Design a single-transistor amplifier that delivers at least ten times as much power to the load as it draws from the source.

Electrical Engineering: Single-Transistor Amplifier
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Design a single-transistor amplifier that delivers at least ten times as much power to the load as it draws from the source. In other words, the power gain must be at least 10 (10dB). The signal source has a resistance of 10kΩ and the load has a resistance of 1kΩ. Your power supply is 5V. You are allowed to use a BJT or a MOSFET, as well as any amplifier configuration of your choosing.

A SPICE template file has already been created for you and is available for download from Blackboard. It contains all the information you need besides the actual circuit. Follow the instructions given and add the rest of your circuit to make it complete. Use the instructions and analysis commands given to evaluate your amplifier.

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In order to do a hand analysis with the MOSFET, you need to know the transistor parameters. The MOSFET given in the template has Vt = 1V and kn’ = 35.9μA/V2. I have fixed the W/L ratio at 500, giving kn = 17.9mA/V2. Do not change W or L.

If you use the BJT, assume β = 70.

In addition to the basic performance requirement above, a pool of bonus points will be awarded to the top performing designs. These bonus points will apply to your final grade in the course. The pool is for the entire class and will be divided up amongst the best performers. You can receive points from more than one category. The pool total is as follows:

Overall voltage gain (40 points)
Highest input resistance (40 points)
Lowest output resistance (40 points)
Lowest DC power consumption (40 points)

 

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