| 摘要 |
<p>PURPOSE: To provide a reference voltage generation circuit that can fully cope with effects due to the influence of fluctuations in process conditions and operating environment, in addition to the change in a power supply voltage which is inputted externally. CONSTITUTION: A power supply voltage VCC is boosted to a high-voltage generation circuit 45 for causing a breakdown in the diode of a clamp circuit 50, thus generating a boosted voltage V pump that is clamped to a constant level. Then, it is divided by a voltage-dividing circuit 60, thus outputting a reference voltage Vref. A breakdown voltage cannot be easily affected by the operating environment, such as process conditions and a temperature change, thus maintaining an extremely stable constant level. Therefore, the reference voltage can be stabilized, without being affected by the process conditions and temperature changes.</p> |
