TDA7294 - Amplifier
This large-signal, high-power buffer must be capable of handling extremely high current and voltage levels while
maintaining acceptably low harmonic distortion and good behaviour over frequency response; moreover, an
accurate control of quiescent current is required.
A local linearizing feedback, provided by differential amplifier A, is used to fullfil the above requirements, allowing
a simple and effective quiescent current setting.
Proper biasing of the power output transistors alone is however not enough to guarantee the absence of
crossover distortion.
While a linearization of the DC transfer characteristic of the stage is obtained, the dynamic behaviour of the
system must be taken into account.
A significant aid in keeping the distortion contributed by the final stage as low as possible is provided by the
compensation scheme, which exploits the direct connection of the Miller capacitor at the amplifier’s output to
introduce a local AC feedback path enclosing the output stage itself. Today in this video I've shown a power amplifier using TDA-7294.
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music use:
笑纳 (DJ沈念版).