a data selection circuit selectively generates first and second complementary signals in response to an input signal so as to enable specific data paths and disable others . the circuit includes a non - inverting portion which generates an output signal having the same sense as the input signal , and an inverting portion which inverts the input signal . since the non - inverting portion has an extra inverting stage within it , a diode is coupled between the inverting portion and the true output for steering base drive away from the inverting portion when the input signal makes a low to high transition . in this manner , the inverting output is prevented from going low until the non - inverting goes high .