| 摘要 |
<p>A reference voltage generating circuit (10) applies an upper reference voltage (VRH) to a first reference voltage terminal (P1), and a lower reference voltage (VRL) to a second reference voltage terminal (P2) in a first state (S1), and the reference voltage generating circuit applies the voltages by opposite polarities in a second state (S2). A first switch group (SWG1) selects one tap, which corresponds to a digital input signal (DIN) from among a plurality of taps (T1-Tn+1) in the first state, and in the second state, the first switch group selects a tap at a position symmetrical to the tap selected in the first state.</p> |
