Inquiring minds want to know: a) What is the function of a DAC? Do not forget to mention the many kinds. Build a truth table for a 3 bit DAC. (B) You should be familiar with the following parts of a closed-loop control system. (1) Process Element (ii)Control Element (iii) Partially Constructed Feedback (iv) Correction Element for DC Amplifier of Turntable Speed Powered by Batteries Used with DC Motors Tachometer

The purposes of increasing derivative gain in a control system is....

1. Explain in your own words the control process of a dominant ON anddominant OFF.2. What is the difference between an indirect control from a direct controlprocess?

Figure 3 shows a Hartley oscillator. Assume that the op-amp employed in the figure is an ideal op-amp, and R1= 20 kΩ, R2 = 60 kΩ, L1=10 mH.  b) State the Barkhausen criterion for sustained oscillation.c) Explain briefly how the phase shift requirement for sustained oscillation ismet in the circuit of Figure 3.d) The feedback ratio and oscillation frequency of Figure 3 are givenrespectively by, B = -L2/L1 and w0 = 1 / sqrt(L1 +L2)C Determine the values of C and L2 in order for the circuit to oscillate at a frequency of 200 Hz.