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Analog Switch

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?

1. 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?

2. 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
 
M

Martin Griffith

Jan 1, 1970
0
Vishal, sounds like you're too stupid to read a datasheet, so what makes
you think we can clarify the situation for you?

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
 
J

Jon Slaughter

Jan 1, 1970
0
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?

1. 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?

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.
2. 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?

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)
 
J

Joerg

Jan 1, 1970
0
John Fields wrote:

[...]
And why shouldn't they? After all, a digital signal _is_ an analog
signal.


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

John Devereux

Jan 1, 1970
0
John Fields said:
---
You do?
---


---
You did?

And why shouldn't they? After all, a digital signal _is_ an analog
signal.

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

[...]
 
J

Joerg

Jan 1, 1970
0
John said:
sci.electronics.design.... where *anything* is on topic... Except
basic electronics. :)

Unless it's electronic voting machines :)
 
---
Actually, it _is_ on topic, but hardly appropriate in our rarified
air. ;)

JF

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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