Urgent question for exam!!!! Please help!
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Urgent question for exam!!!! Please help!

 
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jamezun



Joined: 31 Oct 2005
Posts: 11
Posted: Sun May 07, 2006 6:45 pm    Post subject: Urgent question for exam!!!! Please help! Reply with quote
I am going to have exam 11 hours later... so everyone please give me a hand? As more reply as possible!

1] What are the main features of power amplifier?

2] How to improve frequency response in BJT amplifier?

3] List each 6 advantages of Voltage-series and current-series negative feedback.

4]Comparison between an SCR and a TRIAC.

Thanks guys! Just try to answer those question you know!

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neon



Joined: 25 Feb 2006
Posts: 593
Posted: Tue May 09, 2006 3:01 pm    Post subject: Reply with quote
1] amplfy power
2]provide more hi freq f/b
3] don't understand ?
4] scr conducts only one way and block either + or - ac
5] triac is 2 scr back to back will conduct both + and - ac
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