Digital-to-analog conversion device and method

A digital-to-analog conversion device, comprising:

• a control module, n conversion modules, an adder and a feedback module;
• wherein n is an integer greater than or equal to 2, each of the n conversion modules comprises one conversion coefficient, and n conversion coefficients comprised in the n conversion modules increase progressively;
• the control module is electrically connected to the n conversion modules;
• the control module is configured to:
• split an input digital signal into n intermediate digital portions, divide each of the n intermediate digital portions by a conversion coefficient of a conversion module corresponding to the each of the n intermediate digital portions to obtain n intermediate digital signals, and transmit the n intermediate digital signals to the n conversion modules which are in one-to-one correspondence with the n intermediate digital signals;
• wherein the n intermediate digital portions increase progressively;
• each of the n conversion modules is configured to perform digital-to-analog conversion on an intermediate digital signal corresponding to the each of the n conversion modules, wherein a converted result of the intermediate digital signal comprises the conversion coefficient of each of the n conversion modules;
• the n conversion modules are each electrically connected to the adder;
• and the adder is configured to add up output signals of the n conversion modules to obtain an analog signal and output the analog signal;
• and
• the feedback module is configured to collect the analog signal and obtain a feedback signal according to the analog signal;
• and the control module is further configured to acquire the feedback signal, and adjust allocation of the n intermediate digital portions according to a target digital signal and the feedback signal.