| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a regulator circuit which very quickly responses to variations in load current to generate a stable internal supply voltage and supplies sufficient driving currents. <P>SOLUTION: The regulator circuit 30a includes: a pre-amplifier circuit 32a which detects the difference between a reference voltage VREF and an internal supply voltage VINT and amplifies it; a clamp circuit 34a which restricts the amplitude of the output of the pre-amplifier circuit 32a; a main amplifier circuit 36a which amplifies the output, restricted in amplitude, of the pre-amplifier 32a; and a driver circuit 38 which outputs the internal supply voltage VINT in accordance with the output of the main amplifier circuit 36a. Even if the internal supply voltage VINT suddenly varies, the regulator circuit 30a is free from oscillation thanks to the effect of the clamp circuit 34a. <P>COPYRIGHT: (C)2009,JPO&INPIT |
