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1. LF: RE: Re: VDC source with microvolt resolution (score: 1): Author: "James Moritz" <[email protected]>; Date: Thu, 13 May 2004 12:30:42 +0100; .....This is more or less what I had in mind when I wrote of a charge pump. The AVR micro I am using offers a PWM output, but unfortunately it has a resolution of only ten bits, so it must be done in; /rsgb_lf_group-archives/html/rsgb_lf_group/2004-05/msg00042.html (9,475 bytes)
2. LF: Re: Re: VDC source with microvolt resolution (score: 1): Author: "Stewart Nelson" <[email protected]>; Date: Thu, 13 May 2004 17:18:01 +0200; Hi Alberto, The filtering requirements are less onerous if the dithering frequency components are maximized, e.g. by a DDA algorithm. In Johan's example, add 442 to a variable each main PWM cycle. If; /rsgb_lf_group-archives/html/rsgb_lf_group/2004-05/msg00045.html (10,420 bytes)
3. LF: Re: Re: VDC source with microvolt resolution (score: 1): Author: "Johan Bodin" <[email protected]>; Date: Thu, 13 May 2004 22:43:07 +0100; Hi Alberto, It rests to see if the AT90S8535 (you know that, do you ? :-) allows this "change over the nose" of the PWM limits fast enough to be effective. I can't see that as a problem. Timer1 overf; /rsgb_lf_group-archives/html/rsgb_lf_group/2004-05/msg00053.html (10,982 bytes)

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