Version 4
SHEET 1 1140 680
WIRE 368 -48 368 -80
WIRE 768 -48 768 -80
WIRE 368 64 368 32
WIRE 768 64 768 32
FLAG 768 64 0
FLAG 768 -80 half
FLAG 368 64 0
FLAG 368 -80 half1
SYMBOL bv 768 -64 R0
SYMATTR InstName B1
SYMATTR Value V=2*if(V(sine)<0, V(sine),0)
SYMBOL bv 368 -64 R0
SYMATTR InstName B2
SYMATTR Value V=2*if(V(sine)>0, V(sine),0)
TEXT 352 -192 Left 2 !.tran 0 50m 0 20u