An electronic gate is a subunit that allows a signal to pass under certain conditions. If these conditions are not satisfied the gate remains closed and the signal cannot proceed. The dictionary defines the word "logic" as a "connection or outcome of events" and it is in this sense that the word is applied to electronic gates. The connection of events being that if certain conditions are satisfied
(that is, if certain events take place) , then a further event follows logically. The field of logic in electronic systems is very broad and logic theory is being applied more and more to all kinds of control, measurement and calculating system, Logic theory is, of course, the basis of what is probably the best known electronic system, the digital computer.
Logic circuit in general comes under a branch of electronics known as digital applications as opposed to linear or analogue applications. Digital systems use signals, which are of pulse form, that is, a series of short-duration square waves. Analogue systems use signals of, or derived from, the familiar sine waveform. Amplifiers used in digital systems must be wide-band amplifiers because of the many harmonics that make up a square wave.
邏輯電路
壹個電子門是壹個亞基，它允許信號通過壹定的條件。如果這些條件得不到滿足的大門仍然關閉和信號無法繼續。這本詞典定義為“連接或活動的結果“字“邏輯“，並在這壹詞應用到電子門感。因為，作為壹個事件的連接，如果某些條件得到滿足
（也就是說，如果某些事件的發生），然後再事件如下邏輯。在電子系統的邏輯領域非常廣泛，邏輯理論被應用到越來越多的控制，測量和計算系統中的所有種，邏輯理論，當然，什麽可能是最知名的電子系統，基礎數字計算機。
壹般的邏輯電路來作為下壹個，而不是線性或模擬應用數字應用知名電子科。使用數字系統的信號，這是脈沖形式，就是壹種短期方波系列。使用模擬信號系統，或從熟悉的正弦波形而得。在數字系統中使用的放大器必須是因為構成方波多諧波寬帶放大器。