Version 4
SHEET 1 880 680
WIRE 208 80 208 48
WIRE 208 176 208 160
WIRE 240 176 208 176
WIRE 304 176 304 48
WIRE 256 192 224 192
WIRE 240 240 240 176
WIRE 256 240 240 240
WIRE 224 256 224 192
WIRE 224 256 208 256
WIRE 208 272 208 256
WIRE 304 272 304 256
FLAG 208 48 1
FLAG 208 272 2
FLAG 304 48 3
FLAG 304 272 4
SYMBOL ind 192 64 R0
SYMATTR InstName L1
SYMATTR Value {LL}
SYMATTR SpiceLine Ipk=20m Rser=0 Rpar=100Meg Cpar=0
SYMBOL res 192 160 R0
SYMATTR InstName R1
SYMATTR Value {RR}
SYMBOL sw 304 160 R0
SYMATTR InstName S1
TEXT 448 -80 Left 2 !.param LL=63mH
TEXT 448 -56 Left 2 !.param RR=510
TEXT 448 -24 Left 2 !.param ION=7mA\n.param IOFF=2mA
TEXT 392 24 Left 2 !.param VTH=RR*(ION+IOFF)/2
TEXT 392 48 Left 2 !.param VHY=RR*(ION-IOFF)/2
TEXT 104 -32 Left 2 ;.model S1 SW(vt={VTH} vh={VHY})
TEXT 320 128 Left 2 !.model S1 SW(vt={VTH} vh={VHY})