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DA输出电路分析

user5099033
Prodigy 193 points

Other Parts Discussed in Thread: DAC3482

下图是DAC3482的I通道输出电路，这里T11是1:1的传输线变压器，T4是4:1的变压器。如果IOUTA2是20mA,IOUTA1是0mA，求分析下此时IOUTA2输出是多少，为什么？这里的传输线变压器有什么作用？前面两个100欧电阻中间接地有啥作用？