用于偏置相关噪声测量的低噪声恒流源
Low noise constant current source for bias dependent noise measurements
摘要：
本文介绍了一种用于测量无序系统中$1/f$噪声的低噪声恒流源。该电源可提供低噪声恒定电流，从低至1 $μ$ A到几十mA，高电压合规限值约为20 V。恒流源有几个阶段，可以以独立的方式或一起工作，以提供所需的负载电流值。在整个电流范围内，电流源产生的噪声非常低。本文还介绍了一种低噪声电压源的制造方法，它是根据MAT04数据手册中现有的设计，针对偏置相关噪声测量进行改进的。
英文摘要：
A low noise constant current source used for measuring the $1/f$ noise in disordered systems in ohmic as well as non-ohmic regime is described. The source can supply low noise constant current starting from as low as 1 $μ$A to a few tens of mA with a high voltage compliance limit of around 20 Volts. The constant current source has several stages which can work in a standalone manner or together to supply the desired value of load current. The noise contributed by the current source is very low in the entire current range. The fabrication of a low noise voltage preamplifier modified for bias dependent noise measurements and based on the existing design available in the MAT04 data sheet is also described.
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