Question

Problem 2. For the circuit of Figure P-2, a) Write a nodal equation for the node vn 4692 3452 b) Find the voltages v, and vo and the current io. Figure P-2

Answer 1

Given circuit :- K2 NP I guess bike Assume currents as shown in figure. no current will enter in opamp from input side. So ITO A. (a) Nodal equation for node in apply RC2 at Un in total outgoing current zo " t Ij) + 2-IMA) + I o. ;' Nn-4. Valo ³ 2140-4) + (Van Vo) -820 [3\n-Vo = 16 l . - (6) Now apply KVL in loop h -uip - Csip +6=0 → sp - Holtage Up= o- ulip) = - uxo a a3v - MA

Vp = -3V as no current entering in -☺ op Amp So Vn = Up So [un: -3v1 © by.KOL: I Won 4-423. ma I, =1.75 mA -☺ apply RlL at node in Ina Is-IMA. 1675 . I -1 I 1+1.75 : 2.75 mA B4 KUL: VG-BI2 = No -3-8/2.15) = Vo (Vo = -25 v1 Apply RCL at point o, i . all incoming current co ³. Is táo -1 mA = A los 1- I2 = 1-2.75 -2015 mA 10/F YOXEAL . .= -1.75 mA Un = - 2V1 [Vo = -25 v1 Hos -1.75 mp |
For the given circuit the results are found to be :

v_n = -3V,

v_o = -25V,

i_o = -1.75mA