On-chip fully integrated compensation network based on constant transconductance amplifier and capacitance multiplier

Abstract

The invention discloses an on-chip full integration compensation network based on a constant transconductance amplifier and a capacitance multiplier, which can be flexibly applied to a TYPE-I, a TYPE-II and a TYPE-III compensation network structure of a switching DC-DC converter. The on-chip full integration compensation network comprises an impedor Z1, an impedor Z2 and an operational amplifier AMP, wherein an input end of the impedor Z1 is connected to input voltage Vin, and an output end of the impedor Z1 is connected to a first input end of the operational amplifier AMP; an input end of the impedor Z2 is connected to the first input end of the operational amplifier AMP, and an output end of the impedor Z2 is connected to an output end of the operational amplifier AMP; and a second input end of the operational amplifier AMP is connected to reference voltage Vref. According to the invention, the constant transconductance amplifier is adopted to act as an active resistor, the capacitance multiplier acts as an active capacitor, discrete devices such as a passive resistor, a capacitor and the like adopted by the impedor Z1 and the impedor Z2 in a traditional compensation network, thereby realizing on-chip integration, and improving the system integration degree; the on-chip full integration compensation network is simple in structure and easy to design, and has excellent process corner resisting stability; and the design is universal, thereby being convenient for popularization and expansion.

Description

technical field [0001] The invention relates to the fields of semiconductor integrated circuits and DC-DC converters, in particular to an on-chip fully integrated compensation network based on constant transconductance amplifiers and capacitance multipliers applied to switching DC-DC converters. Background technique [0002] In recent decades, driven by the rapid development of the semiconductor industry, portable consumer electronics have played an increasingly important role in modern life. Switching DC-DC converters have been widely used with the development of portable consumer electronics application. Combined with the development trend of electronic products, switching DC-DC converters are widely used in integrated circuits. [0003] In the design of the switching DC-DC converter, it is necessary to add a compensation network to ensure the stability of the system. Depending on the control mode and object of the switching DC-DC converter, the type of compensation netw...

AI Technical Summary

Problems solved by technology

However, the design circuit is complex, the occupied area is relatively large, and the flexibility is poor, which has certain limitations.

Domestic research on the design and research of fully integrated compensation network is still in the blank

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