Sure, here's an example of a 2:4 demultiplexer implemented using gates in SystemVerilog:
module demux_2to4_gates(
input logic in,
input logic [1:0] sel,
output logic out0,
output logic out1,
output logic out2,
output logic out3
);
assign out0 = in &
sel[1] &
sel[0];
assign out1 = in &
sel[1] & sel[0]; assign out2 = in & sel[1] &
sel[0];
assign out3 = in & sel[1] & sel[0];
endmodule
In this code, we define a module called `demux_2to4_gates` with two input ports `in` and `sel`, and four output ports `out0`, `out1`, `out2`, and `out3`. The `in` input is a single-bit binary value representing the input to the demultiplexer, the `sel` input is a 2-bit binary value representing the selection signal, and the `out0`, `out1`, `out2`, and `out3` outputs are single-bit binary values representing the demultiplexer outputs. The `assign` statements use logical operators to implement the demultiplexer functionality. Each output is set to the AND of the input signal `in` and a combination of the selection signals `sel`. The selection signals are used to determine which output should be set to 1 and which outputs should be set to 0. The NOT operator `
` is used to invert the selection signals as needed.
For example, if the input signal `in` is 1 and the selection signal `sel` is `2’b01`, the output signal `out1` will be set to 1 and the other output signals will be set to 0.
You can instantiate this module in your top-level design hierarchy and connect it to other modules or input/output signals as needed. Note that you can modify the code to implement a demultiplexer with a different number of inputs or outputs by changing the bit width of the input and output signals, and modifying the demultiplexer logic accordingly.