Path: utzoo!utgpu!news-server.csri.toronto.edu!rutgers!cs.utexas.edu!tut.cis.ohio-state.edu!ucbvax!bloom-beacon!eru!hagbard!sunic!news.funet.fi!kannel!mlukka From: mlukka@lut.fi (Markku Lukka) Newsgroups: sci.electronics Subject: Oscillators with extra-large frequency ranges Message-ID: Date: 29 Dec 90 17:14:04 GMT Sender: mlukka@lut.fi (Markku Lukka) Distribution: sci.electronics Organization: Lappeenranta University of Technology, Finland Lines: 22 Many thanks in advance for anyone who reads this article. As a hobbyist electronician I have come across a real problem. For a certain project, I would need an oscillator with digital, LOGARITHMIC adjusting (32-bit, 1000 x log) and a HUGE range, 1 kHz to 100 MHz. Is this at all possible? Then the next problem would be just to divide this signal into eight lines, so that the lines would pulse (change state, whichever would be the easiest) alternately, in order. I mean: Line 1,then line 2, then line 3, and at each input pulse from the oscillator the next line would be activated. This oscillator-divider pair would be used to control 8 memories, whose signals would be each in turn given to a D/A converter. BTW, is a VCO voltage/frequency ratio linear or what? Negative or positive? Please, if you read this message and know something about logarithmic frequency control, PLEASE! email to mlukka(at sign)kannel.lut.fi (at sign) doesn't seem to be available on this console. Sorry. mlukka(at sign again)kannel.lut.fi