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

Question

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?

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Circuit Diagram

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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 \$

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Thank you for your help.

Answer 1

Your output resistance is mostly controlled by Rc, which is 4.7k, so you are going to get a lot of loss driving such a small load resistance. To maintain gain and drive the low resistance you need a common collector buffer, as Photon said.