Hi all, I got some doubts on theoretical concepts, Maximum power transfer theorem states that maximum power is supplied to the load when load resistance is equal to output impedance. so in that case , efficiency will be only 50% . But class C ,D amplifiers claim more than 50% efficiency. If we match impedance , will it reduce their efficiency ? regards, palani -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist