Voltage reduction circuit for bandgap reference voltage circuit

A voltage reduction circuit for a bandgap reference voltage circuit, comprising:

• a first transistor having a first terminal, a second terminal and a third terminal, wherein the third terminal receives an initial bandgap reference voltage from the bandgap reference voltage circuit;
• a current mirror circuit, including:
• a second transistor having a first terminal, a second terminal and a third terminal, wherein the first terminal of the second transistor is connected to a voltage source, and the second terminal of the second transistor is connected to the first terminal of the first transistor;
• and
• a third transistor having a first terminal, a second terminal and a third terminal, wherein the first terminal of the third transistor is connected to the voltage source, the second terminal of the third transistor is connected to an output node, and the third terminal of the third transistor is connected to the third terminal of the second transistor to form the current mirror circuit together with the second transistor;
• a voltage dividing circuit connected between the second terminal of the first transistor and a ground terminal, wherein the voltage dividing circuit has a voltage dividing node for outputting a first dividing voltage;
• an output resistor having one end connected to the output node;
• and
• a fourth transistor having a first terminal, a second terminal and a third terminal, wherein the first terminal of the fourth transistor is connected to another end of the output resistor, the second terminal of the fourth transistor is connected to the ground terminal, and the third end of the fourth transistor is connected to the voltage dividing node for receiving the first dividing voltage,
• wherein the current mirror circuit is configured to form a first current on the voltage dividing circuit through the first transistor, and mirror the first current to the output resistor through the second transistor and the third transistor at a predetermined magnification to form a second current,
• wherein the voltage dividing circuit and the output resistor each have a first temperature characteristic, the first transistor and the fourth transistor each have a second temperature characteristic, so as to generate, at the output node, a reference voltage that is independent of temperature and lower than the initial bandgap reference voltage.