# How to remove degradation in voltage gain when replacing the original $R_L$ with a small value resistor?

For the following common-emitter amplifier, the original $R_L = 4.7\space kΩ$. When I replace it with a small value resistor ($100\spaceΩ$), the voltage gain will drop. Is there any way to drive the new low-impedance load without causing the degradation in the voltage gain?

Circuit Diagram

SetUp Details

$\space \space \space \space \space \space \space \space R_G=600\space Ω \\ \space \space \space \space \space \space \space \space R_1=82\space kΩ \\ \space \space \space \space \space \space \space \space R_2=15\space kΩ \\ \space \space \space \space \space \space \space \space R_C=4.7\space kΩ\\ \space \space \space \space \space \space \space \space R_E=910\space Ω \\ \space \space \space \space \space \space \space \space R_L=4.7\space kΩ$

Thank you for your help.

• Recalculate and redesign for the new operating point with the new load. – Eugene Sh. Feb 25 '15 at 18:09
• Or add a buffer stage to the output. – The Photon Feb 25 '15 at 18:13
• Add an emitter follower (comon collector) or a full push pull stage. – jippie Feb 25 '15 at 18:21