system design using cyclone II

Hi Dave, thanks for clearing up.

here is the link for the PSD: "en.wikipedia.org/wiki/Position_sensitive_device"

the modulation is performed in the analog domain by somebody else. I dont have a clear mind of what the process is, I can ask him if this is really important to my design.

Here is a piece of code I found on line which can transfer a clock into a sine/cosine wave

("edaboard.com/thread39599.html"):

module sine_cos(clk, reset, en, sine, cos);

input clk, reset, en;

output [7:0] sine,cos;

reg [7:0] sine_r, cos_r;

assign sine = sine_r + {cos_r[7], cos_r[7], cos_r[7], cos_r[7:3]};

assign cos = cos_r - {sine[7], sine[7], sine[7], sine[7:3]};

always@(posedge clk or negedge reset)

begin

if (!reset) begin

sine_r <= 0;

cos_r <= 120;

end else begin

if (en) begin

sine_r <= sine;

cos_r <= cos;

end

end

end

endmodule // sine_cos

so, if the code works, instead of using NCO, I can transform a square wave into a sine wave right? as long as I get a 154Khz clock.

Allison