POP-UP NOISE PREVENTION CIRCUIT, DIGITAL AMPLIFIER INCLUDING THE SAME AND METHOD OF PREVENTING POP-UP NOISE IN AN DIGITAL AMPLIFIER

摘要

A pop-up noise preventing circuit, a digital amplifier including the same, and a method of preventing pop-up noise in a digital amplifier are provided to control the currents of output load by forming a conductive path parallel-connected to the output load. A pop-up noise preventing circuit includes a switch unit(51) and a switch signal generating unit(61). The switch unit, which is parallel-connected with an output resistor formed between an output node and a reference node of a digital amplifier, controls currents flowing into the output resistor by forming a conductive path between the output and reference nodes in response to a switch signal. The switch signal generating unit generates the switch signal in response to a switch control signal of supplying/cutting off power.