Analog Switch

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vcpatel36 18 years ago

I have a DSPT dual single pole double throw analog switch (Dual channel 2:1 mux/demux). Now I have some questions regarding analog switches?

How do these differ from digital mux which I am faimilar with (which is basically a selector between multiple inputs based on some select signals)? Whats strange is the schematic of the circuit uses digital signals TTL as inputs/outputs? I read some where that some analog switches allow digital signals?

The part says its a switch (mux/demux). Does that mean the inputs and outputs can be swapped. Basically is it like a physical connection between 2 set of pins based on a select line. Because from my understanding thats what a switch is? more over it says its mux/demux?

I hope someone can clarify this.

-- Vishal

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Fred Bloggs 18 years ago

Vishal, sounds like you're too stupid to read a datasheet, so what makes you think we can clarify the situation for you?

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Jim Thompson 18 years ago

Analog switches may be thought of a simple physical switches, except with (sometimes substantial) resistance.

Only the CONTROLS of an analog switch are digital.

Usually they are bi-directional. However some VIDEO muxes have buffers, which render them uni-directional.

...Jim Thompson

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Jim Thompson 18 years ago

Here we have the proof that a mother-in-hip-boots makes you cranky ;-)

...Jim Thompson

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Martin Griffith 18 years ago

Can I make a video of you and Teh Phil from oz in bed together?

I've just upgraded from Ampex Ace editing stuff to move_eeeemaker, it should be quite good, even frame accurate

Video_cum_splash_screen optional

(bored)

martin

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Jon Slaughter 18 years ago

A digital mux only passes digital signals. An analog switch passes analog signals! Thats a big difference.

Basically its like a BJT designed to run as a switch or as a driver... but in this case its probably fets.

Yes. If its analog then it can, but not always, run in both direction. Basically if you have n to 1 and you swap it then its 1 to n.

(think about it using normal mechanical switches... there should be no difference except "relativity"... this isn't always the case though, say if there are diodes in the paths)

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John Fields 18 years ago

You do?

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Joerg 18 years ago

[...]

A SW manager said it's the other way around. At least since Max Planck.

Regards, Joerg http://www.analogconsultants.com/ "gmail" domain blocked because of excessive spam. Use another domain or send PM.

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John Fields 18 years ago

Well, yes, of course, if you want to get into the hallowed hall of grits versus jello. This thread, though, is about voltage changes versus changes in time, which is analog. JF

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John Devereux 18 years ago

sci.electronics.design.... where *anything* is on topic... Except basic electronics. :)

[...]

John Devereux

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Joerg 18 years ago

Unless it's electronic voting machines :-)

SCNR, Joerg http://www.analogconsultants.com/ "gmail" domain blocked because of excessive spam. Use another domain or send PM.

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John Fields 18 years ago

Actually, it _is_ on topic, but hardly appropriate in our rarified air. ;) JF

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vcpatel36 18 years ago

thanks to those who replied. i am sorry if this question didn't belong here.

@john fields... a piece of advise... if you don't want to answer then its fine at least you don't have to act as a smart a**

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John Fields 18 years ago

It\'s not an act, (That means I really _am_ a smartass, you semi-literate babboon.) and I _did_ answer: "Your question belongs in sci.electronics.basics, and you could help by posting the manufacturer and a part number. In any case, if it\'s described as a mux/demux then it must be bidirectional since a multiplexer (mux) will connect one of several inputs to a single output, while a demux will connect a single input to one of several outputs. That means its input(s) and output(s) can be swapped." Then, you ungrateful whelp, not only did you not thank me for my excellent logic at arriving at a good and valid answer, nor post the manufacturer and part number, as requested, (for further refinement of the answer, if necessary) you chose to get an attitude because you got your feathers a little ruffled. Well, I think Fred Bloggs\' comment and the fact that you post from google groups pretty much says it all. As for your "advise", I suggest you stick it where it belongs. Yup, up your ass. JF

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JosephKK 18 years ago

Go read comp.risks for a while. It seems you need to.

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Analog Switch

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