| 主权项 |
1. A digital-to-analog (D/A) converter generating an analog signal corresponding to a digital input signal, the D/A converter comprising:
a plurality of D/A conversion circuits; and an amplifier circuit coupled between the plurality of D/A conversion circuits in a negative feedback manner; wherein: the plurality of D/A conversion circuits include a first-stage D/A conversion circuit configured to receive a multi-bit digital input signal including a least significant bit of the digital input signal, and another D/A conversion circuit configured to receive a higher-order bit than a bit of a digital input signal received by a previous-stage D/A conversion circuit thereof, and each D/A conversion circuit includes:
an R-2R ladder type resistor network corresponding to the digital input signal received by the D/A conversion circuit,a plurality of first transistors which are coupled between the resistor network and a first wiring at a first voltage level and the sizes of which are set at a ratio of powers of 2, anda plurality of second transistors which are coupled between the resistor network and a second wiring at a second voltage level, the sizes of which are set at a ratio of powers of 2 and which are respectively turned on and off complementarily to the plurality of first transistors according to the digital input signal. |
