RPLY_BIAS simulation
Electrical verification of the top level bias block
To run all simulations do “make all”
Loop stability analysis (lstb)
Uses Tian/Middelbrook to check the phase-margin of the RPLY_BIAS circuit
Name | Parameter | Description | Min | Typ | Max | Unit | |
---|---|---|---|---|---|---|---|
Bandwidth | f3db | Spec | 10.000 | 150.000 | 300.000 | kHz | |
Sch_typ | 37.907 | ||||||
Sch_etc | 23.807 | 37.686 | 54.634 | ||||
Sch_3std | 26.953 | 37.881 | 48.808 | ||||
Sch_std | 34.238 | 37.881 | 41.523 | ||||
Gain Margin | gm_db | Spec | -50.00 | -10.00 | -10.00 | dB | |
Sch_typ | -11.46 | ||||||
Sch_etc | -14.94 | -12.22 | -9.27 | ||||
Sch_3std | -14.14 | -11.71 | -9.29 | ||||
Sch_std | -12.52 | -11.71 | -10.90 | ||||
DC gain | lf_gain | Spec | 35.00 | 40.00 | 55.00 | dB | |
Sch_typ | 47.57 | ||||||
Sch_etc | 45.18 | 47.20 | 48.75 | ||||
Sch_3std | 45.22 | 47.54 | 49.86 | ||||
Sch_std | 46.76 | 47.54 | 48.31 | ||||
Phase Margin | pm_deg | Spec | 45.00 | 60.00 | 75.00 | ||
Sch_typ | 49.41 | ||||||
Sch_etc | 39.48 | 52.30 | 60.55 | ||||
Sch_3std | 40.51 | 50.18 | 59.85 | ||||
Sch_std | 46.96 | 50.18 | 53.41 | ||||
Unity Gain Frequency | ug | Spec | 3.00 | 1.50 | 15.00 | MHz | |
Sch_typ | 8.26 | ||||||
Sch_etc | 4.66 | 7.46 | 11.75 | ||||
Sch_3std | 5.82 | 8.24 | 10.66 | ||||
Sch_std | 7.44 | 8.24 | 9.05 | ||||
PMOS gate | v(lpo) | Spec | 0.40 | 1.00 | 1.30 | V | |
Sch_typ | 0.79 | ||||||
Sch_etc | 0.54 | 0.81 | 1.12 | ||||
Sch_3std | 0.77 | 0.79 | 0.82 | ||||
Sch_std | 0.78 | 0.79 | 0.80 | ||||
Diode voltage | v(xdut.vd1) | Spec | 0.50 | 1.00 | 1.30 | V | |
Sch_typ | 0.75 | ||||||
Sch_etc | 0.58 | 0.72 | 0.85 | ||||
Sch_3std | 0.74 | 0.75 | 0.75 | ||||
Sch_std | 0.74 | 0.75 | 0.75 | ||||
VD Error | vdiff | Spec | -2.00 | 0.00 | 2.00 | mV | |
Sch_typ | -0.18 | ||||||
Sch_etc | -2.74 | -0.37 | 1.13 | ||||
Sch_3std | -25.76 | -1.48 | 22.80 | ||||
Sch_std | -9.58 | -1.48 | 6.61 |
Transient analysis (tran)
Check transient operation, and make sure it starts up
Name | Parameter | Description | Min | Typ | Max | Unit | |
---|---|---|---|---|---|---|---|
Delta VD error | dvderr | Spec | -10.000 | 0.000 | 10.000 | mV | |
Sch_typ | 2.019 | ||||||
Sch_etc | -0.087 | 2.441 | 6.022 | ||||
Sch_3std | -25.407 | 1.589 | 28.584 | ||||
Sch_std | -7.410 | 1.589 | 10.587 | ||||
OTA input offset | offset | Spec | -10.00 | 0.00 | 10.00 | mV | |
Sch_typ | 0.14 | ||||||
Sch_etc | -1.28 | 0.27 | 2.69 | ||||
Sch_3std | -25.34 | 0.17 | 25.69 | ||||
Sch_std | -8.33 | 0.17 | 8.68 | ||||
Bias current | ibp_1u_0 | Spec | 0.55 | 0.78 | 1.09 | uA | |
Sch_typ | 0.78 | ||||||
