Version 4 SHEET 1 1412 992 WIRE 640 -208 640 -288 WIRE 736 -128 688 -128 WIRE 640 -32 640 -112 WIRE 736 -32 736 -128 WIRE 736 -32 640 -32 WIRE 880 -32 736 -32 WIRE 896 -32 880 -32 WIRE 240 64 240 0 WIRE 640 64 640 -32 WIRE -432 80 -480 80 WIRE -144 80 -192 80 WIRE -944 112 -944 48 WIRE -480 128 -480 80 WIRE -144 128 -144 80 WIRE -528 144 -576 144 WIRE -48 144 -96 144 WIRE 192 144 112 144 WIRE 768 144 688 144 WIRE -944 240 -944 192 WIRE -944 240 -1008 240 WIRE -528 240 -528 192 WIRE -480 240 -480 208 WIRE -320 240 -480 240 WIRE -144 240 -144 208 WIRE -144 240 -320 240 WIRE -96 240 -96 192 WIRE 240 240 240 160 WIRE 400 240 240 240 WIRE 432 240 400 240 WIRE 640 240 640 160 WIRE 640 240 432 240 WIRE -1008 256 -1008 240 WIRE -640 272 -640 208 WIRE -944 288 -944 240 WIRE -320 304 -320 240 WIRE 432 304 432 240 WIRE 384 384 320 384 WIRE -640 416 -640 352 WIRE -944 432 -944 368 WIRE -320 432 -320 384 WIRE 320 448 320 384 WIRE 432 448 432 400 WIRE 432 448 320 448 WIRE 432 480 432 448 FLAG 880 -32 OUT FLAG -1008 256 0 FLAG -944 48 VDD FLAG -944 432 VSS FLAG -192 80 IN- FLAG -320 432 0 FLAG -528 240 0 FLAG -96 240 0 FLAG -48 144 VD FLAG -320 240 VCM FLAG -576 144 VD FLAG -432 80 IN+ FLAG -640 416 0 FLAG -640 208 VD FLAG 640 -288 VDD FLAG 240 0 VDD FLAG 112 144 IN+ FLAG 768 144 IN- FLAG 400 240 S FLAG 432 480 VSS SYMBOL mesfet 384 304 R0 SYMATTR InstName Z3 SYMATTR Value n_mesfet 20 SYMBOL mesfet 688 -208 M0 SYMATTR InstName Z4 SYMATTR Value n_mesfet 10 SYMBOL voltage -944 96 R0 SYMATTR InstName Vps1 SYMATTR Value 5V SYMBOL voltage -944 272 R0 SYMATTR InstName Vps2 SYMATTR Value 5V SYMBOL voltage -320 288 R0 WINDOW 0 -73 13 Left 2 WINDOW 3 -63 94 Left 2 SYMATTR InstName Vcm SYMATTR Value 0V SYMBOL e -480 112 R0 SYMATTR InstName E1 SYMATTR Value 0.5 SYMBOL e -144 112 M0 SYMATTR InstName E2 SYMATTR Value -0.5 SYMBOL voltage -640 256 R0 WINDOW 0 -62 21 Left 2 WINDOW 3 -96 95 Left 2 SYMATTR InstName Vd SYMATTR Value 30mV SYMBOL mesfet 688 64 M0 SYMATTR InstName Z2 SYMATTR Value n_mesfet 100 SYMBOL mesfet 192 64 R0 SYMATTR InstName Z1 SYMATTR Value n_mesfet 100 TEXT -664 720 Left 2 !.model n_mesfet NMF (beta=0.1m Vto=-1.0V lambda=0.05) TEXT -432 664 Left 2 ;Device Models TEXT -1008 560 Left 2 ;Power Supplies TEXT -536 560 Left 2 ;Input Differential Signal with Common-Mode TEXT 176 720 Left 2 ;.DC Vd -5V 5V 10mV TEXT 200 664 Left 2 ;Spice Directives TEXT 312 560 Left 2 ;MESFET Differential Amplifier TEXT 136 768 Left 2 ;.DC Vd -200mV 200mV 10mV TEXT 208 824 Left 2 ;.TF V(OUT) Vd TEXT 280 864 Left 2 ;.OP TEXT 168 912 Left 2 !.DC Vcm -5V +5V 100mV