Built-in Regulator circuit with temperature compensation and implementation method thereof

Abstract

The invention provides a built-in Regulator circuit with temperature compensation. Under the condition that a band-gap reference circuit module does not need to be specially designed in the chip and loop compensation is not needed at the output end, stable and reliable working voltage for other modules to work normally is generated in the circuit when the chip inputs high voltage, the designed circuit in the chip is simple, and the standby current of the circuit of the chip is very small when the chip works. The output voltage can be effectively compensated by various devices according to thetemperature change, and the output voltage is not influenced by the temperature and is not stable, so that the normal operation of the chip in various temperature environments is ensured. The circuitis simple to realize, and is suitable for various current common high-voltage CMOS process circuits. The circuit is safe and reliable in use process, saves the cost, and greatly shortens the researchand development period.

Description

technical field [0001] The invention relates to the field of circuits, in particular to a high-voltage CMOS process circuit. Background technique [0002] With the rapid development of the integrated circuit industry, people have higher and higher requirements for the integration of chips, but smaller and smaller chip areas, which requires continuous simplification of the circuit design inside the chip. At present, the general design of the Regulator circuit inside the traditional chip is as follows: figure 1 Shown: The circuit includes circuit bias circuit, start-up circuit, bandgap reference circuit, op amp circuit, N-channel enhanced MOS tube, op amp compensation resistor and feedback resistor, and the bias current is generated by the current bias circuit in the circuit , start the bandgap reference circuit through the starting circuit, and then perform output loop compensation through the operational amplifier circuit and capacitor. Using this traditional design method...

AI Technical Summary

Problems solved by technology

Using this traditional design method not only makes the internal circuit complex and the standby circuit of the chip itself is very large, but also when the chip is used in a high-voltage circuit, many high-voltage devices are used in the chip, resulting in a larger chip area. A compensation circuit must be specially designed at the output end for stability compensation, and some capacitors are required for output compensation, which increases the design area of ​​the chip and makes the design cost of the chip higher.

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