Question

In: Electrical Engineering

Consider an NPN BJT with the following parameters. Beta = 85, Cmu = 1 pF, Co...

Consider an NPN BJT with the following parameters. Beta = 85, Cmu = 1 pF, Co = .5 pF, and Cpi = 6 pF. With IC = 70 mA, r0 = 50 Ohms. RLOAD = 50 Ohms and RSIG = 1K. The available power supply is +12V DC. All coupling caps are 1 uF. Design an amplifier circuit using this transistor with a gain of -50. Calculate the upper and lower 3 dB points of your design. There is a 10% bonus for showing that your circuits works properly in simulation.

Solutions

Expert Solution

Lower 3dB frequency = 53 KHz, Upper 3dB frquency = 100 MHz


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