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发明授权
CN101158877B 恒流电路以及调节恒流电路的输出电流量的方法 失效 - 权利终止

恒流电路以及调节恒流电路的输出电流量的方法
摘要：
本发明公开了恒流电路以及调节恒流电路的输出电流量的方法。该恒流电路输出恒定电流，位于该恒流电路之外的电流控制装置能够控制所述恒流电路的输出电流量，该电路包括：恒压源，能够输出恒定电压；第二FET，该第二FET的栅极与所述恒压源的输出端相连接，并且所述第二FET的漏极构成所述恒流电路的输出端子；和第一FET，该第一FET能够根据所述电流控制装置输出的控制信号控制所述第二FET的漏极的输出电流量，所述第一FET的漏极与所述恒压源和所述第二FET的栅极相连接，并且第一FET的栅极与所述电流控制装置相连接。
摘要（英）：

The present invention discloses a constant current circuit and a method for regulating the output current magnitude of the constant current circuit. The constant current circuit outputs constant current and the current control device besides the constant current circuit can control the output current magnitude of the constant current circuit, and the circuit includes the following components: a constant pressure source which can output the constant voltage; a second FET with a grid connected with the output end of the constant pressure source, and the drain of the second FET composes the output terminal of the constant current circuit; and a first FET which can control the output current magnitude of the drain of the second FET according to the control signal outputted by the current control device, the drain of the first FET is connected to the grid of the second FET, and the gird of the first FET is connected with the current control device.

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