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--- soft:cadence:simulations:usefull_calc_formulas [2013/12/19 12:40]
dominik.przyborowski [DAC simulations]
+++ soft:cadence:simulations:usefull_calc_formulas [2019/03/08 14:08] (current)
@@ Line 16: / Line 16: @@
 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>

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