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两个同样的理想电源（无内阻）并联后，两端电压多少？
The parallel queen of same ideal two power source (there be no internal resistance) , both ends voltage number?
电视机电源要求非常低的纹波电压，过去电视机所采用的是大的无源rc缓冲电路，使电视机的电源效率比较低下。
The television power supply demands low ripple voltage, and the passive rc buffer circuit used in television before, decreased the power effect.
尺寸小，重量轻，频率范围宽；具有电池电压欠压和工作状态指示；可内，外供电方式；非常适合于现场和无外接电源时的使用；
Small Dimensions, lightweight; Wide frequency range; Operation status LEDs; Low-battery warning; Internal or external power supply; Suitable for filed test.
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