hw1_sol

hw1_sol - 1 1 2 1 , 2 1 1 1 | 2 1 RC C I R I Z CP CP I I C...

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ECE264D HW1 SOLUTION: Q1. ANSWER: Jammer power to signal (100KHz signal BW): Linear Scale: IF Signal from Power IF Jammer from Power JSR @ _ _ @ _ _ Log Scale: ) _( ) log( 10 ) ( @ ) / ( _ @ Hz BW dB RF JSR Hz dBc Noise Phase IF JSR IF JSR @ =-120 Hz dBc / +65 dB +10log(100KHz) ) ( dB JSR =-5 dB Q2:ANSWER: Jammer power to signal (100KHz signal BW): Linear Scale: IF Signal from Power IF Jammer from Power JSR @ _ _ @ _ _ Log Scale: ) _( ) log( 10 ) ( @ ) / ( _ @ Hz BW dB RF JSR Hz dBc Noise Phase IF JSR ) _( ) log( 10 ) ( @ ) ( @ ) / ( _ Hz BW dB RF JSR dB IF JSR Hz dBc Noise Phase Hz KHz dB dB Hz dBc Noise Phase ) 100 log( 10 65 10 ) / ( _ Hz dBc Hz dBc Noise Phase / 125 ) / ( _ Q3:ANSWER: Jammer power to signal (100KHz signal BW): Linear Scale: IF Signal from Power IF Spur from Power IF PhaseNoise from Power IF JSR total @ _ _ @ _ _ @ _ _ @ dB IF JSR PhaseNoise 5 @ dB dBc Spur dB RF JSR IF JSR Spur 5 70 65 ) ( ) ( @ @ dB dB dB IF JSR total 2 3 5 @ (log scale)
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Q1 ANSWER: Open Loop Gain ( Loop Gain)= A s K sRC R I sC I K A VCO CP CP PFD ) 1 2 1 2 ( 2 2 1 1 N 1
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From the equation, Poles: 1. 2 poles 1 P at DC, 2. 1 pole at 2 P 2 1 RC Zero: 2 1 1 2 1 2 1 2 1 1 2 1 1 1 1 C I C I R I C I I C C RC CP CP CP CP CP Z Q2 ANSWER:
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Unformatted text preview: 1 1 2 1 , 2 1 1 1 | 2 1 RC C I R I Z CP CP I I C C Z CP CP 2 2 1 2 1 1 1 RC RC C C p z We have the Bode Plot as right Q3 ANSWER: 2 1 1 2 2 1 1 2 1 1 1 1 C C I I R C I C I R I CP CP CP CP CP Z We could let 1 2 CP CP I I 10x larger than 1 ( when 1 CP I = 2 CP I , 1 2 CP CP I I =1), that is, 1 2 CP CP I I = 10 ) ) 1 ( 1 ( 1 2 2 2 1 1 2 1 2 1 1 RC s s C I C I R I s s C C R N I K K A CP CP CP CP PFD VCO If we want to ignore 2 C and without changing PLL loop transfer function/bandwidth, 10 1 ' 1 C C hence, 10 1 ' 1 CP CP I I could make sure the A is constant...
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hw1_sol - 1 1 2 1 , 2 1 1 1 | 2 1 RC C I R I Z CP CP I I C...

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