本书是Reinhold Ludwig教授和Pavel Bretchko教授编著的一本电气与计算机系本科生教材，由王子宇 张肇仪 徐承和等翻译。主要特点是避开电磁场理论的处理方法，采用分布参量等效电路的方法讨论射频和微波电路设计问题。
2020-02-13 03:12:10
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1. 当元件的电压和电流为关联参考方向时：
P >0, 元件吸收功率，为负载。
P 0, 元件发出功率，为电源。
P <0, 元件吸收功率，为负载。
3. 在电路中，功率是平衡的，即：
电源发出的功率＝负载吸收的功率
2020-01-03 11:28:03
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In the early years of radio circuits, fading (defined as slow variations in the amplitude of the
received signals) required continuing adjustments in the receiver’s gain in order to maintain a
relative constant output signal. Such situation led to the design of circuits, which primary ideal
function was to maintain a constant signal level at the output, regardless of the signal’s variations at
the input of the system. Originally, those circuits were described as automatic volume control
circuits, a few years later they were generalized under the name of Automatic Gain Control (AGC)
circuits [1,2].
2019-12-21 20:03:36
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