Re: attenuator (David Smith )


Subject: Re: attenuator
From:    David Smith  <smithd@xxxxxxxx>
Date:    Thu, 17 Nov 2011 17:23:27 -0600
List-Archive:<http://lists.mcgill.ca/scripts/wa.exe?LIST=AUDITORY>

--Apple-Mail-1--332375738 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=UTF-8; delsp=yes; format=flowed Pawel, There are hundreds of different "digital potentiometer" chips =20 available to do this. For example: Dual 8 bit digital potentiometer ,3 wire serial port, clocked =20 communications. Accuracy is typically specified in parts/million. You can use them directly on analog audio or use them to set gain of =20 amplifier stage. Communication software for this is trivial if you can flip a few bits =20= on a computer port. Dave Smith On Nov 17, 2011, at 3:40 PM, Pawe=C5=82 Ku=C5=9Bmierek wrote: > Dear list, > > I was wondering if you know of any commercialbly available precise =20 > digitally controlled (i.e., repeatable) attenuator with fast and =20 > quiet attenuation changing. Preferably, but not necessarily =20 > controlled via RS232. > > All suggestions welcome, > > Thank you, > > Pawel Kusmierek --Apple-Mail-1--332375738 Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset=UTF-8 <html><body style=3D"word-wrap: break-word; -webkit-nbsp-mode: space; = -webkit-line-break: after-white-space; "> <div>Pawel,</div><div><br></div><div>There are hundreds of different = "digital potentiometer" chips available to do this.</div><div>For = example:</div><div><br></div><div></div><div><a = href=3D"http://search.digikey.com/us/en/products/DS1801S%252B/DS1801S%252B= -ND/1017610">Dual 8 bit digital potentiometer ,3 wire serial port, = clocked communications.</a></div><div><br></div><div>Accuracy is = typically specified in parts/million. =C2=A0</div><div>You can use them = directly on analog audio or use them to set gain of amplifier = stage.</div><div>Communication software for this is trivial if you can = flip a few bits on a computer port.</div><div><br></div><div>Dave = Smith</div><div><br></div><div><br></div><div><br></div><br><div><div>On = Nov 17, 2011, at 3:40 PM, Pawe=C5=82 Ku=C5=9Bmierek wrote:</div><br = class=3D"Apple-interchange-newline"><blockquote type=3D"cite"><div>Dear = list,</div><div>=C2=A0</div><div>I was wondering if you know of any = commercialbly available=C2=A0precise digitally controlled=C2=A0 (i.e., = repeatable) attenuator with fast and quiet attenuation changing. = Preferably, but not necessarily controlled via RS232.</div> = <div>=C2=A0</div><div>All suggestions = welcome,</div><div>=C2=A0</div><div>Thank = you,</div><div>=C2=A0</div><div>Pawel = Kusmierek</div></blockquote></div><br></body></html>= --Apple-Mail-1--332375738--


This message came from the mail archive
/var/www/postings/2011/
maintained by:
DAn Ellis <dpwe@ee.columbia.edu>
Electrical Engineering Dept., Columbia University