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BRIDGE_AMPLIFIER_1

2016-05-18 01:45  
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BRIDGE_AMPLIFIER_1
Two opamps are used in bridge configuration to provida twice the voilage swing across loudspeaker load for given 18-V supply,increasing power capability to about twice that of single amplifier.To eliminate excessive quiescent DC voltage across load,nonpolarized capacitor can be used in series with load or 1-megohm pot can be connected between pins 1 of opampswith position of moving arm adiusted to balance offset voltage Components shown with dashed Iines are added for stability with high-current load.-"Audio Handbook, National Semiconductor,Santa Clara, CA.1977,p 4-21-4-28.