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`timescale 1ns / 1ps

module test_quad_filter();
    reg clk;
    reg rst;
    reg q;
    wire qf;

    initial
    begin
	//$display ("time\t clk q qf");
	//$monitor ("%g\t %b %b %b", $time, clk, q, qf);
	$dumpfile ("test_quad_filter.vcd");
	$dumpvars;
	clk = 1;
	rst = 0;
	q = 0;
	#1 rst = 1;
	#4 q = 1;
	#4 q = 1;
	#4 q = 1;
	#4 q = 1;
	#4 q = 0;
	#4 q = 0;
	#4 q = 0;
	#4 q = 0;
	#4 q = 0;
	#4 q = 1;
	#4 q = 0;
	#4 q = 0;
	#4 q = 0;
	#4 q = 0;
	#4 q = 0;
	#4 $finish;
    end

    // Clock generator.
    always
	#2 clk = !clk;

    // Instantiation.
    quad_filter UUT (clk, rst, q, qf);
endmodule