diff --git a/Problemas Diseno circuitos/problema_4.asc b/Problemas Diseno circuitos/problema_4.asc
new file mode 100644
index 0000000000000000000000000000000000000000..587b5789d55c630e25a7b7e77b3d3096fb470703
--- /dev/null
+++ b/Problemas Diseno circuitos/problema_4.asc	
@@ -0,0 +1,80 @@
+Version 4
+SHEET 1 1136 680
+WIRE 480 -16 272 -16
+WIRE 656 -16 560 -16
+WIRE 800 -16 656 -16
+WIRE 928 -16 880 -16
+WIRE 656 16 656 -16
+WIRE 704 16 656 16
+WIRE 928 32 928 -16
+WIRE 928 32 768 32
+WIRE 1024 32 928 32
+WIRE 704 48 656 48
+WIRE 480 80 400 80
+WIRE 656 80 656 48
+WIRE 656 80 560 80
+WIRE -80 144 -80 128
+WIRE 64 144 -80 144
+WIRE -80 176 -80 144
+WIRE 64 176 64 144
+WIRE 656 192 656 80
+WIRE 672 192 656 192
+WIRE 272 224 272 -16
+WIRE 400 224 400 80
+WIRE 672 224 672 192
+WIRE 272 352 272 304
+WIRE 400 352 400 304
+WIRE 672 352 672 304
+FLAG 272 352 0
+FLAG 400 352 0
+FLAG 672 352 0
+FLAG -80 48 Vs+
+FLAG 736 0 Vs+
+FLAG 64 176 0
+FLAG -80 256 Vs-
+FLAG 736 64 Vs-
+FLAG 1024 32 Vout
+IOPIN 1024 32 Out
+SYMBOL voltage -80 32 R0
+WINDOW 123 0 0 Left 0
+WINDOW 39 0 0 Left 0
+SYMATTR InstName V1
+SYMATTR Value 5
+SYMBOL voltage -80 160 R0
+WINDOW 123 0 0 Left 0
+WINDOW 39 0 0 Left 0
+SYMATTR InstName V2
+SYMATTR Value 5
+SYMBOL voltage 272 208 R0
+WINDOW 123 0 0 Left 0
+WINDOW 39 0 0 Left 0
+SYMATTR InstName V3
+SYMATTR Value 0
+SYMBOL voltage 400 208 R0
+WINDOW 123 0 0 Left 0
+WINDOW 39 0 0 Left 0
+SYMATTR InstName V4
+SYMATTR Value 0
+SYMBOL res 576 -32 R90
+WINDOW 0 0 56 VBottom 2
+WINDOW 3 32 56 VTop 2
+SYMATTR InstName R1
+SYMATTR Value 10k
+SYMBOL res 576 64 R90
+WINDOW 0 0 56 VBottom 2
+WINDOW 3 32 56 VTop 2
+SYMATTR InstName R2
+SYMATTR Value 10k
+SYMBOL res 896 -32 R90
+WINDOW 0 0 56 VBottom 2
+WINDOW 3 32 56 VTop 2
+SYMATTR InstName R3
+SYMATTR Value 50k
+SYMBOL res 688 320 R180
+WINDOW 0 36 76 Left 2
+WINDOW 3 36 40 Left 2
+SYMATTR InstName R4
+SYMATTR Value 50k
+SYMBOL OpAmps\\LT6201 736 32 R0
+SYMATTR InstName U1
+TEXT -114 376 Left 2 !.tran 2