From: Jim Thompson
Subject: Re: Current sensor circuit
X-Newsreader: Forte Agent 1.91/32.564
Organization: EasyNews, UseNet made Easy! - Test our service with our FREE trial at https://www.easynews.com/trial/trial.phtml
X-Complaints-Info: Please be sure to forward a copy of ALL headers otherwise we will be unable to process your complaint properly.
Date: Wed, 04 Sep 2002 01:07:11 GMT
On Wed, 04 Sep 2002 00:34:04 GMT,
Jim Thompson ,
In Newsgroup: sci.electronics.design,
Entitled: "Re: Current sensor circuit",
Wrote the following:
|On Tue, 03 Sep 2002 23:39:16 GMT,
|Jim Thompson ,
|In Newsgroup: sci.electronics.design,
|Entitled: "Re: Current sensor circuit",
|Wrote the following:
||On Thu, 29 Aug 2002 15:30:13 -0400,
||"Tom Blough" ,
||In Newsgroup: sci.electronics.design,
||Entitled: "Current sensor circuit",
||Wrote the following:
|||I have a CB radio in my car attached to a splitter so it can use the radio
|||antenna. The problem is that I have an electric antenna and if the stereo
|||is off or if I'm playing a CD, the radio antenna is down.
|||I need a circuit that senses current in the CB power wire and puts the
|||antenna up when the CB is on. The antenna raises when +12V is applied to
|||the control line.
|||Can anyone help?
||The way the Master would do it is posted on A/B.S.e ;-)
||Subject: Current Sense / Antenna Control - AntennaControl.pdf
|| ...Jim Thompson
|I should have added: Match the 12K resistors. We I/C designers think
|"match" automatically ;-)
| ...Jim Thompson
Never mind... brain sprain... it works perfectly fine with 20%
tolerances, due to logarithmic behavior of the transistors.
| James E.Thompson, P.E. | mens |
| Analog Innovations, Inc. | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| Phoenix, Arizona Voice:(480)460-2350 | |
| Jim-T@analog_innovations.com Fax:(480)460-2142 | Brass Rat |
| http://www.analog-innovations.com | 1962 |
For proper E-mail replies SWAP "-" and "_"
I love to cook with wine. Sometimes I even put it in the food.