| 摘要 |
A power amplifier circuit (100) drives a load (L1) with a convergence correction current (ICORR) which is proportional to a convergence correction voltage waveform (20) that is applied to the power amplifier circuit. A predriver stage 30 of the power amplifier circuit comprises first (Q5) and second (Q7) transistors in a push-pull configuration. First (R5 and R139) and second (R7 and R140) voltage divider networks bias emitter electrodes of the first and second transistors, respectively, so that a common-mode current flow between the first and second transistors is limited. The first and second voltage dividers also protect the first and second transistors, respectively, from damage caused by thermal runaway. <IMAGE>
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