====== Usefull Cadence Virtuoso ADE Calculator formulas ======

===== DAC simulations =====
  * INL calculation from transient ramp:
<code>
(((abs(value(SIGNAL T_SAMPLE ?period T_PERIOD ?xName "cycle")) - (((ymax(abs(value(SIGNAL T_SAMPLE ?period T_PERIOD ?xName "cycle"))) - ymin(abs(value(SIGNAL T_SAMPLE ?period T_PERIOD ?xName "cycle")))) * (xval(abs(value(SIGNAL T_SAMPLE ?period T_PERIOD ?xName "cycle"))) - 1)) / No_of_STATES)) + ymin(abs(value(SIGNAL T_SAMPLE ?period T_PERIOD ?xName "cycle")))) / ((ymax(abs(value(SIGNAL T_SAMPLE ?period T_PERIOD ?xName "cycle"))) - ymin(abs(value(SIGNAL T_SAMPLE ?period T_PERIOD ?xName "cycle")))) / No_of_STATES))
</code>
  * DNL calculation from transient ramp
<code>
((deriv(value(abs(SIGNAL) T_SAMPLE ?period T_PERIOD ?xName "cycle")) / ((ymax(value(abs(SIGNAL) T_SAMPLE ?period T_PERIOD ?xName "cycle")) - ymin(value(abs(SIGNAL) T_SAMPLE ?period T_PERIOD ?xName "cycle"))) / No_of_STATES)) - 1)
</code>
Where: \\
SIGNAL - signal name, i.e. **IT("/R0/PLUS")** or **VT("/out_dac")** \\
T_SAMPLE - time of first sample  \\
T_PERIOD - sampling period  \\
No_of_STATES = 2^N-1 - number of DAC states (for 8 bit DAC it is 255) \\

===== CSA =====
  * ENC in electrons
<code>
(rmsNoise(F_MIN F_MAX) / ((ymax(VT("OUTPUT_NODE")) - value(VT("OUTPUT_NODE") 0)) / pv("/INPUT_CHARGE" "value" ?result "variables")) / 1.602e-19)
</code>
  * Charge gain
<code>1e-15 * (ymax(VT("OUTPUT_NODE")) - VDC("OUTPUT_NODE")) / pv("/INPUT_CHARGE" "value" ?result "variables")</code>
  * Signal FWHM
<code>(cross(((100 * ((- VT("OUTPUT_NODE")) + value(VT("OUTPUT_NODE") 0))) / ((- ymin(VT("OUTPUT_NODE"))) + value(VT("OUTPUT_NODE") 0))) 50 1 "falling" nil nil) - cross(((100 * ((- VT("OUTPUT_NODE")) + value(VT("OUTPUT_NODE") 0))) / ((- ymin(VT("OUTPUT_NODE"))) + value(VT("OUTPUT_NODE") 0))) 50 1 "rising" nil nil))</code>
Where: \\
F_MIN, F_MAX - frequency range for noise simulation \\
OUTPUT_NODE - output node of CSA \\
INPUT_CHARGE - variable containing input charge value \\

===== AC amplifiers =====
  * Gain--Bandwidth Product
<code>bandwidth(VF("/out_ac") dB20(abs(value(VF("/out_ac") 0))) "low")</code>
<code>cross(dB20(VF("/out_ac")) 0 1 "either" nil nil)</code>