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发明公开
CN105992981A 低压差电压调节器电路 有权

低压差电压调节器电路
摘要：
在所描述的实例中，揭示一种电压调节器(200)。电压调节器电路(200)包含开关(250)、第一反馈电路(202)及第二反馈电路(204)。所述开关(250)经配置以在第一端子处接收输入信号(108)且在第二端子处接收误差信号(254)，且经配置以在第三端子处产生输出信号(255)。所述第一反馈电路(202)包含第一晶体管(270)及第二晶体管(260)，其经配置以响应于所述输出信号(255)与参考信号(110)之间的差而控制所述开关(250)的所述第二端子处的所述误差信号(254)。所述第二反馈电路(204)经配置以感测所述误差信号(254)且在第二节点及第四节点处产生尾电流以分别维持所述第一晶体管(270)及所述第二晶体管(260)中的大体上相等电流，借此致使所述输出信号(255)的电压大体上等于所述参考信号(110)的电压。
摘要（英）：

In described examples, a voltage regulator (200) is disclosed. The voltage regulator circuit (200) includes a switch (250), a first feedback circuit (202) and a second feedback circuit (204). The switch (250) is configured to receive an input signal (108) at a first terminal and an error signal (254) at a second terminal and configured to generate an output signal (255) at a third terminal. The first feedback circuit (202) includes a first transistor (270) and a second transistor (260) configured to control the error signal (254) at the second terminal of the switch (250) in response to a difference between the output signal (255) and a reference signal (110). The second feedback circuit (204) is configured to sense the error signal (254) and generate a tail current at the second node and the fourth node to maintain substantially equal currents in the first transistor (270) and the second transistor (260), respectively, thereby causing a voltage of the output signal (255) as substantially equal to a voltage of the reference signal (110).

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