In the op amp model above, open-loop gain A = 107 and VCC = 12 V. Suppose the inverting-input voltage is vn = 29 μV and the output voltage vO = 4 V. What is the noninverting input voltage vp (in micro-volts)?
Image text
In the op amp model above, open-loop gain and .
Suppose the inverting-input voltage is and the output voltage .
What is the noninverting input voltage (in micro-volts)?
![Assume that ID5 = 100 μA, all transistors lengths are 1.2 μm, and CC = 10 pF. For the two-stage op amp shown above, (a) Estimate the -3 dB frequency of the first stage. (10%) (b) Estimate the unit-gain frequency of the opamp. (5%) (c) Find the slew rate. (5%) (d) What circuit changes could be made to double the slew rate but keep unity-gain frequency and CC unchanged? (Assume all channel lengths are fixed) (5%) (e) Follow (d), how should M6 change to maintain zero systematic offset voltage? (54%) (f) Follow (d) and (e), ignoring the body effect, what is the output voltage range of the opamp? What is the range of common-mode input voltage, assuming ±2.5 V power supplies are used? (10%) [Two-Stage CMOS Op Amp + Output Stage] *n-channel MOS transistors: μnCox = 92 μA/V2; Vtn = 0.8 V; ro = 8,000L (μm)/ID(mA) in saturation region * p-channel MOS transistors: μpCox = 30 μA/V2; Vtp = -0.9 V; ro = 12,000L (μm)/ID(mA) in saturation region](https://www.doubtrix.com/js/ckeditor/filemanager/connectors/php/editor/1702192763-Jzmnfiefggzdfvkaf.png)
