Reference voltage generating circuit and low power consumption sensor

A self-biased and capacitive-coupled reference voltage generating circuit, comprising:

• a current source circuit, an input terminal of the current source circuit is connected to a first feedback node, a voltage of the first feedback node is a reference voltage, and a plurality of output terminals of the current source circuit output current sources;
• a core circuit, comprising:
• a first stacked diode-connected circuit, having a first transistor with a diode-connected configuration and a second transistor having a conductive type same as that of the first transistor, wherein a connection node of the first transistor and the second transistor outputs a threshold voltage difference value, wherein the input terminal of the first stacked diode-connected circuit, the gates of the first transistor and the second transistor are connected to one of the output terminals of the current source circuit, wherein the output terminal of the second transistor is connected to a ground terminal;
• and
• a second stacked diode-connected circuit, having a third transistor with a diode-connected configuration and a fourth transistor having a conductive type same as that of the third transistor, wherein a connection node of the third transistor and the fourth transistor outputs the reference voltage, wherein the input terminal of the second stacked diode-connected circuit, the gates of the third transistor and the fourth transistor are connected to another one of the output terminals of the current source circuit, wherein a second feedback node is formed between the output terminal of the fourth transistor and the input terminal of the current source circuit.