Abstract :
Multiple-input circuits that count the number of their inputs that are in a given state (normally logic ONE) are called parallel counters. In this paper three separate types of counters are described, analyzed, and compared. The first counter consists of a network of full adders. The second counter uses a combination of full adders and fast adders (that may be realized with READ-ONLY memories), while the third type of counter uses quasi-digital (i.e., analog current summing) techniques to generate an analog signal proportional to the count which is then digitized.
Keywords :
Associative processors, carry-shower counters, computer arithmetic units, digital counters, full-adder counters, multipliers, parallel counters, quasi-digital processing, READ-ONLY memory fast adders, response counters.; Adders; Aircraft; Counting circuits; Delay; Digital arithmetic; Logic circuits; Logic devices; Logic gates; Signal generators; Upper bound; Associative processors, carry-shower counters, computer arithmetic units, digital counters, full-adder counters, multipliers, parallel counters, quasi-digital processing, READ-ONLY memory fast adders, response counters.;
