Voltage level generating device

A voltage level generating device, comprising:

• a reference voltage generating module, for providing a first reference voltage level and a second reference voltage level;
• a first circuit module, having a first input terminal coupled to the reference voltage generating module for receiving the first reference voltage level, a second input terminal, and an output terminal coupled to the second input terminal, the first circuit module being utilized for generating a first voltage level at the output terminal according to the first reference voltage level;
• a second circuit module, having a first input terminal coupled to the reference voltage generating module for receiving the second reference voltage level, a second input terminal coupled to the second input terminal of the first circuit module, and an output terminal coupled to the second input terminal of the second circuit module, the second circuit module being utilized for generating a second voltage level at the output terminal of the second circuit module according to the second reference voltage level;
• and
• a switch module, comprising a first switch element coupled to the output terminal of the first circuit module and a second switch element coupled to the output terminal of the second circuit module, for selectively outputting the first voltage level or the second voltage level.