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- 1.
- Set up the EF circuit of Fig. 2.12 using the following values
.
- 2.
- Theoretically calculate the voltage gain, the input resistance and
the output resistance.
- 3.
- Set the waveform generator to 100KHz, and measure the voltage gain.
- 4.
- Place a 1K source resistor between the signal generator and C1.
Now measure the gain as well as the signal voltage at the base.
Trade the 1K for a 10K resistor and
repeat your measurements. From your measurements determine the input resistance
of the circuit.
- 5.
- With the source resistor still in place, place a 10K load resistor
at the output from C2 to ground. Measure the voltage gain.
Repeat your measurements with 1K and 500 load resistors.
From your measurements, determine the output resistance of the circuit.
- 6.
- Compare your measured results with the theoretical calculations,
Does the experiment help describe the utility of the EF amp?
To help understand this, consider what would have happened
to the signal if
the EF were not there, and the 1K load were attached directly
from RS to ground?
Neil Goldsman
10/23/1998