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- Path: sparky!uunet!zephyr.ens.tek.com!gvgpsa!gold.gvg.tek.com!chrisc
- From: chrisc@gold.gvg.tek.com (Chris Christensen)
- Newsgroups: rec.audio
- Subject: Re: class D power amp
- Message-ID: <5029@gold.gvg.tek.com>
- Date: 12 Aug 92 16:13:50 GMT
- References: <1992Aug10.105528.26359@nntp.nta.no> <TILL.92Aug11102831@acid-rain.lucid.com> <1992Aug11.230042.394@ccu1.aukuni.ac.nz>
- Organization: Grass Valley Group, Grass Valley, CA
- Lines: 28
-
- In article <1992Aug11.230042.394@ccu1.aukuni.ac.nz> stuartw@ccu1.aukuni.ac.nz
- (Stuart Woolford) writes:
- >till@acid-rain.lucid.com (Don Tillman) writes:
-
- >>Other problems with Class D are that there is zero power supply noise
- >>rejection (before applying feedback) and that the output filter makes
- >>feedback more difficult to apply.
-
- >I intent to use a switchmode power supply, followed by linear regulation, and
- >MUCH filtering, probably switching at about 100KHz, would this seem like a
- >sensible setup.
-
- One of the things that people usually forget when filtering a
- power supply is the posiblity of common mode noise. I recommend that
- in addition to the bipolar filters that you intend to use that you
- also do a common mode filter.
-
- The Peavey Decca Series is a commercial incarnation of a class D power
- amplifier. The response spec of the amps indicate -3dB @ 20Khz.
-
- I think that class D power amps are fun to play with and they are
- unique but I put my money in the heavy antique design plane old linear
- power amp. Just my opinion, you didn't ask I offered :-)
-
- --
- Chris Christensen The opinions I express are my own,
- chrisc@gold.gvg.tek.com and sometimes they are wrong!
- 916-478-3419 FAX 916-478-3887 After all, I *AM* only human.
-