Sch_etc | 0.61 | 0.80 | 1.00 | ||||
Sch_3std | 0.38 | 0.79 | 1.19 | ||||
Sch_std | 0.65 | 0.79 | 0.92 | ||||
Bias current | ibp_1u_1 | Spec | 0.55 | 0.78 | 1.09 | uA | |
Sch_typ | 0.78 | ||||||
Sch_etc | 0.61 | 0.80 | 1.00 | ||||
Sch_3std | 0.34 | 0.77 | 1.20 | ||||
Sch_std | 0.63 | 0.77 | 0.91 | ||||
Bias current | ibp_1u_2 | Spec | 0.55 | 0.78 | 1.09 | uA | |
Sch_typ | 0.78 | ||||||
Sch_etc | 0.61 | 0.80 | 1.00 | ||||
Sch_3std | 0.39 | 0.80 | 1.20 | ||||
Sch_std | 0.66 | 0.80 | 0.93 | ||||
Bias current | ibp_1u_3 | Spec | 0.55 | 0.78 | 1.09 | uA | |
Sch_typ | 0.78 | ||||||
Sch_etc | 0.61 | 0.80 | 1.00 | ||||
Sch_3std | 0.45 | 0.78 | 1.11 | ||||
Sch_std | 0.67 | 0.78 | 0.89 | ||||
Active current | i_active | Spec | 10.00 | 30.00 | 50.00 | uA | |
Sch_typ | 26.97 | ||||||
Sch_etc | 21.62 | 27.39 | 34.36 | ||||
Sch_3std | 17.97 | 26.74 | 35.50 | ||||
Sch_std | 23.81 | 26.74 | 29.66 | ||||
Power down current | i_pwrdwn | Spec | 0.00 | 0.00 | 10.00 | nA | |
Sch_typ | 84.89 | ||||||
Sch_etc | 60.11 | 110.02 | 223.46 | ||||
Sch_3std | 83.60 | 85.07 | 86.54 | ||||
Sch_std | 84.58 | 85.07 | 85.56 |
Temperature sweep (tsweep)
Temperature sweep to check vref accuracy variation with temperature
Name | Parameter | Description | Min | Typ | Max | Unit | |
---|---|---|---|---|---|---|---|
OTA input offset | offset_max | Spec | -10.00 | 0.00 | 10.00 | mV | |
Sch_typ | 1.36 | ||||||
Sch_etc | 0.18 | 1.37 | 2.69 | ||||
Sch_3std | -25.00 | 1.50 | 28.00 | ||||
Sch_std | -7.33 | 1.50 | 10.34 | ||||
OTA input offset | offset_min | Spec | -10.00 | 0.00 | 10.00 | mV | |
Sch_typ | -0.47 | ||||||
Sch_etc | -1.24 | -0.49 | 0.34 | ||||
Sch_3std | -24.46 | -1.08 | 22.30 | ||||
Sch_std | -8.87 | -1.08 | 6.72 | ||||
Current at 25C | ibp | Spec | 2.700 | 3.000 | 3.300 | uA | |
Sch_typ | 3.116 | ||||||
Sch_etc | 3.089 | 3.115 | 3.143 | ||||
Sch_3std | 1.977 | 3.079 | 4.181 | ||||
Sch_std | 2.712 | 3.079 | 3.447 | ||||
Temp Coefficient | ibp_max_ppm_c | Spec | 2400.0 | 3000.0 | 3600.0 | ppm/C | |
Sch_typ | 3454.5 | ||||||
Sch_etc | 3437.3 | 3455.5 | 3478.3 | ||||
Sch_3std | 2325.7 | 3523.9 | 4722.1 | ||||
Sch_std | 3124.5 | 3523.9 | 3923.3 | ||||
Temp Coefficient | ibp_typ_ppm_c | Spec | 2400.0 | 3000.0 | 3600.0 | ppm/C | |
Sch_typ | 3003.5 | ||||||
Sch_etc | 2981.8 | 3004.1 | 3026.3 | ||||
Sch_3std | 1883.7 | 3070.7 | 4257.8 | ||||
Sch_std | 2675.1 | 3070.7 | 3466.4 | ||||
Temp Coefficient | ibp_min_ppm_c | Spec | 2400.0 | 3000.0 | 3600.0 | ppm/C | |
Sch_typ | 2480.6 | ||||||
Sch_etc | 2450.2 | 2482.7 | 2509.0 | ||||
Sch_3std | 1352.1 | 2551.4 | 3750.7 | ||||
Sch_std | 2151.7 | 2551.4 | 2951.2 |