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Share nominal temperature and voltage. Nominal instead of typical.

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This commit is contained in:
Matt Guthaus
2019-09-04 16:53:58 -07:00
parent 585ce63dff
commit 4c3b171b72
5 changed files with 10 additions and 20 deletions
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compiler/base/hierarchy_spice.py
+5 -5
View File
@@ -392,7 +392,7 @@ class spice():
"""Returns delay increase due to voltage.
Implemented as linear factor based off nominal voltage.
"""
return tech.spice['vdd_nominal']/voltage
return tech.spice["nom_supply_voltage"]/voltage
def get_temp_delay_factor(self, temp):
"""Returns delay increase due to temperature (in C).
@@ -400,11 +400,11 @@ class spice():
"""
#Some portions of equation condensed (phi_t = k*T/q for T in Kelvin) in mV
#(k/q)/100 = .008625, The division 100 simplifies the conversion from C to K and mV to V
thermal_voltage_nom = .008625*tech.spice["temp_nominal"]
thermal_voltage = .008625*temp
vthresh = (tech.spice["v_threshold_typical"]+2*(thermal_voltage-thermal_voltage_nom))
thermal_voltage_nom = 0.008625*tech.spice["nom_temperature"]
thermal_voltage = 0.008625*temp
vthresh = (tech.spice["nom_threshold"]+2*(thermal_voltage-thermal_voltage_nom))
#Calculate effect on Vdd-Vth. The current vdd is not used here. A separate vdd factor is calculated.
return (tech.spice['vdd_nominal'] - tech.spice["v_threshold_typical"])/(tech.spice['vdd_nominal']-vthresh)
return (tech.spice["nom_supply_voltage"] - tech.spice["nom_threshold"])/(tech.spice["nom_supply_voltage"]-vthresh)
def return_delay(self, delay, slew):
return delay_data(delay, slew)
compiler/characterizer/simulation.py
+2 -2
View File
@@ -48,8 +48,8 @@ class simulation():
self.slew = tech.spice["rise_time"]*2
self.load = tech.spice["dff_in_cap"]*4
self.v_high = self.vdd_voltage - tech.spice["v_threshold_typical"]
self.v_low = tech.spice["v_threshold_typical"]
self.v_high = self.vdd_voltage - tech.spice["nom_threshold"]
self.v_low = tech.spice["nom_threshold"]
self.gnd_voltage = 0
def create_signal_names(self):