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发明公开
CN1868117A 跨导电路 失效 - 权利终止 转让

跨导电路
摘要：
本发明涉及一种用于将差分输入电压转换成差分输出电流的跨导电路，其中该电压分别是作为两个信号而被提供到两个输入IN+、IN－上的。依照本发明，所述差分输入电压的两个信号中的每一个分别经由跟随晶体管TF+、TF－而被提供给每一个输入IN+、IN－，其中所述跟随晶体管TF+、TF－分别通过其发射极而与所述输入IN+、IN－相连，并且在控制电极上接收所述信号。此外，该跨导所具有的两个输入IN+、IN－中的每一个分别连接到相应的电流源CS－、CS+，其中该电流源CS－、CS+分别是由跨导的另一个输入IN－、IN+来进行动态控制的，所述电流源CS－和CS+分别促使由所述电源流CS－、CS+提供给每一个输入IN+、IN－的电流消除输入电压信号的电压变化所导致的电流变化。
摘要（英）：

The present invention relates to a transconductance circuit intended to convert a differential input voltage, supplied as two signals to two inputs, IN+ and IN- respectively, into a differential output current. According to the invention, each of the two signals of said differential input voltage is supplied to each input, IN+ and IN- respectively, through a follower transistor, TF+ and TF- respectively, connected to said input, IN+ and IN- respectively, by its emitter and receiving said signal on a control electrode. Moreover, each of the two inputs, IN+ and IN- respectively, of the transconductance is connected to a respective current source, CS- and CS+ respectively, that is dynamically controlled by the other input of the transconductance, IN- and IN+ respectively, said current source, CS- and CS+ respectively, being such that the current supplies to each input, IN+ and IN- respectively, by said current source, CS- and CS+ respectively, eliminates current variations caused by voltage variations of the input voltage signal.

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