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 | 1.000 | 3.000 | 15.000 | kHz | |
Sch_typ | 3.816 | ||||||
Sch_etc | 1.900 | 4.396 | 12.638 | ||||
Sch_std | 3.644 | 3.814 | 3.983 | ||||
Gain Margin | gm_db | Spec | -50.00 | -10.00 | -10.00 | dB | |
Sch_typ | -19.62 | ||||||
Sch_etc | -23.71 | -20.00 | -16.95 | ||||
Sch_std | -20.16 | -19.62 | -19.08 | ||||
DC gain | lf_gain | Spec | 35.00 | 40.00 | 55.00 | dB | |
Sch_typ | 49.33 | ||||||
Sch_etc | 35.56 | 48.79 | 49.99 | ||||
Sch_std | 48.96 | 49.35 | 49.74 | ||||
Phase Margin | pm_deg | Spec | 45.00 | 60.00 | 90.00 | ||
Sch_typ | 76.95 | ||||||
Sch_etc | 72.62 | 77.23 | 80.72 | ||||
Sch_std | 75.92 | 76.85 | 77.78 | ||||
Unity Gain Frequency | ug | Spec | 0.50 | 1.00 | 10.00 | MHz | |
Sch_typ | 1.15 | ||||||
Sch_etc | 0.53 | 1.07 | 1.78 | ||||
Sch_std | 1.06 | 1.15 | 1.24 | ||||
PMOS gate | v(lpo) | Spec | 0.45 | 0.70 | 1.10 | V | |
Sch_typ | 0.72 | ||||||
Sch_etc | 0.49 | 0.74 | 1.01 | ||||
Sch_std | 0.72 | 0.72 | 0.73 | ||||
Diode voltage | v(xdut.vd1) | Spec | 0.50 | 0.70 | 1.00 | V | |
Sch_typ | 0.75 | ||||||
Sch_etc | 0.58 | 0.72 | 0.85 | ||||
Sch_std | 0.75 | 0.75 | 0.75 | ||||
VD Error | vdiff | Spec | -6.00 | 0.00 | 6.00 | mV | |
Sch_typ | -0.75 | ||||||
Sch_etc | -3.65 | -1.04 | 0.88 | ||||
Sch_std | -5.49 | -0.90 | 3.68 |
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 | 2.651 | ||||||
Sch_etc | -0.270 | 3.211 | 6.951 | ||||
Sch_std | -1.388 | 3.295 | 7.978 | ||||
OTA input offset | offset | Spec | -10.00 | 0.00 | 10.00 | mV | |
Sch_typ | 0.76 | ||||||
Sch_etc | -1.47 | 1.04 | 3.61 | ||||
Sch_std | -3.11 | 1.45 | 6.01 | ||||
Bias current | ibp_1u_3 | Spec | 0.60 | 0.79 | 1.20 | uA | |
Sch_typ | 0.79 | ||||||
Sch_etc | 0.61 | 0.81 | 1.01 | ||||
Sch_std | 0.75 | 0.79 | 0.83 | ||||
Active current | i_active | Spec | 18.75 | 25.00 | 31.25 | uA | |
Sch_typ | 23.20 | ||||||
Sch_etc | 18.93 | 23.70 | 29.63 | ||||
Sch_std | 22.30 | 23.31 | 24.31 | ||||
Power down current | i_pwrdwn | Spec | 0.00 | 25.00 | 200.00 | nA | |
Sch_typ | 25.62 | ||||||
Sch_etc | 10.30 | 50.72 | 139.89 | ||||
Sch_std | 25.41 | 25.71 | 26.01 |
Temperature sweep (tsweep)
Temperature sweep to check vref accuracy variation with temperature
Name | Parameter | Description | Min | Typ | Max | Unit | |
---|---|---|---|---|---|---|---|
Current at 25C | ibp | Spec | 0.750 | 0.790 | 0.830 | uA | |
Sch_typ | 0.782 | ||||||
Sch_etc | 0.770 | 0.780 | 0.785 | ||||
Sch_std | 0.750 | 0.781 | 0.813 | ||||
Temp Coefficient | ibp_nA_c | Spec | 1.8 | 2.3 | 2.8 | nA/C | |
Sch_typ | 2.3 | ||||||
Sch_etc | 2.3 | 2.3 | 3.7 | ||||
Sch_std | 2.0 | 2.2 | 2.5 | ||||
Temp Coefficient | ibp_ppm_c | Spec | 2640.0 | 3000.0 | 3360.0 | ppm/C | |
Sch_typ | 2910.3 | ||||||
Sch_etc | 2891.6 | 2926.3 | 4752.4 | ||||
Sch_std | 2559.3 | 2871.3 | 3183.3 |