Here’s a two-stage op-amp I designed for an undergraduate class. Fun times.
| Spec | Vcm = -0.1V | Vcm = 0V | Vcm = 0.1V | |
| Open Loop DC Gain | > 5000 V/V | 5130 V/V | 5074 V/V | 4996 V/V |
| Unity Loop Gain Freq. | > 10 MHz | 10.89MHz | 11.0MHz | 11.07MHz |
| Loop Gain Phase Margin | > 60° | 60.48° | 60.25° | 60.09° |
| Input Offset Voltage | < 3 mV | 11.91uV | -3.943uV | -15.89uV |
| Slew Rate Positive | > 10 V/us | 56.24 V/us | 59.34 V/us | 56.11 V/us |
| Slew Rate Negative | < -10 V/us | -10.2 V/us | -10.18 V/us | -10.17 V/us |
| Output Swing Low | -300mV | -598mV | -586mV | -545mV |
| Output Swing High | 300mV | 497mV | 557mV | 554mV |
| Current | 96.26 uA |
| Power | 115.5 uW |
| Area | 46.68 um^2 |
| Compensation Cap | 0.13 pF |
| Figure of Merit | 1.427 |
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Is that cadence design??
Doe this really work? can you share the layout design?