资料介绍
摘要： 分析了五个恒流电路设计的分歧。性能数据进行讨论，和电路设计的一些说明精度、 动态阻抗、 和法规遵从性范围之间的不同的妥协。Maxim > App Notes > Amplifier and Comparator Circuits
Keywords: current source, current sink, constant-current source, op amp Aug 21, 2006
APPLICATION NOTE 3869
Variations Among Current-Sink/Source Circuits with a Single Op
Amp
Abstract: The design differences among five constant-current circuits are analyzed. Performance data are
discussed, and illustrate the different compromises between precision, dynamic impedance, and compliance
range for some of the circuit designs.
A controlled constant-current source or sink is a useful circuit block to use in designing electronic applications
such as sensor bias, amplifier bias, and special waveform generation. These types of circuits exhibit high-output
dynamic impedance, while delivering relatively large curre
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