Unformatted text preview: Name: Student Number: Test 5 (Makeup), Class B Power Amplifier
Tuesday 27 April at 7:30—7:45pm. A class B power ampliﬁer operates from a supply voltage of 18V and delivers a
maximum unclipped output power of 25W. Given the following equations, 1 m ICP
ICC— ? I] CP sin(cot)da)t =—
PS 2 ICCVCC : [CPI/CC
_ R T/2 2 IépR'L PL : 7L— ﬂICP sin(a)t)] dwt = 4
0 At the maximum unclipped output power of 25W, determine the DC collector current,
supply power and efﬁciency. (Hint: to determine RC you will need to ﬁnd F: (max) in terms of VCZC ) 1/ ,1 _ at ”.i
Etna/1X); 4:2): ":2? 233W ’ 42, 1:.) ,QL- Ell/J2.
_ t/C 13
Ia? " C4, : 37% 55‘ em ...
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- Spring '10