Figure 5 shows a current series feedback amplifier. The sampled current signal is the output current, I, flowing in resistor, Rg, where it develops a feedback signal voltage V; across the resistor, Rg. Determine: a) the feedback gain, B %3D Io b) the gain without feedback, A Vs = A c) the gain with feedback, Af 1+BA

Assume that the R2/R1 ratio of a feedback amplifier with voltage supply of +/- 10 V  is 3.0 and that a value of 1.0 V is applied to the non inverting input of the op-amp. What is the output voltage value?

A certain op-amp is used in a feedback configuration having a gain of 20 and a bandwidth of 500 kHz. a)If the external resistor values are changed to increase the gain to 40, what is the new bandwidth? The new bandwidth is 250khz What is the unity-gain bandwidth of the op-amp ??

Figure 6 (a) shows the circuit diagram for a differential amphfier. You may assume that M and M, have identical parameters. Referring to Figure 6 (a): (a) What kind of amplifier is it? What is its role in a three-stage op amp? Draw the small signal equivalent eircuit and derive the differential voltage gain Aag. For the analysis consider RDI RD2 >>Rp State any assumption. (b) RD. gml gm gm, and r re=r What is the new Adr in the circuit of Figure 6 (b), where a PMOS current source has replaced the two drain resistors Ror R Rp and a NMOS current sink has replaced the source resistor Rs? (c) What are the advantages in using the circuit of Figure 6 (b) instead of Figure 6 (a) to realize an op amp? (d) Ven Ms Mg Rp1 Rpa Vo HM, My M Ma M3 Vss 0 V Vss 0 V Figure 6(b) Figure 6 (a)

please do question 2 and 3