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# cedesign - Design a common-emitter ampliﬁer that will...

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Unformatted text preview: Design a common-emitter ampliﬁer that will achieve a voltage gain IAVJ =|V.N,-J of more than 100 and an input impedance Zi of more than 15m when the particular ZNSDSB transistor described in the table below is used at middle frequencies. The ﬁrst entry in the table is hk-aﬂo and the second entry is 1135:, for various values of Va; and 1c. You may assume Vo=0.65 V. 1133:“), 84550, ICEO=0, and tar-on. The supply voltage Vcc is 10 volts and the load RL is 61m. Assume C1. C2, and C5 are "large". 696.19.2K . mm m mm 980. 13K (2:) Choose an operating point (lovcg) by selecting VCE to be 2, 4. 6. 8, or 10 volts, and selecting [c to be 1. 2, 3, 4. orS mA. Iv“ :3 3+9 5' James VCE ‘6 VC: - :3 V‘& S B ‘FDf LICS ) Ic=lnﬂ ﬂags-2V (Rukéf‘l'huwb Is Sahsfteﬂ, V8e=ch:2. r Z+2+£=l0 (b) Pick a value for RC. (c) Pick values for R1. R2. and RE. The current at the Operating point should vary by no more than 10 per cent for BSOSBRSIOOO. (You will receive partial credit if you achieve the Operating point that you speciﬁed in part (a) even in your design fails to achieve the other design goals.) “I3 = m9 ﬂak Igl :- [#113 (Sa'hsﬁec Role 0‘? name 401‘ S'tlbt‘l )4 ‘013 5312,15 (901.8] {pd I; on [OI-c) Thai. ls} Tuck IRF‘DZMH . current GlJe I'50 lwfud' impeo‘amce i5 “Ottawa,ng “Helge Moss K: V12; lO—Vg£~.£S‘-"7,35' 33: Veilgzllfrr I: g: z z 367k51 L IR; 2 Ig'éfs 3 ‘OZ " it: 10m“: “A ALE?- : £255 .3 Hgkﬁ‘ Via = Va“ is: 2 LS g” 1’92 W5" k ‘F 6 5+4“ \$14.1: @Baczg 5013;: 330(230‘kbi) R2 = #3. €th or Id? 5 0‘31 [olqifamz :‘thn Varies by [955 ﬁg” [0% whiff M Bork! I5: EWTH 'ngfoul] ’ u“: 22 c N256? ‘0: 2391’ C5) , u 4. ﬁg «23% “3 s to 23W“. 3 = Mg m + m 0 8Th: ﬁllﬁﬁ 10231:». @B’I‘WQI‘ ﬁrmer»: “all?! RE Lkﬂ‘ (d) How would you change the operating point Speciﬁed in (a) if you wanted a higher voltage gain IAVJ , but could tolerate a lower input impedance 2i? Check ‘gor - 1?;=ﬁ.ﬂ(lzz|(rn:3m[{iqa[fliz HT 0?. ‘PT- +9 Mid” ImPeJdnce : [owlqu 2&an IT;¢;\$¢:5(_ 'RFWEE 3m ’H'ND ...
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cedesign - Design a common-emitter ampliﬁer that will...

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