8.21 Differential amplifiers are often used inconjunction with the Wheatstone bridge. Consider thebridge shown in Figure P8.21, where each resistor is atemperature-sensing element and the change inresistance is directly proportional to a change intemperature that is, AR = a (+AT), where the signis determined by the positive or negative temperaturecoefficient of the resistive element.a. Find the Thévenin equivalent that the amplifier seesat point a and point b. Assume that |AR? « R.b. If JAR| = KAT, with K a numerical constant, findan expression for vout (AT), that is vaut as afunction of change in temperature.100 kaR- JARRot JAR|ww10 VR+|A|Vout100 kaR =1 ka

(a) Short-circuit the input voltage and draw the circuit diagram to find the Thevenin resistance…

Answered: 8.21 Differential amplifiers are often…

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...

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Similar questions

Ql:A: Design a multi-range ammeter of 0.5 and I Amp. using a PMMC(galvanometer) of 500 internal resistance and full-scale current of 1 ma. Show the way of connection with the load RL.
Q.) A Wheatstone bridge strain gage, shown in figure 1, with a gage factor (F) of two is used to monitor axial strain in an old train rail. The maximum axial strain is expected to be 200 x 10-S. The output voltage of the bridge is connected to an instrumentation amplifier before interfacing it with 12 V analog to digital converter. Design a suitable instrumentation amplifier circuit which allows utilization of the full span of the ADC. Vsupoly 350 2 1 KN Vo 5V Instrum Vout Dout 350 N VB ADC 1 KN op Amp Figure I Gage
Subject : Electronics Engineering Draw circuits for both inverting and non-inverting amplifier using op-amp. Derive the expression for the gain of an inverting amplifier
Figure QI shows the circuit diagram of a "Logarithmic Amplifier". In this circuit the feedback resistor of a normal inverting amplifier is replaced by a silicon diode. Since the current flowing through the diode increases exponentially with the voltage across the diode, the voltage across the diode will be proportional to the logarithm current flowing through it. Hence the output of the circuit is proportional to the logarithm of the input voltage. QI DI RIN Al Figure QI The current flowing through a diode is given by the Shock' y Diode Equat n: 1,=1, (e" =1) where , is the current flowing through the diode g is the charge on the electron (given at the back of the examination sheet) V, is the voltage across the diode K, is Boltzmann's constant (given at the back of the examination sheet) Tis room temperature (given at the back of the examination sheet) Given that /,> 1, an approximate expression for V, as a function of I, is Continued overleaf Page 2 of 9 QI (a) 0) Neglecting any input…
Q.4) a- The LM317 is used as a voltage regulator: i- Draw the standard external connection to get this function. ii- drive an expression for output voltage as a function of the external resistances used in (i). iii- select the values of resistors to be used in circuit(i) that is required to produce an output for the external voltage of 12V with an input of 18V. the maximum regulator current with no load is to be 2mA. There is no external pass transistor, assume I adjusted is 50µA.
Do b)?
8.23 Find an expression for the gain of the circuit of Figure P8.23. 1/6 F ww O Vout 1/6 F,
Perform an ac analysis. Represent the amplifier by its ac equivalent circuit and discuss the input resistance at the base and the output resistance. (You can draw the circuit by hand on paper and can paste the image)
Four voltage sources of 3 V, 4V, 2V and 3V respectively are to be applied to the input terminal/terminals of “an" inverting amplifier. Design two different circuits for the two different cases with justified explanation and selection of proper resistances as per the requirements below: a) When an output of 4V is required (with phase shift). b) When an output of 8V is required (without phase shift) Note: Only inverting amplifier/amplifiers to be used for each case and all the voltage sources are to be used for each individual design as required in a) and b). 2.
An op-amp has the open-loop frequency responseshown in Figure 8.37 in the text. What is theapproximate bandwidth of a circuit that uses theop-amp with a closed-loop gain of 75? What is thebandwidth if the gain is 350?
An operational amplifier consisting of three cascaded stages has a voltage gain of 3500. The gain of the first two stages is known to be -5 and -900. What is the voltage gain of the last stage and which type of MOSFET amplifier would you prefer for this stage?
8.28 Design an inverting summing amplifier to obtain the following weighted sum of four different signal sources: Vout = -(2 sin wit + 4 sin wzt+ 8 sin wzt+ 16 sin wt) Assume that Rp = 5 k2, and determine the required source resistors.

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