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1986-08-29
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57 lines
e. CASCODE AMPLIFIER
Now, let's use our device to design a cascode amplifier.
In doing this, we shall make use of the CEB (common-emitter
to common-base) command. This will create the common-gate
configuration that we need for the second device. We shall
also include some of the biasing circuitry so as to demon-
strate the use of the SER (series) command. To begin with,
our circuit is:
J309 ELEMENT PARAMETER
o--o o--o--O TYPE NUM #1 #2 #3
J309 | | | | 1 TWO 1 FILE NAME = J309
o-->|-o ===== & 1 mH 2 CRP 2 51 10000
| |-o _|_ & 3 CEB 3 1
100> o--> | > | 4 CRP 4 15000 1000
K < === < === < | 15K 5 REP 5 100000
| | | | | | 6 SER 6 1 2
O-o--o--o--o--o--o--O 7 SER 7 3 4
.01 .001 8 INP 8 1000000
51 Ohm 9 CAX 9 5 8
10 END 9
We have not included any matching circuitry, as this is a
circuit that we would normall create, analyze, and then store
for future purposes as a network building block. The respone is:
FREQ S11 S22
in GHz MAG ANGLE MAG ANGLE
0.01 1 -2.84 1 -0.48
0.02 0.998 -5.67 1 -1.3
0.03 0.997 -8.49 1 -1.99
0.04 0.994 -11.28 1 -2.67
0.05 0.991 -14.06 0.999 -3.35
0.06 0.987 -16.8 0.999 -4.02
0.07 0.983 -19.51 0.999 -4.7
0.08 0.978 -22.17 0.999 -5.36
0.09 0.973 -24.79 0.999 -6.03
0.1 0.968 -27.36 0.998 -6.7
FREQ S21 S12
in GHz MAG ANGLE MAG ANGLE
0.01 1.481 177.79 0 86.98
0.02 1.479 173.47 0 83.94
0.03 1.473 169.64 0 80.93
0.04 1.465 165.94 0.001 77.94
0.05 1.455 162.31 0.001 74.97
0.06 1.443 158.75 0.001 72.04
0.07 1.429 155.23 0.001 69.14
0.08 1.413 151.76 0.001 66.28
0.09 1.396 148.34 0.001 63.47
0.1 1.377 144.98 0.001 60.71
- 23A -