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- From: rkarlqu@hpscit.sc.hp.com (Rick Karlquist)
- Date: Wed, 26 Aug 1992 19:21:23 GMT
- Subject: Re: contacting N.O. Sokal, Design Automation Inc.
- Message-ID: <55550026@hpscit.sc.hp.com>
- Organization: Hewlett-Packard, Santa Clara, CA
- Path: sparky!uunet!elroy.jpl.nasa.gov!sdd.hp.com!hpscdc!hplextra!hpcc05!hpscit!rkarlqu
- Newsgroups: sci.electronics
- References: <1992Aug26.104102.513@csc.canterbury.ac.nz>
- Lines: 37
-
- In sci.electronics, mathiega@elec.canterbury.ac.nz (Grant A. Mathieson) writes:
-
- > Since reading a paper...
-
- > "Class-E Resonant Regulated DC/DC Power Converters:
- > Analysis of Operation, and Experimental Results at 1.5 MHz"
- > Redl, R., Molnar, B., and Sokal, N.O., IEEE Power Electronics
- > Specialists Conference 1983
-
- > ...I have developed an interest in Class-E techniques for
- > Power Conversion, which mimic those used in Class-E RF
- > Power Amplifiers.
-
- This is something I have wondered about for a long time, since
- first reading about "Class E" some 20 years ago. It seems to
- be a solution looking for a problem to solve. Now that Mr.
- Sokol's patent on it is about to expire, I imagine he has
- gone on to other things. As near as I can tell, "Class E" is
- basically just a resonant switching technique, of which there
- must be a half dozen basic types in use today. The difference
- is that Class E runs at a constant frequency, whereas the
- resonant techniques now popular with power supply vendors such
- as Vicor use variable frequencies. The variable frequency allows
- the supply to do line and load regulation. Most of the class
- E circuits I have seen are unregulated. I don't know what
- Sokol does in the above paper to get regulation.
-
- Kind of reminds me of Mr. Cuk and his "Cuk converter" whose
- patent will also expire soon.
-
- Then there is "integrated magnetics".
-
- What they all have in common is a lot more papers written about
- them than actual designs utilizing them.
-
- Rick Karlquist
- rkarlqu@scd.hp.com
-