A DSB-SC modulated signal is demodulated by applying it to a coherent detector. Evaluate the effect of a frequency error ∆f in the local carrier frequency of the detector, measured with respect to the carrier frequency of the incoming DSB- SC signal. b) For the case of a sinusoidal modulating wave, show that because of this frequency error, the demodulated signal exhibits beats at the error frequency. Illustrate you answer

(7 (6) Find the low frequency response by determining poles due to each coupling and hypass capacitor (CE, Cin & Cont). Ignore to for the BJT. 2/5 + Ps M Cin Vcr R₂ Vcc T R₂ Cont " ERL Vout

Tuned Circuit Design Using a VARICAP   (a)  Refer to the capacitance curves for the Motorola 1N4002 The input  tuning circuit of a standard analog  FM radio is given below.   Specify, that is design for, a voltage, capacitance, and inductance required  to tune the circuit to the center frequency of KUMD-FM which operates at 103.3 MHz.   Sketching and labeling a representative resonance curve is required to support your calculations.  There is no single correct design answer set of values since it depends upon the voltage you initially select to tune your diode.

Consider a step down converter supplied by a DC power source of magnitude Vs = 220 V. The switching period is 0.1 ms and the duty cycle k is set to 0.5. The load is an inductive load with R=5 Ohms and L=10 mH. The switch is ideal. The RMS converter current IR is equal to 15.56A. The ripple factor of the input current RFs would be equal to: Select one: a. 0% Ob. 50% Oc. 100% d. None of these