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Im new here!

I been having some trouble thinking about a circuit wich selects one of two outputs based in the value of a square wave function like this Input//Output

To put some numbers Freqs

Vin=1Hz

Vout1=1kHz

Vout2=5kHz

without using any type of logic gates, I've tried with op amps, bjt, and some jfets ideas without success. Is there any generic type of circuits that I can study to make this work?

Thanks a lot

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  • \$\begingroup\$ a SPDT relay ... \$\endgroup\$
    – jsotola
    Commented Apr 30, 2022 at 3:13
  • \$\begingroup\$ I'm not sure it's helpful to your problem statement to call the selection input a "square wave function", as this just seems to needlessly complicate the description. It's really just a binary (2 state) input - the fact that you might drive it with a square wave doesn't really have any impact on its behavior. \$\endgroup\$
    – brhans
    Commented Apr 30, 2022 at 5:45

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One idea is to use a single pole double throw (SPDT) analog switch IC such as this

Select which input (B0 or B1) is connected to the output A by the logic level of S.

Make sure the signal is in range of the chip's specifications and power supply though. There are many different options of a chip like this one. You may need to choose one to match your power supply, signal bandwidth, and package type.

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  • \$\begingroup\$ And if the OP is morally opposed to integrated circuits they could always build analog switches from MOSFETs. \$\endgroup\$
    – Elliot Alderson
    Commented Apr 30, 2022 at 9:42

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