A brief review of the constraints and stresses on the output stage transistors of Class-B and Class-H power amplifiers is presented. The cases considered are simple resistive loading, first-order reactive loading, and complex reactive loading by a real loudspeaker or electrical equivalent model. Several simple relations are presented to aid in the thermal design of the output stage. A way of obtaining junction temperature versus time for a complex power waveform is introduced. A computer program is introduced as a design tool and tutorial aid, providing graphical and numerical output not as easily obtainable otherwise.
(See document for exact affiliation information.)
Click to purchase paper as a non-member or login as an AES member. If your company or school subscribes to the E-Library then switch to the institutional version. If you are not an AES member Join the AES. If you need to check your member status, login to the Member Portal.
