plltop.vams

phase frequency detector verilog

`include "constants.vams"
`include "disciplines.vams"
`timescale 10ps / 1ps

module plltop ();
    electrical gnd;
    ground gnd;
    reg reset;

    initial begin
	reset = 1;
	#100
	reset = 0;
    end

    vsource #(.type("sine"), .ampl(2.5), .dc(2.5), .freq(15M)) Vin (ref, gnd);
    pfd PFD (.reset(reset), .qinc(up), .active(fb) , .ref(ref), .qdec(dwn));
    cp #(.cur(1m)) CP (.nout(gnd), .dec(dwn), .inc(up), .pout(err));
    capacitor #(.c(30n)) C (err, err2);
    resistor #(.r(200)) R (err2, gnd);
    vco #(.f0(1.5E9), .kvco(50.0E6), .rin(100k)) VCO (.ps(err), .ns(gnd), .out(out));
    fd FD (.reset(reset), .out(fb), .clk(out));
endmodule