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I'm research about signal 2 state(+V ,-V) .So I have a question about multiplexer.I know that multiplexer is Digital circuit then input and output must be only 0 or 1 But in my research i need Analog circuit multiplexer like pic.1

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pic.1

from pic.1 ''321'' is control switch to choose input +Vt or -Vt

If switch is 1 output is +Vt . If switch is 0 output is -Vt

I do not sure that call multiplexer but i need circuit like this

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It's an analog multiplexer. There are a few members of the 4000 series and 74HC4000 series which do this (eg. 74HC4053). Most analog switch members will allow a +/-5V or +/-3V supplies and will level shift the input so they can be controlled with a 5V/0 or 3V/0 control signal respectively.

You can also find a plethora of higher performance analog switches such as this one which will operate from higher voltages, have better and more constant on-resistance, have built in protection, and are specified for things like charge injection and low leakage. Of course the cost will be higher.

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  • \$\begingroup\$ (1) No need to go the analog way. There is the misconception that zero/false must be ground and one/true vcc. The first computers built with DTL/RTL and all that kind of technologies used other voltages to define logic values. \$\endgroup\$
    – Borg Drone
    Commented Feb 11, 2023 at 19:10
  • \$\begingroup\$ (2) If a logic value is to be translated to voltages outside the scope of most TTL/CMOS logic the best way is first to have some power rails with the voltage to output and pull them using resistors over an open collector/drain component as 74LS06/74LS07 are. \$\endgroup\$
    – Borg Drone
    Commented Feb 11, 2023 at 19:13
  • \$\begingroup\$ I disagree, but feel free to add your own answer showing how you would solve this particular problem. \$\endgroup\$
    – Spehro 'speff' Pefhany
    Commented Feb 11, 2023 at 20:39
  • \$\begingroup\$ When I mean digital, I mean no values in between than the agreed true and false values. Also note that I place numbers in comments to specify their order if it is too long. I don't have time to write a proper response in this moment, but I will writer later this day, more to complement than replace yours which is already good. \$\endgroup\$
    – Borg Drone
    Commented Feb 12, 2023 at 12:27

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