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.
User-Agent: Mozilla/5.0 (Windows; U; Win98; en-US; rv:1.0.1) Gecko/20020826
X-Accept-Language: en-us, en
Subject: Re: More:Inductance to Voltage
Date: Sun, 06 Oct 2002 04:01:39 GMT
NNTP-Posting-Date: Sun, 06 Oct 2002 04:01:39 GMT
Organization: AT&T Worldnet
Bruce Kingsley wrote:
> A 1Khz sine wave signal is feed into a 1k ohm resistor, then to a 7.9 mH
> inductive proximity sensor. As capacitors are added across the inductor, the
> amplitude grows. Why? I would have figured the capacitor would have lowered
> the amplitude. The inductor is designed for a 400 mV signal, but when the
> capacitors (2 uf) are added the signal grows to almost 1 volt. Am I
> endangering the inductor?
An inductor and capacitor in parallel form a resonant circuit. The freq
of resonance is 1/(2*pi*(sqrt(L*C))). For your 7.9mH and 2uF cap the
resonant freq is 1.27kHz. Run the freq much less than 1K and much
greater than 1K and the amplitude will decrease.
This is the basic of AM radio. Tune the LC to the AM band.... tie
one end to an antenna.... and walla! Out comes the signal.
Here's a link
Go Back To The Cyber-Spy.Com
Usenet Web Archive Index Of
The sci.electronics.design Newsgroup