Patent ID: 9088252
Filing Date: 2015-07-21
Classification: H03F

Abstract:
1. A fixed voltage generating circuit comprising: a first resistor having a first end and a second end, the second end of the first resistor being coupled to a voltage source; a first transistor having a first end, a second end, and a control end, the control end of the first transistor being coupled to the first end of the first resistor, the first end of the first transistor being coupled to a ground node, and the second end of the first transistor being coupled to the control end of the first transistor; a second transistor having a first end, a second end, and a control end, the control end of the second transistor being coupled to the control end of the first transistor, and the first end of the second transistor being coupled to the ground node; a third transistor having a first end, a second end, and a control end, the control end of the third transistor being configured to receive a first differential voltage, and the first end of the third transistor being coupled to the second end of the second transistor; a fourth transistor having a first end, a second end, and a control end, the control end of the fourth transistor being configured to receive a second differential voltage, and the first end of the fourth transistor being coupled to the second end of the second transistor; a second resistor having a first end and a second end, the first end of the second resistor being coupled to the second end of the third transistor, and the second end of the second resistor being coupled to the voltage source; and a third resistor having a first end and a second end, the first end of the third resistor being coupled to the second end of the fourth transistor, and the second end of the third resistor being coupled to the voltage source; wherein a resistance of the second resistor and a resistance of the third resistor are related to a resistance of the first resistor.