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