Patent ID: 8643521

Claim:
A digital-to-analog converter, having at least one bit current-steering circuit, and the current-steering circuit comprising: a current source circuit for outputting a bias current; a first switch having a first input/output terminal coupled to a first output terminal of the current-steering circuit, a control terminal, and a second input/output terminal coupled to the current source circuit to receive the bias current, wherein the first switch determines whether the first and the second input/output terminals are conducted by one another according to a status of the control terminal; a first feedback circuit coupled to the first switch, including: a first transistor having a first source/drain terminal coupled to the control terminal of the first switch, a second source/drain terminal, and a gate terminal; and a first resistance element having a first terminal coupled to the gate terminal of the first transistor, and a second terminal coupled to the first input/output terminal of the first switch; and a first amplifier circuit having an input terminal coupled to the second input/output terminal of the first switch, an output terminal coupled to the second source/drain terminal of the first transistor, and a voltage terminal coupled to a voltage source.