5ed4b506_CB_vs__MCM_c_Comparison_Matrix__1
[0] Active device variability [2] Potentiometers and variable capacitors used to compensate for variability [3] Active trimming of printed integral resistors and capacitors on the circuit substrate [1] 
Active devices have broad specifications (wide tolerances)
Appendix A: A PCB vs. MCM-c Comparison Matrix
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