ABSTRACT
Fan-out - number of inputs that can be driven by one output. TTL: = 10 CMOS: = 50
Boolean algebra can be implemented using digital electronic circuits using combinations of logic gates, e.g., a combination of NAND gates gives a
logical XOR function:
A + B B + A Laws of Boolean algebra
In the circuit below, the XOR function is used to add binary digits A and B. The AND gate indicates whether or not there is a carry bit. This circuit is a half adder.
