Bandgap reference circuit having clamping control circuit and being capable of improving rate of providing predetermined voltage

A voltage generator comprising:

• a voltage generation circuit configured to generate a predetermined voltage and a first current at an operation terminal;
• a capacitance device comprising a first terminal coupled to the operation terminal, and a second terminal coupled to a first reference voltage terminal;
• and
• a clamping control circuit coupled between the operation terminal and a second reference voltage terminal, comprising:
• a first switch;
• and
• a clamping unit coupled to the first switch and configured to allow a portion of the first current to flow between the operation terminal and the second reference voltage terminal through the clamping unit when the first switch is turned on.

A voltage control method used on a voltage generator, the voltage generator comprising a voltage generation circuit, a capacitance device and a clamping control circuit;

• the clamping control circuit comprising a first switch and a clamping unit;
• the voltage generation circuit comprising an operation terminal, the capacitance device comprising a first terminal coupled to the operation terminal;
• the clamping control circuit being coupled to the operation terminal;
• the method comprising:
• generating a first current by the voltage generation circuit;
• turning on the first switch so that a portion of the first current flows through the clamping unit;
• and
• turning off the first switch to charge or discharge the capacitance device to adjust a voltage of the operation terminal.