High Capacitance Line Driver

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Capacitive loads invite amplifier instability by reducing phase margin. Instability can be prevented by isolating the load capacitance from the amplifier output by a small resistor R3. To eliminate a voltage drop error when current is drawn through that resistor, DC feedback is sensed on the load side of R3. High- frequency feedback is provided by C2.

  • parametric gain analysis gain and phase


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