Method for reducing current consumption of digital-to-analog conversion, and associated tri-state current digital-to-analog converter

摘要

A method for reducing current consumption of digital-to-analog conversion includes: monitoring logical states of a set of differential digital inputs, wherein the set of differential digital inputs are utilized for controlling at least one tri-state current Digital-to-Analog Converter (DAC) cell of a tri-state current DAC, and the tri-state current DAC cell has a positive output current state, a zero output current state and a negative output current state; and when the logical states of the set of differential digital inputs instruct the tri-state current DAC cell should output no positive/negative current, controlling the tri-state current DAC cell to switch to the zero output current state, temporarily decreasing a direct current passing through a middle path of the tri-state current DAC cell. An associated tri-state current DAC is also provided, where the tri-state current DAC includes: the at least one tri-state current DAC cell; and a control device.