Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN: 9780133923605
Author: Robert L. Boylestad
Publisher: PEARSON
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- The ideal op-amps depicted can swing rail-to-rail at output, and Vcc= 13 V. Initially, the output voltage Vo = +13 V and the input voltage is vS = -13 V. The feedback resistors are R1 = 6.4 k0, R2 = 8.5 kQ, and R3 = 1.6 KQ. If the input voltage is gradually increased, at what value of vS (to 1% accuracy) does the output voltage (Vo) change to Vo=-Vcc? VVV vS = + R10 Vcc -Vcc R20 04 O Voarrow_forwardFigure 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)arrow_forward+Vcc Vin VI Vo Vref VN -Vcc Ry RxL Figure Q.A2(e). Inverting Schmitt-trigger circuit. (ii) The operational-amplifier (op-amp) of the inverting Schmitt-trigger in Figure Q.A2(e) has saturation voltages of +Vsat = +11 V and -Vsat = -11 V. The voltage divider circuit has the relationship of Rx = 2RY with the value of RY being 100 kn. Using the relationships derived above: (a) Calculate the values of the upper threshold point (UTP or Vi*), lower threshold point (LTP or Vr). (b) Now, sketch the input-output characteristic of the inverting Schmitt- trigger. Clearly label axes, the threshold voltages and the saturation voltages in your sketch.arrow_forward
- Operational Amplifier (Op-Amp) is a solid-state device with voltage amplification capabilities as shown in Figure Q1. (a) Name the function of Op-Amp U1, U2 and U3 in Figure Q1. (b) Derive the output voltage (Vol, Voz and Vo3) of each Op-Amp in Figure Q1. Based on derivation in Q1(b), calculate the output voltages (Vol, Vo2 and Vo3) of the circuit. All the Op-Amps are powered with + 12V voltage supplies. Given: Ra = Rb = 1 kN, Ry = Rx = 10 kN, Ra = 3.6 kN, Rr = 3 k2. The input voltages: V,= V = 5 V. (c) (d) Draw and label clearly the sinusoidal output of Vo1, Vo2 and Vo3.arrow_forwardQ1 (a) (b) Considering an op-amp, define what is meant by input offset voltage (Vos) and explain what causes it. Figure Qla shows an integrating amplifier with zero input. Derive an expression for the output voltage, Vo, and explain the effect that Vos will have on its operation. R W Vos C Figure Qla A •V₂arrow_forward
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