. 810. A PID controller has a derivative gain of 48. What is the integral gain and proportional gain if the zeros are placed at s=-21 and s=-29? Where is the pole? ans:3

A thermocouple with a sensitivity of 0.0225 mV/F is used to measure temperature. The signal from the thermocouple is passed through a non-inverting amplifier as below. Where the resistors R₁ = 9.99k and R₁ =1092. The amplified signal is then passed through an 8 bit A/D converter. If the the full scale voltage is 10V. a. What is the temperature resolution? b. What is the range of temperature can be measured from zero? c. If measuring a temperature of 200° F, what is the voltage indicated by the A/D converter? What is the reading of temperature from the DAQ system? V₁ Op-amp m R

An operational-amplifier circuit that may be used as a controller is shown in Figure Qla. (a) R4 ww R1 R3 e Co Figure Qla R1, R2, R3 and R4 are resistors and C1 and C2 are capacitors. Assume both op-amps are ideal and their input/output voltages are ei, e and eo, as shown in the Figure. Using the impedance approach: (i) obtain the transfer function for each op-amp, i.e. E(s)/E:(s) and Eo(s)/E(s). (ii) hence obtain the complete transfer function for the system, i.e. Eo(s)/Ei(s). (iii) Determine D(s) = Eo(s)/E:(s) when R1 = R2 = R3 = R4 = 1 N and C1=1 F, C2= 2 F. %3D (b) Consider the closed-loop control system shown in Figure Qlb. 1 Σ K.D(s) (s +2) Figure Qlb K is the gain and D(s) is the transfer function obtained in part (a)-iii. (i) Plot open loop zeros and poles for the above system in the s-plane. [. Determine whether the point (-1+j) is a closed loop pole for any value of K, by considering the angle criterion at this point. (ii) (c) Briefly summarise the steps, which need to be…

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Draw a circuit diagram of a Class-C power amplifier. Explain the reason why a Class-C power amplifier is in general more efficient than a Class-B power amplifier. What is the main disadvantage of Class-C power amplifiers?