- Band-gap reference circuit and method of optimizing the reference voltage thereof

摘要

The present invention is output in accordance with a cascade current source circuit, the cascade and soft bias circuit for generating a constant reference voltage according to an output of the current source circuit, the output of said soft bias circuit having a current path of a pair the through output voltage feed for generating a reference voltage for the optimization of the internal voltage-but comprises a back-circuit, the soft-bias circuit between the first and the second voltage source, a pair of PMOS, trim elements and transistors are in series and it characterized in that the connection, the reference voltage generation for the optimization of the internal voltage, and is obtained through a soft-program operation of the trimming cells, by using the erasing bias erase trimmed cell and setting the program mode, the program bias the trim cells performing a soft program in the process, and that the Continue to monitor the output voltage in a soft program process, the desired band-process for performing soft program until the gap reference voltage and a reference voltage, and trimming an end when turned on to complete a soft program and switches to the normal mode by the switching system chips ( chip) band made of a process of optimizing the circuit on-gap reference circuit and provides a reference voltage at its optimization.