diff --git a/verilog/rtl/lvlshiftdown.v b/verilog/rtl/lvlshiftdown.v
new file mode 100644
index 0000000..a647cf6
--- /dev/null
+++ b/verilog/rtl/lvlshiftdown.v
@@ -0,0 +1,30 @@
+/* Level shifter (simplified model, as buffer only) */
+
+module lvlshiftdown (
+`ifdef LVS
+        vpwr, vpb, vnb, vgnd,
+`endif
+        A,
+        X
+    );
+
+
+`ifdef LVS
+    input vpwr;
+    input vpb;
+    input vnb;
+    input vgnd;
+`endif
+
+input A;
+output X;
+
+`ifdef LVS
+    wire vpwr, vpb, vnb, vgnd;
+`endif
+
+wire A, X;
+
+assign X = A;
+
+endmodule   // lvlshiftdown