The following materials are for an amplifier with a gain of 10. If you want to increase or decrease this factor, refer to step 2.
To build this circuit, you will need the materials listed below. Names of specific instruments used in this particular circuit are included in parentheses.
- function generator (BK Precision 4011A 5MHz Function Generator)
- breadboard (Global Specialties Proto-Board PB-503)
- DC power supply (15V, included in our breadboard)
- transistor (Q1 2N3904)
- capacitor - 100nF
- resistors - 56 kOhm, 5.6 kOhm, 6.8 kOhm, 680 Ohm
If you are using this circuit for practical purposes, you can use any DC power supply you desire; keep in mind that your output voltage can not be larger than the voltage provided by this DC power supply. Therefore I would recommend power supplies in the range of 9 to 15V DC. The sine input from the function generator is simply the input that you wish to be amplified.
Additionally, you will likely want something to read or use the output voltage produced by this circuit, depending on your reasons for wanting to build a voltage amplifier. If you are simply looking to investigate the circuit, an oscilloscope can be used to read the output voltage.
Again, this circuit has an voltage gain of 10. For different values of gain, different resistors will be needed (see step 2).