Added lvds and sampler

rtl/arch/gw1/lvds_comparator.v

@@ -0,0 +1,17 @@
+`timescale 1ns/1ps
+
+// =============================================================================
+// LVDS comparator
+// Instantiating a GW1 TLVDS_IBUF
+// =============================================================================
+module lvds_comparator(
+    input wire a,
+    input wire b,
+    output wire o
+);
+    TLVDS_IBUF lvds_buf (
+        .O(o),
+        .I(a),
+        .IB(b)
+    );
+endmodule