PUBLIC ADDRESS SYSTEM PROVIDING POWER SAVING FUNCTION AND SPEAKER PROTECTING FUNCTION CONCURRENTLY AND POWER SAVING CIRCUIT USED THEREIN
摘要
The present invention relates to a public address system for simultaneously providing a power saving function and a speaker protection function, and a power saving circuit used therein wherein the public address system comprises: a DC/DC converter for converting a voltage of a DC power to a driving voltage of a main amplifier and thereby providing to the main amplifier; a signal generator for generating a Pulse Width Modulation (PWM) signal required for driving the DC/DC converter; and a power saving circuit for starting a power supply to the signal generator from a point of time when a size of a signal inputted from a sound source is in excess of a threshold value corresponding to a minimum size of an audio signal, and for suspending a power supply to the signal generator if a predetermined time has passed from a point of time when a size of signal inputted from a sound source is less than a threshold value.
申请公布号
KR20150117021(A)
申请公布日期
2015.10.19
申请号
KR20140042215
申请日期
2014.04.09
申请人
DONGSEONG C&T CO., LTD.;SEO, BO KYUNG;KANG, PHIL GU;SEO, DONG MOK