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Text File  |  1983-10-04  |  3KB  |  57 lines
  1.     e.  CASCODE AMPLIFIER
  2.  
  3.          Now, let's use our device to design a cascode amplifier.
  4.     In doing this, we shall make use of the CEB (common-emitter
  5.     to common-base) command.  This will create the common-gate
  6.     configuration that we need for the second device.  We shall
  7.     also include some of the biasing circuitry so as to demon-
  8.     strate the use of the SER (series) command.  To begin with,
  9.     our circuit is: 
  10.  
  11.                                        ELEMENT          PARAMETER
  12.                                       TYPE  NUM    #1      #2      #3
  13.                                     1  TWO  1    FILE NAME = J309
  14.                                     2  CRP  2    51      10000
  15.                                     3  CEB  3    1
  16.                                     4  CRP  4    15000   1000
  17.                                     5  REP  5    100000
  18.                                     6  SER  6    1       2
  19.                                     7  SER  7    3       4
  20.                                     8  INP  8    1000000
  21.                                     9  CAX  9    5       8
  22.                                     10 END  9
  23.  
  24.          We have not included any matching circuitry, as this is a
  25.     circuit that we would normall create, analyze, and then store 
  26.     for future purposes as a network building block.  The respone is:
  27.  
  28.                      FREQ        S11            S22
  29.                     in GHz   MAG    ANGLE   MAG    ANGLE
  30.                     0.01    1      -2.84   1      -0.48
  31.                     0.02    0.998  -5.67   1      -1.3
  32.                     0.03    0.997  -8.49   1      -1.99
  33.                     0.04    0.994  -11.28  1      -2.67
  34.                     0.05    0.991  -14.06  0.999  -3.35
  35.                     0.06    0.987  -16.8   0.999  -4.02
  36.                     0.07    0.983  -19.51  0.999  -4.7
  37.                     0.08    0.978  -22.17  0.999  -5.36
  38.                     0.09    0.973  -24.79  0.999  -6.03
  39.                     0.1     0.968  -27.36  0.998  -6.7
  40.  
  41.                      FREQ        S21            S12
  42.                     in GHz   MAG    ANGLE   MAG    ANGLE
  43.                     0.01    1.481  177.79  0      86.98
  44.                     0.02    1.479  173.47  0      83.94 
  45.                     0.03    1.473  169.64  0      80.93
  46.                     0.04    1.465  165.94  0.001  77.94
  47.                     0.05    1.455  162.31  0.001  74.97
  48.                     0.06    1.443  158.75  0.001  72.04
  49.                     0.07    1.429  155.23  0.001  69.14
  50.                     0.08    1.413  151.76  0.001  66.28
  51.                     0.09    1.396  148.34  0.001  63.47
  52.                     0.1     1.377  144.98  0.001  60.71
  53.  
  54.  
  55.  
  56.                                   - 23 -
  57.