* SPICE netlist
R4 VHP N003 {R}
R7 N001 VHP {R} tol=1 pwr=0.1
R6 N002 VBP {R}
R5 N003 VBS {R}
C1 VBP N001 {C}
C2 VLP N002 {C}
Vin Vin 0 PULSE(-0.2 0.2 0 0.1u 0.1u 0.5m 1ms 10) AC 1
VCC VCC 0 10
VSS 0 VSS 10
XU1 0 N003 VCC VSS VHP tl082 ;pnba In+)In-)V+)V-)OUT
XU2 0 N001 VCC VSS VBP tl082 ;pnba In+)In-)V+)V-)OUT
XU3 0 N002 VCC VSS VLP tl082 ;pnba In+)In-)V+)V-)OUT
XU4 0 N004 VCC VSS VBS tl082 ;pnba In+)In-)V+)V-)OUT
RQ N004 VBP {RQ}
R9 VBS N004 {R}
R1 N003 VLP {R}
RH N004 Vin {RH}
;ac lin 1000 0.8k 1.2k
.inc tl082.cir
.param R=1.6k C=100n RQ=4.7k RH=R/1.0
.tran 0 10m 5m

* LTspice schematic (.asc)
Version 4
SHEET 1 1376 656
WIRE 688 -328 -368 -328
WIRE -128 -280 -160 -280
WIRE -32 -280 -64 -280
WIRE 16 -280 -32 -280
WIRE 144 -264 112 -264
WIRE 256 -264 208 -264
WIRE 288 -264 256 -264
WIRE -688 -248 -688 -280
WIRE -576 -248 -576 -280
WIRE 448 -248 432 -248
WIRE 560 -248 528 -248
WIRE 576 -248 560 -248
WIRE -688 -152 -688 -168
WIRE -576 -152 -576 -168
WIRE -368 -136 -368 -328
WIRE -304 -136 -368 -136
WIRE -160 -136 -160 -280
WIRE -160 -136 -224 -136
WIRE -128 -136 -160 -136
WIRE -32 -120 -32 -280
WIRE -32 -120 -64 -120
WIRE 16 -120 -32 -120
WIRE 112 -120 112 -264
WIRE 112 -120 96 -120
WIRE 160 -120 112 -120
WIRE -128 -104 -144 -104
WIRE 256 -104 256 -264
WIRE 256 -104 224 -104
WIRE 304 -104 256 -104
WIRE 432 -104 432 -248
WIRE 432 -104 384 -104
WIRE 480 -104 432 -104
WIRE 160 -88 144 -88
WIRE 560 -88 560 -248
WIRE 560 -88 544 -88
WIRE 688 -88 688 -328
WIRE 688 -88 560 -88
WIRE -144 -72 -144 -104
WIRE 480 -72 464 -72
WIRE 144 -56 144 -88
WIRE 464 -40 464 -72
WIRE -688 72 -688 40
WIRE 144 72 112 72
WIRE 256 72 224 72
WIRE 304 72 256 72
WIRE -688 168 -688 152
WIRE -32 216 -32 -120
WIRE 0 216 -32 216
WIRE 112 216 112 72
WIRE 112 216 80 216
WIRE 160 216 112 216
WIRE 256 232 256 72
WIRE 256 232 224 232
WIRE 320 232 256 232
WIRE 432 232 432 -104
WIRE 432 232 400 232
WIRE 160 248 144 248
WIRE 144 280 144 248
WIRE 0 328 -96 328
WIRE 112 328 112 216
WIRE 112 328 80 328
FLAG -144 -72 0
FLAG 144 -56 0
FLAG -576 -152 0
FLAG -688 -152 0
FLAG -96 -152 VCC
IOPIN 512 128 In
FLAG -96 -88 VSS
IOPIN 512 192 In
FLAG -96 328 Vin
IOPIN 512 608 In
FLAG 576 -248 VHP
IOPIN 1184 32 Out
FLAG 16 -280 VBP
IOPIN 624 0 Out
FLAG 288 -264 VLP
IOPIN 896 16 Out
FLAG -688 -280 VCC
IOPIN -80 0 Out
FLAG -576 -280 VSS
IOPIN 32 0 Out
FLAG -688 40 Vin
IOPIN -80 320 Out
FLAG -688 168 0
FLAG 192 264 VSS
IOPIN 800 544 In
FLAG 192 200 VCC
IOPIN 800 480 In
FLAG 464 -40 0
FLAG 144 280 0
FLAG 304 72 VBS
IOPIN 912 352 Out
FLAG 192 -136 VCC
IOPIN 800 144 In
FLAG 512 -120 VCC
IOPIN 1120 160 In
FLAG 192 -72 VSS
IOPIN 800 208 In
FLAG 512 -56 VSS
IOPIN 1120 224 In
SYMBOL res 544 -264 R90
SYMATTR InstName R4
SYMATTR Value {R}
SYMBOL res -208 -152 R90
SYMATTR InstName R7
SYMATTR Value {R}
SYMATTR SpiceLine tol=1 pwr=0.1
SYMBOL res 112 -136 R90
SYMATTR InstName R6
SYMATTR Value {R}
SYMBOL res 416 216 R90
SYMATTR InstName R5
SYMATTR Value {R}
SYMBOL cap -64 -296 R90
SYMATTR InstName C1
SYMATTR Value {C}
SYMBOL cap 208 -280 R90
SYMATTR InstName C2
SYMATTR Value {C}
SYMBOL voltage -688 56 R0
SYMATTR Value2 AC 1
SYMATTR InstName Vin
SYMATTR Value PULSE(-0.2 0.2 0 0.1u 0.1u 0.5m 1ms 10)
SYMBOL voltage -688 -264 R0
SYMATTR InstName VCC
SYMATTR Value 10
SYMBOL voltage -576 -152 R180
SYMATTR InstName VSS
SYMATTR Value 10
SYMBOL Opamps\\opamp2 512 -152 R0
SYMATTR InstName U1
SYMATTR Value tl082
SYMBOL Opamps\\opamp2 -96 -184 R0
SYMATTR Value tl082
SYMATTR InstName U2
SYMBOL Opamps\\opamp2 192 -168 R0
SYMATTR InstName U3
SYMATTR Value tl082
SYMBOL Opamps\\opamp2 192 168 R0
SYMATTR Value tl082
SYMATTR InstName U4
SYMBOL res 96 200 R90
SYMATTR InstName RQ
SYMATTR Value {RQ}
SYMBOL res 240 56 R90
SYMATTR InstName R9
SYMATTR Value {R}
SYMBOL res 400 -120 R90
SYMATTR InstName R1
SYMATTR Value {R}
SYMBOL res 96 312 R90
SYMATTR InstName RH
SYMATTR Value {RH}