A Digital Proportional-Integral-Derivative Compensation Circuit Based on Dual Signal Paths

Abstract

A digital proportional-integral-differential compensation circuit based on dual signal paths belongs to the technical field of integrated circuits. Including a differential module, a first integral module, a second integral module and a first adder, the input of the first integral module is connected to the input of the differential module and used as the input of the digital proportional-integral-differential compensation circuit, and its output is connected to The first input end of the first adder; The input end of the second integral module connects the output end of the differential module, and its output end connects the second input end of the first adder; The output end of the first adder is used as a digital proportional-integral ‑Output of the differential compensation circuit. Compared with the analog compensation control method, the present invention has the advantages of strong control function, flexible control method, programmability, less number of peripheral devices, advanced correction ability, etc., and reduces the complexity and complexity of loop compensation compared with traditional digital compensation circuits. The number of gate circuits used is reduced, and the circuit gain can be increased while increasing the circuit bandwidth.

Description

technical field [0001] The invention belongs to the technical field of integrated circuits, and relates to a digital proportional-integral-differential compensation circuit (Digital Proportion Integration Differentiation Compensator, DPID) based on dual signal paths, which can be applied to DC-DC switching converters for digital control compensation. Background technique [0002] In the traditional power electronic power conversion control system, analog PID (ie proportional-integral-derivative) control is the most mature and widely used control method. With the popularization and application of computers in the field of control, digital PID control has been more and more widely used in modern power electronic power conversion control systems. In recent years, as the power management function becomes more and more complex, the requirements for the control part continue to increase, and the switching power supply has entered the digital control stage from analog control and a...

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Problems solved by technology

[0005] Aiming at the problem that the above-mentioned analog compensation control method has a single control method and cannot adapt to complex control, the present invention proposes a digital proportional-integral-differential compensation circuit based on dual signal paths. Compared with the analog compensation control method, it can play The advantages of digital signal processors, stronger control functions, short design cycle, flexible control methods, programmability, fewer peripheral devices, advanced correction capabilities, etc.; and only two channels are used, compared with traditional digital compensation The proportional, integral and differential paths used by the circuit reduce the complexity of loop compensation and the number of gate circuits used, especially for DC-DC switching converters

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