Version 4
SHEET 1 1320 680
WIRE 656 48 656 32
WIRE 672 48 656 48
WIRE 1040 48 1040 32
WIRE 1056 48 1040 48
WIRE 576 64 576 32
WIRE 656 64 656 48
WIRE 656 64 624 64
WIRE 960 64 960 32
WIRE 1040 64 1040 48
WIRE 1040 64 1008 64
WIRE 144 112 48 112
WIRE 288 112 224 112
WIRE 320 112 288 112
WIRE 432 112 320 112
WIRE 560 112 512 112
WIRE 704 112 640 112
WIRE 944 112 704 112
WIRE 1088 112 1024 112
WIRE -160 128 -224 128
WIRE 48 128 48 112
WIRE 288 144 288 112
WIRE 704 144 704 112
WIRE -160 224 -160 208
WIRE 48 224 48 208
WIRE 288 224 288 208
WIRE 704 224 704 208
WIRE 1088 224 1088 192
FLAG 48 224 0
FLAG 288 224 0
FLAG 672 48 0
FLAG 704 224 0
FLAG 1056 48 0
FLAG 1088 224 0
FLAG -160 224 0
FLAG -224 128 calc
FLAG 320 112 sim
SYMBOL voltage 48 112 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V1
SYMATTR Value {U0}
SYMBOL res 240 96 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R1
SYMATTR Value {R}
SYMBOL cap 272 144 R0
SYMATTR InstName C1
SYMATTR Value {Cbuf}
SYMATTR SpiceLine Lser=400p
SYMBOL sw 656 112 R90
SYMATTR InstName S1
SYMATTR Value mySW
SYMBOL voltage 560 32 R270
WINDOW 0 32 56 VTop 2
WINDOW 3 96 -5 VBottom 2
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V2
SYMATTR Value PULSE(0 1 {1/(2*fs)} 1n 1n {1/(2*fs)} {1/fs})
SYMBOL cap 688 144 R0
SYMATTR InstName C2
SYMATTR Value {Cint}
SYMBOL sw 1040 112 R90
SYMATTR InstName S2
SYMATTR Value mySW
SYMBOL voltage 944 32 R270
WINDOW 0 32 56 VTop 2
WINDOW 3 93 104 VBottom 2
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V3
SYMATTR Value PULSE(1 0 {1/(2*fs)} 1n 1n {1/(2*fs)} {1/fs})
SYMBOL res 1072 96 R0
SYMATTR InstName R2
SYMATTR Value 0.1
SYMBOL bv -160 112 R0
SYMATTR InstName B1
SYMATTR Value V={CalcV}
SYMBOL ind 528 96 R90
WINDOW 0 5 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName L1
SYMATTR Value 10n
SYMATTR SpiceLine Rser=0.4
TEXT 344 264 Left 2 !.model mySW SW(Ron = 1k, Roff = 10Meg, Vt = 0.5)
TEXT 32 312 Left 2 !.param fs 200k
TEXT 32 344 Left 2 !.param R 1k
TEXT 248 352 Left 2 !.tran 20m
TEXT 32 376 Left 2 !.param Cbuf 10u
TEXT 32 408 Left 2 !.param Cint 20p
TEXT 32 440 Left 2 !.param CalcV { U0 - Cint * U0 *fs * R}
TEXT 32 280 Left 2 !.param U0 5