RTL NAND

RESISTOR TRANSISTOR LOGIC :- For the RTL NAND circuit, BJTs are connected in series combinations.The collector of the first transistor is tied with the collector supply voltage (Vcc) through a collector resistor Rc. The base of every transistor is connected to the different applied Input voltage through base resistor Rb. For the LOW input signal, BJT goes to the cut-off state and for the HIGH input signal, BJT goes to a saturation state.