Solnf00

# Solnf00 - Homework ECpE 4605 Fall 2000 Contents I Problem...

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Homework ECpE 4605 Fall 2000

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3 Contents I. Problem statements II. Answers
5 Problem Statements Set 1 1. (1.3-1) 2. (2.1-1) 3. (2.2-2) Set 2 4. Given: a load of 1000 in parallel with a capacitor . This parallel combination is then H G connected to the input through a series inductor . Determine and to prvide an input impedance of PP G &!Þ! "!Þ! H at MHz. Set 3 5. Given: a load of 2500 in parallel with a capacitor . This parallel combination is then H G # connected to the input through a series combination of an inductor and capacitor . Determine , PG P " G G &!Þ! "Þ!! ‚ "! "# ) , and to provide an input impedance of at r/s. Design for a bandwidth of H 1.00 10 r/s with a source resistor. &!Þ! ( H Set 4 6. The output of a BJT collector is to be modeled as an ideal current source in parallel with 2.00pF of capacitance. The circuit has a 2000 resistor in parallel with an inductor, , connected to a 12V H P supply (the supply has an AC shorting capacitor across it). To complete the circuit, there is a capacitor GG ( & from the collector to ground and a capacitor from the collector to the load of . For H = 9 ) œ "Þ!! ‚ U œ "!Þ! Pß G ß G 10 r/s and , determine the values needed for and to transform the (& "!!! HH to in parallel at the collector. Set 5 7. A tapped capacitor circuit is to be used to transform a 50 load to at 10 r/s = &!! œ "Þ!! ‚ 9 ) and . The source resistor is 1000 . The capacitor, , in parallel with the load is connected U œ "!Þ! G H # to the input by a series capacitor, . The combination is resonated at the input by a parallel inductor, G \$ P &!! , to obtain the input resistance (no reactance) at resonance. H Set 6 8. A source and load of 1250 are to be matched with a C-L-C pi network. The source has a built H in parallel 2pF and the load has a parallel 10pF. The capacitances added across the input is to be

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6 1. THE TITLE OF A CHAPTER designated and that in parallel with the load is to be designated . These parallel connections are GG " # w w attached with a series inductor, . Determine the values of , , and for a center frequecy of PG G P "# ww 50MHz and a bandwidth of 1MHz. (The resultant is large, but determine the values anyway) U Set 7 9. A source of 50 is to be matched to a load of 25 using a C-L-C Tee network. The HH transformed impedance should provide a conjugate match to the source at a radian frequency of 100.0 Mr/s and the circuit shall provide a Q=10. Determine the valuse of C1, C2, and L. Set 8 10. (2.2-1) Set 9 11. (2.11-1) Set 10 12. Given a series inductor of connecting ports 1 and 2, with a parallel capacitor across port 4"&! H 2 of , determine (a) the S-parameters if and (b) the S-parameters if  4"''Þ( ^ œ &! ^ œ &! H !! " and . ^ œ &!! !# H Set 11 13. A circuit may be modeled by a hybrid model consisting of a resistor of across port 1. The #& H current into this resistor from the + terminal of port 1 is . At port 2, we have a dependent current 3 source , with , feeding the positive terminal and also a 2pF capacitor and a 2000 resistor in H 3 œ !Þ** parallel with the source. Determine the S-parameters for .
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Solnf00 - Homework ECpE 4605 Fall 2000 Contents I Problem...

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