公开(公告)号：US08643521B1

公开(公告)日：2014-02-04

申请号：US13688158

申请日：2012-11-28

Applicant: United Microelectronics Corporation

Inventor： Hsueh-Chen Cheng ,  Wen-Hong Hsu ,  Po-Hua Chen ,  Yu-Yee Liow

IPC: H03M1/00

CPC classification number: H03M1/0818 ,  H03M1/742

Abstract: A DAC has at least one bit current-steering circuit. In the DAC, the current-steering circuit has a current source circuit, a switch, a feedback circuit, and an amplifier circuit. The current source circuit is disposed for outputting a bias current to the switch and coupled to the amplifier circuit. The switch has a first input/output terminal coupled to output an analog signal, a control terminal coupled to the feedback circuit, and a second input/output terminal for receiving the bias current, so that the first switch determines whether the first and the second input/output terminals are conducted according to a status of the control terminal.

Abstract translation: DAC具有至少一个位电流转向电路。 在DAC中，电流导向电路具有电流源电路，开关，反馈电路和放大器电路。 电流源电路被设置用于向开关输出偏置电流并耦合到放大器电路。 开关具有耦合以输出模拟信号的第一输入/输出端子，耦合到反馈电路的控制端子和用于接收偏置电流的第二输入/输出端子，使得第一开关确定第一和第二 输入/输出端子根据控制端子的状态进行。