OTL Power Amplifier Principle Circuit

Published:2011/7/29 18:41:00 Author:Robert | Keyword: OTL, Power, Amplifier, Principle | From:SeekIC

2.The analysis for otl power amplifier principle. The features of the otl power amplifier are listed here. (1)When static there is no current through RL. (2)D1, D2 or R, or R, D, would supply the T1, T2 two transistors a certain positive bias voltage to make them in micro-conduction mode, which means working in class AB. (3)RC3 is T3's collector polar's load resistance. b1, b2 these two points' voltage difference is about 1.4V all the way. But their AC voltage's variation values are the same. (4)When it only needs a single power and it also adds a capacitor C, the selection of C should meet:C should be large enough (larger than Vi's maximum cycle time) to make Vc=0.5Vcc. (5)T3's bias voltage is get from the K point. It has the function that make the Q point stable automatically and it could adjust the Vk by adjusting R2.



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