and cross-talking. Multiple units can be supplied by a single DC power supply, while allowing for a variety of maximal current values and compliance voltages at the outputs. The circuit is analogically controlled by an unipolar voltage, enabling current programmability and control through commercial digital-to-analogue conversion cards.
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