Post by thread:relay substitute

I'm working on Voice Multiplexer and I'm looking for a SPSP relay substitute. The relay I've bought is too noisy, you can hear it vibrate. It has caused my circuit to malfunction. The signal I want to switch is an ac-coupled square wave, 3.0 Vp-p. Is there any suggestion? Thanks, Jane ===== *~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~ Jane Ifurung UP Diliman, Quezon City 920-5301 loc 5854 (632)731-3545 spam_OUTjifurungTakeThisOuTeee.upd.edu.ph *~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~ __________________________________________________ Do You Yahoo!? Talk to your friends online with Yahoo! Messenger. http://im.yahoo.com

> I'm working on Voice Multiplexer and I'm looking for a > SPSP relay substitute. The relay I've bought is too > noisy, you can hear it vibrate. It has caused my > circuit to malfunction. > > The signal I want to switch is an ac-coupled square > wave, 3.0 Vp-p. Is there any suggestion? 4066 or similar analog switches. You'll need to make sure that the signal voltage does not go outside the power rails, but these have a negative rail, so you can use a bipolar supply, or single ended, if you ac couple into the switch, and bias the switch to half the supply.

Thanks, Mr. Dave. I've tried using 4066 as relay alternative but when I wanted the signal not to pass through, the 4066 did not entirely switch the signal off--- it just attenuated the signal. What is a better alternative? --- Dave VanHorn <.....dvanhornKILLspam@spam@CEDAR.NET> wrote: {Quote hidden}> > I'm working on Voice Multiplexer and I'm looking > for a > > SPSP relay substitute. The relay I've bought is > too > > noisy, you can hear it vibrate. It has caused my > > circuit to malfunction. > > > > The signal I want to switch is an ac-coupled > square > > wave, 3.0 Vp-p. Is there any suggestion? > > 4066 or similar analog switches. You'll need to make > sure that the signal > voltage does not go outside the power rails, but > these have a negative rail, > so you can use a bipolar supply, or single ended, if > you ac couple into the > switch, and bias the switch to half the supply. > ===== *~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~ Jane Ifurung UP Diliman, Quezon City 920-5301 loc 5854 (632)731-3545 jifurungKILLspameee.upd.edu.ph *~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~ __________________________________________________ Do You Yahoo!? Talk to your friends online with Yahoo! Messenger. http://im.yahoo.com

there is an opto-isolator..6-pin device called ocmos ssr.. look in http://www.digikey.com on resistance is 2-4 ohms...off resistance in meg ohms...........they have nc and no units in single package and also dual packages..........100ma @ 100v if i recall correct...........i've used them and they work great....... {Original Message removed}

---------- > From: Jane Ifurung <.....jane_ifurungKILLspam.....YAHOO.COM> > To: EraseMEPICLISTspam_OUTTakeThisOuTMITVMA.MIT.EDU > Subject: Re: relay substitute > Date: Monday, January 17, 2000 10:30 > > Thanks, Mr. Dave. I've tried using 4066 as relay > alternative but when I wanted the signal not to pass > through, the 4066 did not entirely switch the signal > off--- it just attenuated the signal. > What is a better alternative? With 3/4 4066 you can make a T switch that attenuates much better: two switches in series, one from the common point to the ground. Wouter