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    LM1875 amplifier circuit with high and low adjustment ----- lm1875 amplifier

     

    LM1875 amplifier circuit with high and low adjustment LM1875 power amplifier integrated circuit main parameters: Voltage range: 16 ~ 60V Static current: 50mA Output power: 25W Harmonic distortion: <0.02%, when="" f="1kHz," rl="8Ω," p0="20W" rated="" gain:="" 26db,="" when="" f="1kHz" working="" voltage:="" ±="" 25v="" conversion="" rate:="" 18v="" μs="" package="" structure:="" to-220="" built-in="" protection:="" overheated="" overheating="" and="" inductive="" load="" reverse="" potential="" safety="" work="" protection="" lm1875="" amplifier="" circuit="" with="" high="" and="" low="" adjustment="" the="" circuit="" consists="" of="" a="" highly="" low-controlled="" attenuated="" tone="" control="" circuit="" and="" the="" lm1875="" amplifier="" circuit,="" and="" three="" parts="" of="" the="" power="" supply="" circuit.="" the="" tone="" portion="" is="" used="" as="" a="" highly="" low-controlled="" attenuated="" tone="" circuit,="" wherein="" r02,="" r03,="" c02,="" c01,="" w02="" constitute="" a="" bass="" control="" circuit;="" c03,="" c04,="" w03="" constitute="" a="" treble="" control="" circuit;="" r04="" is="" an="" isolation="" resistor,="" w01="" is="" volume="" control="" the="" volume="" size="" of="" the="" amplifier="" is="" adjusted,="" and="" the="" c05="" is="" a="" corrupted="" capacitor="" to="" prevent="" the="" effect="" of="" the="" lm1875="" dc="" potential="" on="" the="" post-level="" tone="" circuit.="" the="" amplifying="" circuit="" mainly="" employs="" 1875,="" r08,="" r09,="" c066,="" and="" the="" like,="" and="" the="" magnification="" of="" the="" circuit="" is="" determined="" by="" the="" ratio="" of="" r08="" and="" r09,="" and="" c06="" is="" used="" to="" stabilize="" the="" drift="" of="" the="" fourth="" foot="" of="" the="" lm1875,="" but="" there="" is="" a="" certain="" amount="" for="" the="" sound="" quality.="" the="" role="" of="" the="" c07="" and="" r10="" is="" to="" prevent="" the="" amplifier="" from="" producing="" low="" frequency="" self-excitement.="" the="" load="" impedance="" of="" this="" amplifier="" is="" 4="" →="" 16ω.="" power="" part="" in="" order="" to="" ensure="" the="" quality="" of="" the="" play,="" the="" output="" power="" of="" the="" power="" transformer="" must="" not="" be="" less="" than="" 80w,="" the="" output="" voltage="" is="" 2="" *="" 25v,="" the="" filter="" capacitor="" is="" parallel,="" the="" positive="" and="" negative="" power="" supply="" shares="" 4="" 2200μf="" 25v="" capacitance,="" two="" 104="" the="" monolithic="" capacitor="" is="" a="" high="" frequency="" filter="" capacitor,="" which="" is="" conducive="" to="" the="" sound="" quality="" of="" the="" amplifier.="">

     

     

     

     

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