论文部分内容阅读
若要将一个600Ω的音频电路连接到一个50Ω或75Ω电路或测试仪器上,就需要一个阻抗匹配电路；或者对电路作隔离时,还需要一个变压器。两种方法各有利弊。常见的变压器可以用低至1．5dB的典型损耗实现阻抗匹配,提供直流隔离作用,并能用于平衡或不平衡运行的
To connect a 600Ω audio circuit to a 50Ω or 75Ω circuit or test instrument requires an impedance matching circuit or a transformer to isolate the circuit. Both methods have their pros and cons. Common transformers can achieve impedance matching with typical losses as low as 1.5dB, provide DC blocking and can be used for balanced or unbalanced operation