Contents
What is the meaning of mod-8 counters?
A mod-8 counter stores a integer value, and increments that value (say) on each clock tick, and wraps around to 0 if the previous stored value was 7.
What is the modulus of a counter?
The modulus of a counter is the number of states in its count sequence. The maximum possible modulus is determined by the number of flip-flops. For example, a four-bit counter can have a modulus of up to 16 (2^4).
How do you make a modulus counter?
Design Mod – N synchronous Counter
- Introduction :
- Design for Mod-N counter :
- Step 1 : Decision for number of flip-flops –
- Step 2 : Write excitation table of Flip flops –
- Step 3 : Draw state diagram and circuit excitation table –
- Circuit excitation table –
What is up down counter in digital?
An up-down counter is a combination of an up-counter and a down-counter. It can count in both directions, increasing as well as decreasing. Depending on the type of clock inputs, counters are of two types: asynchronous counters and synchronous counters.
How many flip flops are required for a mod-8 counter?
3 flip-flop counter
So a 3 flip-flop counter will have a maximum count of 23 = 8 counting states and would be called a MOD-8 counter.
What is a mod 6 counter?
They are created by connecting multiple flip-flops to one another (such that the output of one flip-flop is the input for another), and by connecting the complement of the output of the last flip-flop to the input of the first flip-flop. For a mod 6 Johnson counter, 3 flip-flops are required.
How is counter value calculated?
The obvious method is to feed the measurement signal into a counter chip which is turned on for a set period e.g. 1 second. The counter value is actually the frequency measurement since: f = events/time = counter value/1 second = counter value in Hz.
Is mod counter synchronous or asynchronous?
As synchronous counters are formed by connecting flip-flops together and any number of flip-flops can be connected or “cascaded” together to form a “divide-by-n” binary counter, the modulo’s or “MOD” number still applies as it does for asynchronous counters so a Decade counter or BCD counter with counts from 0 to 2n-1 …
What is the maximum modulus of a 4 bit counter?
Exercise :: Counters – General Questions
| 54. | A 4-bit counter has a maximum modulus of ________. |
|---|---|
| A. 3 B. 6 C. 8 D. 16 Answer: Option D Explanation: No answer description available for this question. Let us discuss. Workspace Report errors Name : Email: View Answer Discuss |
What is 4 bit up-down counter?
The SN74HC193 device is a 4-bit synchronous, reversible, up/down binary counter. This feature allows the counters to be used as modulo-N dividers simply by modifying the count length with the preset inputs. A clear (CLR) input has been provided that forces all outputs to the low level when a high level is applied.
How do the up counter count?
Bidirectional counters, also known as Up/Down counters, are capable of counting in either direction through any given count sequence and they can be reversed at any point within their count sequence by using an additional control input as shown below.
How is the value of a MOD-8 counter stored?
A mod-8 counter stores a integer value, and increments that value (say) on each clock tick, and wraps around to 0 if the previous stored value was 7. So, the stored value follows a cycle: 000 001 010 011 100 101 110 111
Which is mode control input for Ripple up counter?
UP/DOWN − So a mode control input is essential. For a ripple up counter, the Q output of preceding FF is connected to the clock input of the next one. For a ripple up counter, the Q output of preceding FF is connected to the clock input of the next one.
How does an asynchronous counter work in digital logic?
1. Asynchronous Counter In asynchronous counter we don’t use universal clock, only first flip flop is driven by main clock and the clock input of rest of the following flip flop is driven by output of previous flip flops. We can understand it by following diagram-
What do you call a 2 bit ripple counter?
The 2-bit ripple counter is called as MOD-4 counter and 3-bit ripple counter is called as MOD-8counter. So in general, an n-bit ripple counter is called as modulo-N counter. Where, MOD number = 2n.