Magnitude Comparator

Magnitude Comparator: A magnitude comparator is a combinational circuit that compares two binary numbers and determines their relative magnitude. The schematic block diagram in figure-1 has two inputs and three outputs. It compares two numbers for equality, less than and greater than conditions. Depending on the comparison, one of the output will be true and […]

Decoder and Encoder

Implementing with Decoders: A decoder is a combinational circuit that converts N-bit binary information to 2N unique output lines. It is able to represent upto 2N distinct elements of coded information. General type decoders usually come in sizes of Nx2N where N is the number of input lines. With a given input, only one of […]

Adder Circuits

Adder Circuits An adder is a combinational circuit that adds multi-bit (two or more). Different types of adders are: Half Adder : A combinational circuit that adds 2-bits Full Adder : A combinational circuit that adds 2-bits and a carry from the previous stage of addition. Ripple Carry Adder/ or Carry Propagate Adder: An adder that add […]

Design of Register using VHDL

AIM Write VHDL programs for the following circuits, check the wave forms and the hardware generated register                 shift register  Objective: The objective of this lab is to : revise the theory behind the working of the registers To learn VHDL coding for the registers Synthesize register using VHDL Verify the operation using functional Simulation […]

Design of Counters using VHDL

AIM Write a VHDL program for a counter and check the wave forms and the hardware generated Objective: Objective of this lab is to: Revise the theoretical work Learn the VHDL Coding Synthesize counters using VHDL Verify the functionality using ISIM simulator Theory: A digital counter is a sequential circuit consisting of a number of […]

Design of Flip-Flops in VHDL

AIM : Design of Flip-Flops in VHDL Objective: To revise the basic theory behind the working of the flip flops To understand the syntax of VHDL To synthesize and simulate using VHDL Theory: The theory extend from latches to flip-flops. the basic similarity and differences between a latch and a flip-flop being: Sl Latch Flip-Flop […]

Design of Code Converters in VHDL

AIM: CODE CONVERTERS IN VHDL Objective: To revise the basic theory behind the working of the Code Converters To synthesize and simulate using VHDL Theory of Code Converters: We, in our day-to-day life deal with numerous forms of data, it can be decimal digits and numbers, alphabets and string or even the special symbol e.g your […]

Design of Comparator in VHDL

AIM: Write a VHDL program for a comparator and check the wave forms and the hardware generated Objective: To understand the working of Comparator To learn VHDL codin To understand functional simulation Theory: A comparator is a combinational circuit that compares two objects and returns the outcome as “equal”, “less then”, or “greater then”. The […]

Synthesis of Encoder

Priority Encoder A priority Encoder encodes one of the many inputs but only the key having the highest priority is encoded first. If highest priority key is not pressed then the next lower priority key is encoded and so on. The functional table is given below, In the table Y0 and Y1 are the encoded […]

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