Audio signal muting apparatus using negative power, and digital signal conversion apparatus equipped with same

A digital signal conversion apparatus, comprising:

• a converting unit which converts an input digital audio signal into an analog audio signal;
• a clock generating unit which determines an operation timing to convert the digital audio signal into the analog audio signal based on the digital audio signal;
• an amplifying unit which amplifies the analog audio signal;
• and
• an audio signal muting device which mutes the analog audio signal based on a timing to remove a pop noise,
• wherein the audio signal muting device comprises:
• a mute control unit which removes the pop noise from the analog audio signal;
• a timing setting unit which sets a timing to remove the pop noise from the audio signal;
• and
• a timing adjusting unit which adjusts the timing,
• wherein a negative power is applied to the mute control unit to remove a negative pop noise,
• wherein the timing setting unit and the mute control signal are connected by means of a first control element which performs a switching function, and the timing setting unit and the timing adjusting unit are connected by means of a second control element which performs a switching function, and
• wherein the timing adjusting unit includes:
• a first timing adjusting unit connected to the second control element;
• and
• a second timing adjusting unit connected to the first timing adjusting unit and the mute control unit,
• wherein the first timing adjusting unit is connected to a resistor and the resistor is connected to the negative power.