The Cyber-Spy.Com Usenet Archive Feeds Directly
From The Open And Publicly Available Newsgroup
This Group And Thousands Of Others Are Available
On Most IS NNTP News Servers On Port 119.
Cyber-Spy.Com Is NOT Responsible For Any Topic,
Opinions Or Content Posted To This Or Any Other
Newsgroup. This Web Archive Of The Newsgroup And
Posts Are For Informational Purposes Only.
From: Fred Bloggs
User-Agent: Mozilla/5.0 (Windows; U; Win 9x 4.90; en-US; rv:1.0.1) Gecko/20020823 Netscape/7.0
X-Accept-Language: en-us, en
Subject: Re: Cheap low frequency impedance bridge?
References: <3DA6E7D6.firstname.lastname@example.org> <email@example.com>
Date: Sat, 12 Oct 2002 16:27:20 GMT
NNTP-Posting-Date: Sat, 12 Oct 2002 09:27:20 PDT
Organization: EarthLink Inc. -- http://www.EarthLink.net
Bill Sloman wrote:
> The Analog Devices AD9854 DDS chip that produces tightly coupled
> in-phase and quadrature outputs
> is exactly what I'd love to be able to use - much neater (though
> probably no more effective) than the scheme Win Hill set around two AD
> DDS chips.
I cannot believe that you require ppm accuracy in measurement of a
parameter, indicative of wearout, that deviates over a 10:1 range. If
you can adjust the frequency to 200KHz for measurement of R with
adequate accuracy, then you certainly have the bandwidth for measuring
the time constant of a step response. Why isn't this good enough?
Go Back To The Cyber-Spy.Com
Usenet Web Archive Index Of
The sci.electronics.design Newsgroup