Current biasing circuit and method for improving positive temperature coefficient

• Main Authors: LOU WENFENG, LING YU, XIE XUN, SHENG WENJUN
• Format: Patent
• Language: Chinese; English
• Published: 26.10.2016
• Subjects: CONTROLLING; PHYSICS; REGULATING; SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES

The invention relates to the field of integral circuit design, and discloses a current biasing circuit and a method for improving a positive temperature coefficient. The current biasing circuit for increasing the positive temperature coefficient includes a current source proportional to the absolute temperature, a first triode and a first resistor; an input end of the current source is connected to a power source end of the current biasing circuit, and an output end of the current source is connected to a collector electrode and a base electrode of the first triode and one end of the first resistor; the other end of the first resistor is connected to a ground; the current of an emission electrode of the first triode serves as the reference output current, and then the current is applied to a circuit module through mirror image output. The current biasing circuit can generate the biasing current capable of improving the positive temperature coefficient, and can be used for a certain radio-frequency circuit so