Wednesday 4 November 2015

digital logic - Use BJT transistor as a switch without inverting the signal


I know I can use a transistor as a switch like this:


schematic


simulate this circuit – Schematic created using CircuitLab



Can I use only one transistor that will output the same signal (not inverted)? I want to use it to shift voltage level. The input is digital at 3.3V and should output 5V TTL levels.



Answer



This circuit tends to be used quite often: -


enter image description here


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