* Z:\home\khalils\Downloads\files\data\raw_asc\2dc355ef7e89_74HC4046.asc
* Generated by LTspice 26.0.1 for Windows.
A1 SIG1 0 0 0 0 0 N001 0 BUF ref={vcc1/2}
A11 COMP1 0 0 0 0 0 N008 0 BUF ref={vcc1/2}
M1 PC2 N040 0 0 MHCNEN W=250u L=2.5u
M2 PC2 N033 VCC VCC MHCPEN W=500u L=2.4u
A3 N002 0 0 0 0 N003 0 0 BUF td={0.5*tdel1} tripdt={tripdt1}
A23 N006 0 0 0 0 0 N007 0 BUF td={tdel1} tripdt={tripdt1} ref=0.5 vhigh={vcc1}
A13 N009 0 0 0 0 N004 0 0 BUF td={0.5*tdel1} tripdt={tripdt1}
A14 N004 0 0 0 0 N023 0 0 BUF td={0.5*tdel1} tripdt={tripdt1}
A4 N003 0 0 0 0 N015 0 0 BUF td={0.5*tdel1} tripdt={tripdt1}
A39 N019 0 0 0 0 N020 0 0 BUF td={0.5*tdel1} tripdt={tripdt1}
A81 N026 0 0 0 0 N031 0 0 BUF td={tdel1} tripdt={tripdt1}
A82 N031 0 0 0 0 N032 0 0 BUF td={tdel1} tripdt={tripdt1} ref=0.5 Vhigh={vcc1}
A73 N034 0 0 0 0 N030 0 0 BUF td={0.5*tdel1} tripdt={tripdt1}
A72 N035 0 0 0 0 N034 0 0 BUF td={0.5*tdel1} tripdt={tripdt1}
A31 0 N010 0 N015 0 N011 0 0 AND td={tdel1} tripdt={tripdt1}
A32 0 N023 0 N019 0 N024 0 0 AND td={tdel1} tripdt={tripdt1}
A33 0 N011 0 N016 0 N017 0 0 AND td={tdel1} tripdt={tripdt1}
A35 0 N011 0 N017 0 N018 0 0 AND td={1.2*tdel1} tripdt={tripdt1}
A34 0 N017 0 N024 0 N016 0 0 AND td={tdel1} tripdt={tripdt1}
A36 0 N016 0 N024 0 N025 0 0 AND td={1.2*tdel1} tripdt={tripdt1}
A37 0 N018 0 N010 0 N019 0 0 AND td={tdel1} tripdt={tripdt1}
A38 0 N019 0 N025 0 N010 0 0 AND td={tdel1} tripdt={tripdt1}
A51 0 N015 0 N026 0 N027 0 0 AND td={tdel1} tripdt={tripdt1}
A52 0 N027 N030 N029 0 N026 0 0 AND td={tdel1} tripdt={tripdt1}
A53 0 N027 0 N028 0 N029 0 0 AND td={tdel1} tripdt={tripdt1}
A54 0 N029 0 N030 0 N028 0 0 AND td={tdel1} tripdt={tripdt1}
A61 0 N037 N030 N036 0 N038 0 0 AND td={tdel1} tripdt={tripdt1}
A64 0 N041 0 N036 0 N037 0 0 AND td={tdel1} tripdt={tripdt1}
A63 0 N030 0 N037 0 N041 0 0 AND td={tdel1} tripdt={tripdt1}
A62 0 N038 N023 0 0 N036 0 0 AND td={tdel1} tripdt={tripdt1}
A84 0 N026 0 N038 0 N043 0 0 AND td={tdel1} tripdt={tripdt1}
A71 N029 N027 0 N036 N037 N035 0 0 AND td={tdel1} tripdt={tripdt1}
A22 N005 0 0 0 0 N006 0 0 BUF td={tdel1} tripdt={tripdt1}
A2 N001 0 0 0 0 N002 0 0 BUF td={0.5*tdel1} tripdt={tripdt1}
A12 N008 0 0 0 0 N009 0 0 BUF td={0.5*tdel1} tripdt={tripdt1}
A41 N021 0 0 0 0 0 N022 0 BUF td={tdel1} tripdt={tripdt1} ref=0.5 vhigh={vcc1}
