| 摘要 |
A bandgap reference voltage circuit comprises a current mirror unit, an operation amplifier (OP), a first resistor, a second resistor, an auxiliary unit, and a voltage generation circuit. An output end of the OP is coupled to a feedback end of the current mirror unit. An end of the first resistor and an end of the second resistor are coupled to a positive input end of the OP. Another end of the first resistor is coupled to a second end of the current mirror unit. A second end of the voltage generation circuit is coupled to another end of the second resistor. An end of the auxiliary unit is coupled to a negative input end of the OP and a first end of the voltage generation circuit, and another end of the auxiliary unit is coupled to the first end of the current mirror unit. |
| 主权项 |
1. A bandgap reference voltage circuit comprising:
a current mirror unit, having a first end, a second end and a feedback end; an operation amplifier, having a positive input end, a negative input end and a output end, the output end of the operation amplifier coupled to the feedback end of the current mirror unit; a first resistor, an end of the first resistor coupled to the positive input end of the operation amplifier, another end of the first resistor coupled to the second end of the current mirror unit; a second resistor, an end of the second resistor coupled to positive input end of the operation amplifier; a voltage generation circuit, having a first end and a second end, the second end of the voltage generation circuit coupled to another end of the second resistor; and an auxiliary unit, an end of the auxiliary unit coupled to the negative input end of the operation amplifier and the first end of the voltage generation circuit, another end of the auxiliary unit coupled to the first end of the current mirror unit; wherein the bandgap reference voltage circuit outputs a reference voltage at another end of the auxiliary unit. |
