Laboratory Manual - King Fahd University of Petroleum and Minerals
Laboratory Manual - King Fahd University of Petroleum and Minerals
Laboratory Manual - King Fahd University of Petroleum and Minerals
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-<br />
+<br />
g m1<br />
*(v1-v2)<br />
g m2<br />
*v3<br />
g m3<br />
*v7<br />
Table I: H<strong>and</strong> calculation for prelab.<br />
R 2 DC gain BW GB<br />
1k<br />
10k<br />
100k<br />
2. Design a two stage amplifier to provide total gain <strong>of</strong> 100V/V such that<br />
(a) Each stage provides gain <strong>of</strong> -10V/V.<br />
(b) The first stage provides gain <strong>of</strong> -5V/V while the second stage provides gain <strong>of</strong><br />
-20V/V.<br />
3. Estimate the BWs <strong>of</strong> the two amplifiers required by step 2.<br />
SPICE Simulation:<br />
4. Using SPICE simulate the different amplifiers <strong>of</strong> step 1 <strong>and</strong> 2 <strong>and</strong> submit the<br />
output waveforms for each case. Use a more detailed model for simulation opamps<br />
as shown in Figure 3. This model is more sophisticated than the first model<br />
presented in Experiment 3, as it models the finite input resistance, the finite<br />
differential gain, the finite output resistance, the frequency dependence <strong>of</strong> the<br />
differential gain <strong>and</strong> the limiting characteristics <strong>of</strong> the op-amp.<br />
(1)<br />
C 1<br />
(3)<br />
R 1<br />
C 2<br />
(7)<br />
R 2<br />
(4)<br />
R DL1 DL2<br />
0<br />
R in<br />
VL1<br />
VL2<br />
(2)<br />
(0)<br />
(0)<br />
(0)<br />
* V- V+ Vo<br />
.SUBCKT OPAMP 2 1 4<br />
RIN 1 2 2MEG<br />
GM1 0 3 1 2 20m<br />
R1 3 0 1MEG<br />
C1 3 0 0.031uF<br />
GM2 0 7 3 0 10m<br />
R2 7 0 1K<br />
C2 7 0 39.8pF<br />
GM3 0 4 7 0 1m<br />
R0 4 0 1K<br />
40
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