| 摘要 |
<p>A power supply circuit suitable for driving a liquid crystal display, in which a voltage is divided by resistors (R1-R5) on the basis of supply voltages (VDD, VEE), and voltage followers are formed of operational amplifiers (OP1-OP4) to produce output voltages (V0 to V5). The supply voltage (VDD) and an intermediate voltage (Va) outputted from a voltage dividing circuit (S) are supplied to the operational amplifiers (OP1, OP2), while the intermediate voltage (Va) and the supply voltage (VEE) are supplied to the operational amplifiers (OP3, OP4). In the voltage dividing circuit (S), a parallel circuit of a high resistor (R12) and a capacitor (C5) and a parallel circuit of a high resistor (R13) and a capacitor (C6) are series-connected between the intermediate voltage (Va) and the supply voltage (VEE), and the intermediate voltage (Va) is taken out from the nodes of the two parallel circuits.</p> |
