Diode-Bridge Voltage-Controlled Attenuator - simulation/results/small_vc_2.log

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John Lauer Saif Abdessayed's diode-bridge VCA: KiCad project, Gerbers, BOM, simulations, reports, and the earlier RC filter test 45f3ff6 11d ago

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Circuit: * diode-bridge voltage-controlled attenuator

Doing analysis at TEMP = 27.000000 and TNOM = 27.000000

Using SPARSE 1.3 as Direct Linear Solver

Initial Transient Solution
--------------------------

Node                                   Voltage
----                                   -------
vcc                                         12
vee                                        -12
ctrl                                         2
ctrlf                                   1.9802
in                                           0
bufin                                        0
buf                                          0
out                                          0
bra                                    6.13215
bra_i                                  6.13215
brb_i                                  6.13215
brb                                    6.13215
brp                                     6.6371
brn                                    5.62722
opout                                  2.61819
sense                                  1.98017
base                                   2.60806
bop#branch                        -2.15581e-06
e_buf#branch                                 0
vin#branch                                   0
vctrl#branch                       -1.9802e-06
vee#branch                                   0
vcc#branch                        -0.000243768


No. of Data Rows : 10001

  Measurements for Transient Analysis

vout_pp             =  1.546882e-02 from=  2.000000e-02 to=  3.000000e-02
vin_pp              =  9.999938e-02 from=  2.000000e-02 to=  3.000000e-02
gain                =  1.54689e-01

Fourier analysis for v(out):
  No. Harmonics: 10, THD: 0.0477734 %, Gridsize: 200, Interpolation Degree: 1

Harmonic Frequency   Magnitude   Phase       Norm. Mag   Norm. Phase
-------- ---------   ---------   -----       ---------   -----------
 0       0           2.32975e-05 0           0           0          
 1       1000        0.00773074  -0.1734     1           0          
 2       2000        1.72858e-06 -89.794     0.000223598 -89.621    
 3       3000        3.26373e-06 -179.91     0.000422175 -179.74    
 4       4000        5.90922e-09 33.3351     7.64379e-07 33.5085    
 5       5000        6.11211e-09 2.99536     7.90624e-07 3.16875    
 6       6000        3.29125e-09 5.31891     4.25735e-07 5.49231    
 7       7000        2.82671e-09 6.26899     3.65645e-07 6.44238    
 8       8000        2.48172e-09 7.17398     3.21019e-07 7.34738    
 9       9000        2.20612e-09 8.05641     2.85369e-07 8.22981    




Total analysis time (seconds) = 0.138

Total elapsed time (seconds) = 0.148 

Total DRAM available = 3647.488 MB.
DRAM currently available =  569.441 MB.
Maximum ngspice program size =   21.945 MB.
Current ngspice program size =   13.949 MB.

Shared ngspice pages =   11.512 MB.
Text (code) pages =    6.156 MB.
Stack = 0 bytes.
Library pages =    2.699 MB.