For chapter 5 problem 13 for Fundamentals of Digital Logic with Verilog Design, I am curious...
For chapter 5 problem 13 for Fundamentals of Digital Logic with Verilog Design, I am curious to know where the equation 2^n if n is the number of fan ins comes from. This equation was used in the solution to answer the number of gates required due to the fan in requirement.
Homework Answers
Fan-in and fan-out
Fan-in and Fan-out are the parameters of Digital IC. Apart from voltage and current parameters of digital ic, these parameters has their own specification in bipolar families i.e TTL, DTL. Bipolar families construct logic circuits and basically it is technique for I C manufacture.
Fan-in :- Fan-in is defined as the number of in inputs a gate has. For example A two input gate will have fin-in = 2.
The fan-in defined as the maximum number of inputs that a logic gate can accept. If number of input exceeds, the output will be undefined or incorrect. It is specified by manufacturer and is provided in the data sheet.
Fan-out:- it is the maximum number of inputs of the same IC family that a gate can Drive without falling outside the specified output voltage limits Or fan-out is maximum number of gate at the output side of drive gate.
Higher the fan-out higher the current supply capacity of a gate. For example a fan out of 5 indicates that the gate can drive at the most 5 inputs of the same ic family.
Fan-out is also called as the loading factor. It means if specified fan-out of a gate is 10 then we should not load more than 10 gates because output logic level voltages can not be guaranteed.
It depends on the nature of input device that are connected to an output.
Fan-out:- it is the maximum number of inputs of the same IC family that a gate can Drive without falling outside the specified output voltage limits Or fan-out is maximum number of gate at the output side of drive gate.
Higher the fan-out higher the current supply capacity of a gate. For example a fan out of 5 indicates that the gate can drive at the most 5 inputs of the same ic family.
Fan-out is also called as the loading factor. It means if specified fan-out of a gate is 10 then we should not load more than 10 gates because output logic level voltages can not be guaranteed.
It depends on the nature of input device that are connected to an output.
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