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第150行： − − |publisher = Newnes − − |year = 2002 第159行：
第155行： − |isbn = 9780750656429 第171行：
第166行： − |url = https://books.google.com/books?id=lROa-MpIrucC&pg=PA247
→Terminology
正反馈和负反馈这两个名词最早应用于二战前的反馈。20世纪20年代，随着再生电路的问世，正反馈的概念已经出现。
正反馈和负反馈这两个名词最早应用于二战前的反馈。20世纪20年代，随着再生电路的问世，正反馈的概念已经出现。
Friis & Jensen (1924) described regeneration in a set of electronic amplifiers as a case where the "feed-back" action is positive in contrast to negative feed-back action, which they mention only in passing. Harold Stephen Black's classic 1934 paper first details the use of negative feedback in electronic amplifiers. According to Black:
Friis & Jensen (1924) described regeneration in a set of electronic amplifiers as a case where the "feed-back" action is positive in contrast to negative feed-back action, which they mention only in passing. Harold Stephen Black's classic 1934 paper first details the use of negative feedback in electronic amplifiers. According to Black:
Friis & Jensen(1924)将一组电子放大器中的再生描述为 "回馈 "作用是正的情况，与负回馈作用相反，他们只是顺便提到了负回馈。哈罗德•斯蒂芬•布莱克（Harold Stephen Black）在1934年的经典论文中首次详细介绍了负反馈在电子放大器中的应用。根据Black的说法：
Friis & Jensen(1924)将一组电子放大器中的再生描述为 "回馈 "作用是正的情况，与负回馈作用相反，他们只是顺便提到了负回馈。哈罗德•斯蒂芬•布莱克（Harold Stephen Black）在1934年的经典论文中首次详细介绍了负反馈在电子放大器中的应用。根据Black的说法：
"Positive feed-back increases the gain of the amplifier, negative feed-back reduces it."
"Positive feed-back increases the gain of the amplifier, negative feed-back reduces it."
据Mindell(2002年)说，在这之后不久就出现了术语上的混乱：
据Mindell(2002年)说，在这之后不久就出现了术语上的混乱：
"...Friis and Jensen had made the same distinction Black used between 'positive feed-back' and 'negative feed-back', based not on the sign of the feedback itself but rather on its effect on the amplifier’s gain. In contrast, Nyquist and Bode, when they built on Black’s work, referred to negative feedback as that with the sign reversed. Black had trouble convincing others of the utility of his invention in part because confusion existed over basic matters of definition."
"...Friis and Jensen had made the same distinction Black used between 'positive feed-back' and 'negative feed-back', based not on the sign of the feedback itself but rather on its effect on the amplifier’s gain. In contrast, Nyquist and Bode, when they built on Black’s work, referred to negative feedback as that with the sign reversed. Black had trouble convincing others of the utility of his invention in part because confusion existed over basic matters of definition."