Decimal-to-Binary Encoder

This page contains Verilog-A model of the decimal to binary encoder.

Usage:

1. Create a new cell in Library Manager named dec2bin and select cell type Verilog A;
2. Copy and paste the code provided;
3. Specify binary_bits variable to be the desired binary bits number;
4. Perform Check and Save;
5. A cell symbol will be created;
6. Instantiate dec2bin cell into your design;
7. Perform Check and Save and run the simulation.

1// Decimal number to binary code converter
2// LSB is [0]
3// Change binary_bits variable for your needs!
4// Author: A. Sidun
5// Source: AnalogHub.ie
6
7`include "constants.vams"
8`include "disciplines.vams"
9`define binary_bits 8				// define number of binary bits here
10
11module dec2bin(out);
12output [`binary_bits-1:0] out;
13voltage [`binary_bits-1:0] out;
14
15parameter real decimal_number = 5;
16parameter real vdd = 1.0;			// voltage level of logic 1 (V)
17parameter real vss = 0;				// voltage level of logic 0 (V)
18real dout[`binary_bits-1:0];		// internal result variable
19genvar i;
20real x;
21real z;
22
23analog begin
24// Converting decimal to binary using modulus of 2
25	x = decimal_number;
26while (x!=0) begin
27	for (i = 0; i <`binary_bits; i = i + 1) begin
28		z = x/2.0;
29		x = floor(z);	
30		dout[i] = ceil(z - x);
31	end
32end
33
34// Plotting outputs
35for (i=0; i<`binary_bits; i=i+1)
36	    V(out[i]) <+ transition(dout[i]*vdd,0,0);
37end
38
39endmodule