A reliable method for eliminating decoder spikes is to use strobing.

More Questions from Counters

• Dependency notation is no longer used.
• Most sequential circuits contain a combinational logic section and a memory section.
• The terminal count of a typical modulus-10 binary counter is 1010.
• In a 74192 BCD decade up-/down-counter, the terminal count up and the terminal count down are active-LOW.
• When implementing a complete system application using IC counter chips, output devices such as LED indicators must be configured to operate from the counter outputs.
• Generally speaking, the synchronous counter requires more circuitry than an asynchronous counter.
• In many cases, counters must be strobed in order to eliminate glitches.
• The 7447 has a 4-bit BCD input, seven individual active-LOW outputs, and a ripple blanking input and output.
• Asynchronous counters are known as modulus counters.
• Three cascaded modulus-10 counters have an overall modulus of 1000.

Discussion & Comments