Chapter 10 : Phase Locked Loops

1	In Digital PLL the loop filter is analog in nature. Is that true?
	A)	Yes
	B)	No
2	Can PLL be called a feedback control system?
	A)	Yes
	B)	No
3	Does suppression of spikes improve FM demodulation when PLL is used?
	A)	Yes
	B)	No
4	The steady-state error for both phase and frequency for a step change in frequency at second order PLL input is zero. Is the statement correct?
	A)	Yes
	B)	No
5	Can duty cycle of input signal be less than 50 percent in edge-triggered Flip-Flop based digital phase detectors?
	A)	Yes
	B)	No
6	Is the control voltage output zero for phase-frequency detector when lock-in is established?
	A)	Yes
	B)	No
7	Can PLL be used for both Frequency Modulation and Demodulation?
	A)	Yes
	B)	No
8	Can PLL based frequency synthesis be useful in generating multiple clock frequencies from a single source, e.g. in computer mother board?
	A)	Yes
	B)	No