INTRODUCTION --
The Radio Push-Button has an interesting function, where pushing one momentary button of several gives a latched output representing that button, simultaneously cancelling the latched output from the previously pressed button.
This article disscusse a simple circuit, using CD4049 inverters, that performs that function.
Similar circuits are posted on the web, but may not be reliable due to lack of isolation between the input and output of the latch circuit, which is added...