13635245
Description
Flashcards by Steven Pearson, updated more than 1 year ago
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Created by Steven Pearson
over 6 years ago
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| Question | Answer |
| outline the main rules to be observed when designing fundamental mode circuits | 1) only one input signal is allowed to change at a time 2) before the next input signal is allowed to change, the circuit must be given time to enter astable state. |
| under what circumstance does a race condition occur within an asynchronous logic circuit? | when two or more state variables are supposed to change at the same time due to a change in the input |
| explain with diagrams the difference between sequential and combinational logic circuits | combinational output relies only on the present state sequential output relies on present state and historical states, it contains memory (draw them, same as other flashcards) |
| explain the difference between synchronous and asynchronous counters | *synchronous counters all use a single external clock, they are faster *asynchronous clocks are fed from the output of the previous flipflop, known as ripple counters |
| Explain the differences between Mealy and Moore state machines | |
| Perform the following arithmetic operation using BCD system +27 +46 =73 | |
| what is a decoder? | its function is to detect the presence of a specific combination |
| what is an encoder? | its function is to convert inputs into boolean logic |
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