Luis wrote: > > I'm looking for the schemes used on the frequency synthesizers > that change frequency in few microseconds time (or less) <snip> > > Does anyone know of some paper or tech notes from > some instrument or modules that show block diagrams > of such? > I've never done much with fast PLL's, but here's some references for direct analog and direct digital synthesizers: ----------- One of the "classic" synthesizer books that covers direct synthesis techniques is available in a reasonably priced paperback reprint ( but the photos aren't as nice as I recall from the original hardcover ): Frequency Synthesizers: Theory and Design, Third Edition Vadim Manassewitsch Wiley-Interscience _http://www.amazon.com/Frequency-Synthesizers-Theory-Vadim-Manassewitsch/dp/ 0471772631/_ (http://www.amazon.com/Frequency-Synthesizers-Theory-Vadim-Manassewitsch/dp/0471772631/) ----------- My favorite DDS book reprints many of the classic DDS papers: Direct Digital Frequency Synthesizers V. Kroupa (ed) IEEE Press _http://www.amazon.com/Direct-Digital-Frequency-Synthesizers-Venceslav/dp/07 80334388_ (http://www.amazon.com/Direct-Digital-Frequency-Synthesizers-Venceslav/dp/0780334388) ----------- Another good reprint to have on hand, but not specific to your fast-switching question, is the following: Phase Noise in Signal Sources (Theory and Application) W. P. Robins Peter Peregrinus Ltd / IEE _http://www.amazon.com/Phase-Signal-Sources-Theory-Application/dp/086341026X /_ (http://www.amazon.com/Phase-Signal-Sources-Theory-Application/dp/086341026X/) ----------- This web page about the HP 51xx family includes some HP direct synthesis app notes and articles: _http://www.hpmemory.org/news/5100/hp5100_page_00.htm_ (http://www.hpmemory.org/news/5100/hp5100_page_00.htm) _http://www.hpmemory.org/an/pdf/an_96.pdf_ (http://www.hpmemory.org/an/pdf/an_96.pdf) ----------- Rick Karlquist's UFFC papers are a great read on direct synthesizer topology, albeit geared towards a specific application: _http://www.karlquist.com/FCS95.pdf_ (http://www.karlquist.com/FCS95.pdf) _http://www.karlquist.com/FCS96.pdf_ (http://www.karlquist.com/FCS96.pdf) ----------- For IEEE/UFFC members, the UFFC archive is a good resource for synthesizer design info: _http://www.ieee-uffc.org/main/publications/fcs/index.asp_ (http://www.ieee-uffc.org/main/publications/fcs/index.asp) ----------- The basic Comstron frequency plan is summarized in their 1988 patent: _http://www.google.com/patents?id=bgA7AAAAEBAJ&dq=4725786_ (http://www.google.com/patents?id=bgA7AAAAEBAJ&dq=4725786) The Comstrons make great lab synthesizers, and are often available cheap on e$ay but I'd advise keeping a spares unit on hand for troubleshooting and repair. ----------- have fun, Brian

Hi: The HP 5100 provides extremely fast frequency transitions. It was used to generate a 2 to 30 MHz sweep that was close to phase coherent. See: http://www.prc68.com/I/HP5100.shtml No PLLs used, just arithmetic. Have Fun, Brooke Clarke http://www.prc68.com BriMDavis@aol.com wrote: > Luis wrote: >> I'm looking for the schemes used on the frequency synthesizers >> that change frequency in few microseconds time (or less) > <snip> >> Does anyone know of some paper or tech notes from >> some instrument or modules that show block diagrams >> of such? >> > > I've never done much with fast PLL's, but here's some references > for direct analog and direct digital synthesizers: > > ----------- > > One of the "classic" synthesizer books that covers direct > synthesis techniques is available in a reasonably priced > paperback reprint ( but the photos aren't as nice as I > recall from the original hardcover ): > > Frequency Synthesizers: Theory and Design, Third Edition > Vadim Manassewitsch > Wiley-Interscience > _http://www.amazon.com/Frequency-Synthesizers-Theory-Vadim-Manassewitsch/dp/ > 0471772631/_ > (http://www.amazon.com/Frequency-Synthesizers-Theory-Vadim-Manassewitsch/dp/0471772631/) > > ----------- > > My favorite DDS book reprints many of the classic DDS papers: > > Direct Digital Frequency Synthesizers > V. Kroupa (ed) > IEEE Press > _http://www.amazon.com/Direct-Digital-Frequency-Synthesizers-Venceslav/dp/07 > 80334388_ > (http://www.amazon.com/Direct-Digital-Frequency-Synthesizers-Venceslav/dp/0780334388) > > ----------- > > Another good reprint to have on hand, but not specific to > your fast-switching question, is the following: > > Phase Noise in Signal Sources (Theory and Application) > W. P. Robins > Peter Peregrinus Ltd / IEE > _http://www.amazon.com/Phase-Signal-Sources-Theory-Application/dp/086341026X > /_ > (http://www.amazon.com/Phase-Signal-Sources-Theory-Application/dp/086341026X/) > > ----------- > > This web page about the HP 51xx family includes some HP direct synthesis > app notes and articles: > > _http://www.hpmemory.org/news/5100/hp5100_page_00.htm_ > (http://www.hpmemory.org/news/5100/hp5100_page_00.htm) > _http://www.hpmemory.org/an/pdf/an_96.pdf_ > (http://www.hpmemory.org/an/pdf/an_96.pdf) > > ----------- > > Rick Karlquist's UFFC papers are a great read on direct synthesizer > topology, albeit geared towards a specific application: > > _http://www.karlquist.com/FCS95.pdf_ (http://www.karlquist.com/FCS95.pdf) > _http://www.karlquist.com/FCS96.pdf_ (http://www.karlquist.com/FCS96.pdf) > > ----------- > > For IEEE/UFFC members, the UFFC archive is a good resource for > synthesizer design info: > > _http://www.ieee-uffc.org/main/publications/fcs/index.asp_ > (http://www.ieee-uffc.org/main/publications/fcs/index.asp) > > ----------- > > The basic Comstron frequency plan is summarized in their 1988 patent: > > _http://www.google.com/patents?id=bgA7AAAAEBAJ&dq=4725786_ > (http://www.google.com/patents?id=bgA7AAAAEBAJ&dq=4725786) > > The Comstrons make great lab synthesizers, and are often available > cheap on e$ay but I'd advise keeping a spares unit on hand for > troubleshooting and repair. > > ----------- > > > have fun, > Brian > > > > > > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. >

Brian, Wow, a lot of nice reading I have here. Thanks. Luis Cupido. ct1dmk. BriMDavis@aol.com wrote: > Luis wrote: >> I'm looking for the schemes used on the frequency synthesizers >> that change frequency in few microseconds time (or less) > <snip> >> Does anyone know of some paper or tech notes from >> some instrument or modules that show block diagrams >> of such? >> > > I've never done much with fast PLL's, but here's some references > for direct analog and direct digital synthesizers: > > ----------- > > One of the "classic" synthesizer books that covers direct > synthesis techniques is available in a reasonably priced > paperback reprint ( but the photos aren't as nice as I > recall from the original hardcover ): > > Frequency Synthesizers: Theory and Design, Third Edition > Vadim Manassewitsch > Wiley-Interscience > _http://www.amazon.com/Frequency-Synthesizers-Theory-Vadim-Manassewitsch/dp/ > 0471772631/_ > (http://www.amazon.com/Frequency-Synthesizers-Theory-Vadim-Manassewitsch/dp/0471772631/) > > ----------- > > My favorite DDS book reprints many of the classic DDS papers: > > Direct Digital Frequency Synthesizers > V. Kroupa (ed) > IEEE Press > _http://www.amazon.com/Direct-Digital-Frequency-Synthesizers-Venceslav/dp/07 > 80334388_ > (http://www.amazon.com/Direct-Digital-Frequency-Synthesizers-Venceslav/dp/0780334388) > > ----------- > > Another good reprint to have on hand, but not specific to > your fast-switching question, is the following: > > Phase Noise in Signal Sources (Theory and Application) > W. P. Robins > Peter Peregrinus Ltd / IEE > _http://www.amazon.com/Phase-Signal-Sources-Theory-Application/dp/086341026X > /_ > (http://www.amazon.com/Phase-Signal-Sources-Theory-Application/dp/086341026X/) > > ----------- > > This web page about the HP 51xx family includes some HP direct synthesis > app notes and articles: > > _http://www.hpmemory.org/news/5100/hp5100_page_00.htm_ > (http://www.hpmemory.org/news/5100/hp5100_page_00.htm) > _http://www.hpmemory.org/an/pdf/an_96.pdf_ > (http://www.hpmemory.org/an/pdf/an_96.pdf) > > ----------- > > Rick Karlquist's UFFC papers are a great read on direct synthesizer > topology, albeit geared towards a specific application: > > _http://www.karlquist.com/FCS95.pdf_ (http://www.karlquist.com/FCS95.pdf) > _http://www.karlquist.com/FCS96.pdf_ (http://www.karlquist.com/FCS96.pdf) > > ----------- > > For IEEE/UFFC members, the UFFC archive is a good resource for > synthesizer design info: > > _http://www.ieee-uffc.org/main/publications/fcs/index.asp_ > (http://www.ieee-uffc.org/main/publications/fcs/index.asp) > > ----------- > > The basic Comstron frequency plan is summarized in their 1988 patent: > > _http://www.google.com/patents?id=bgA7AAAAEBAJ&dq=4725786_ > (http://www.google.com/patents?id=bgA7AAAAEBAJ&dq=4725786) > > The Comstrons make great lab synthesizers, and are often available > cheap on e$ay but I'd advise keeping a spares unit on hand for > troubleshooting and repair. > > ----------- > > > have fun, > Brian > > > > > > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. >