Version 4
SHEET 1 956 680
WIRE 16 -32 -144 -32
WIRE -144 16 -144 -32
WIRE 16 16 16 -32
WIRE -368 112 -368 64
WIRE -144 144 -144 96
WIRE 16 144 16 96
WIRE -368 224 -368 192
WIRE 16 240 -144 240
WIRE -144 288 -144 240
WIRE 16 288 16 240
WIRE -144 416 -144 368
WIRE 16 416 16 368
FLAG -368 224 0
FLAG -368 64 sin
FLAG -144 144 0
FLAG 16 144 0
FLAG -144 416 0
FLAG 16 416 0
SYMBOL voltage -368 96 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V1
SYMATTR Value SINE(0 5 50)
SYMBOL bi2 -144 16 R0
WINDOW 3 -9 169 Left 0
SYMATTR InstName B1
SYMATTR Value I=limit({lower_limit},v(sin),{upper_limit})
SYMBOL res 0 0 R0
SYMATTR InstName R_Load
SYMATTR Value 1
SYMBOL bi2 -144 288 R0
WINDOW 3 -29 163 Left 0
SYMATTR InstName B2
SYMATTR Value I=uramp(v(sin))
SYMBOL res 0 272 R0
SYMATTR InstName R_Load1
SYMATTR Value 1
TEXT -350 270 Left 0 !.tran 100m
TEXT 184 368 Left 0 ;positive values using function "uramp"
TEXT 120 -24 Left 0 !.params lower_limit = 0  upper_limit = 4.5
TEXT 200 64 Left 0 ;pos. halvwave using function "limit"\nupper_limut is below amplitude for demo
TEXT 352 224 Left 0 ;REF: HELP (F1) / LTspice / Circuit elements / B. Arbitrary