N number of EX-NOR gates is connected in series such that the N inputs (A0, A1, A2......) are given in the following way:
A0 and A1 is being given to first EX-NOR gate and A2 and output of first EX-NOR is being given to second EX-NOR gate and so on. Nth EX-NOR gate's output is final output. How does this circuit work? Explain in detail?
Solution:
A0 and A1 is being given to first EX-NOR gate and A2 and output of first EX-NOR is being given to second EX-NOR gate and so on. Nth EX-NOR gate's output is final output. How does this circuit work? Explain in detail?
Solution:
If N= Odd ( # of EX-NOR gates are Odd), the circuit acts as even parity detector, i.e. the output will 1 if there are even number of 1's in the inputs. This could also be called as odd parity generator since with this additional 1 as output the total number of 1's will be Odd.
If N= Even ( # of EX-NOR gates are Even), the circuit acts as odd parity detector, i.e. the output will 1 if there are odd number of 1's in the inputs. This could also be called as even parity generator since with this additional 1 as output the total number of 1's will be Even.
If N= Even ( # of EX-NOR gates are Even), the circuit acts as odd parity detector, i.e. the output will 1 if there are odd number of 1's in the inputs. This could also be called as even parity generator since with this additional 1 as output the total number of 1's will be Even.
84 comments:
Hi Suresh,
I have a doubt with the parity detector in digital column.
can you please recheck and explain with example.
Can you please tell me what does "N" indicate.Is that the number of input digits ?
thank you
Hi Tan,
N is the total number of EX-NOR gates in the circuit. If you have 3 EX-NOR gates in your design, then you have 4 number of inputs. A0, A1, A2 and A3. This circuit will detect the even parity - output will be '1' if you have even number of '1's in your input.
Say for Ex, if A0=A1=A2=A3=1, Then the output will be '1', if A0=A1=A2=1 and A3=0, then the output will be '0'
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