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……