A86 N044 0 0 0 0 0 N045 0 BUF td={tdel1} tripdt={tripdt1} ref=0.5 vhigh={vcc1}
A85 N043 0 0 0 0 N044 0 0 BUF td={0.5*tdel1} tripdt={tripdt1}
A83 N038 0 0 0 0 N039 0 0 BUF td={2*tdel1} tripdt={tripdt1} ref=0.5 Vhigh={vcc1}
A18 nf 0 0 0 0 0 N014 0 MODULATOR mark={fmax} space={fmin}
A19 N014 0 0 0 0 0 N013 0 BUF ref=0 Vhigh={vcc1} vlow=0 td={tdel1} tripdt={tripdt1}
R10 N032 N033 1k
C6 VCC N033 10p
R11 N039 N040 1k
C7 N040 0 10p
A21 0 N003 0 N004 0 N005 0 0 XOR td={tdel1} tripdt={tripdt1}
A40 N020 0 0 0 0 N021 0 0 BUF td={0.5*tdel1} tripdt={tripdt1}
B1 nf 0 V=Table(V(VCOin), 0,0, 0.9, 0, {vcc1-0.9}, 1)
R7 VCOin 0 1G
R13 VCOout N012 100
A5 0 N013 0 INH 0 0 N012 0 OR ref={vcc1/2} Vhigh={vcc1} vlow=0
R4 INH 0 1G
R3 C1A 0 1G
R9 R2 0 1G
R15 R1 0 1G
R17 C1B 0 1G
B2 SIG1 0 V=V(vcch,0)*(1-tanh(v(sig,vcch)))
B3 VCCH 0 V=0.5*V(vcc,0)
R23 SIG SIG1 1e6
B4 COMP1 0 V=V(vcch,0)*(1-tanh(v(comp,vcch)))
R24 COMP COMP1 1e6
R5 N007 PC1 100
R6 N022 PC3 100
R8 N045 PCP 100
B5 N042 0 V=limit(0,V(vcoin,0),{vcc1-2})
R12 N042 DEMout 50
.model NMOS NMOS
.model PMOS PMOS
.lib C:\users\khalils\AppData\Local\LTspice\lib\cmp\standard.mos
************************************************
* NOMINAL N-Channel Transistor *
* UCB-3 Parameter Set *
* HIGH-SPEED CMOS Logic Family *
* 10-Jan.-1995 *
************************************************
.Model MHCNEN NMOS (
+LEVEL = 3
+KP = 45.3E-6
+VTO = 0.72
+TOX = 51.5E-9
+NSUB = 2.8E15
+GAMMA = 0.94e-6
+PHI = 0.65
+VMAX = 150E3
+RS = 40
+RD = 40
+XJ = 0.11E-6
+LD = 0.52E-6
+DELTA = 0.315
+THETA = 0.054
+ETA = 0.025
+KAPPA = 0.0
+WD = 0.0 )
***********************************************
* NOMINAL P-Channel transistor *
* UCB-3 Parameter Set *
* HIGH-SPEED CMOS Logic Family *
* 10-Jan.-1995 *
***********************************************
.Model MHCPEN PMOS (
+LEVEL = 3
+KP = 22.1E-6
+VTO = -0.71
+TOX = 51.5E-9
+NSUB = 3.3E16
+GAMMA = 0.92e-6
+PHI = 0.65
+VMAX = 970E3
+RS = 80
+RD = 80
+XJ = 0.63E-6
+LD = 0.23E-6
+DELTA = 2.24
+THETA = 0.108
+ETA = 0.322
+KAPPA = 0.0
+WD = 0.0 )
* VCC/2
* Buffered VCOin
* x_delay
* x_delay
* x_delay
* x_delay
* "x_delay" means this gate required a different delay\nto solve a self oscillation problem caused by the feedback.
.backanno
.end

* LTspice schematic (.asc):
Version 4
SHEET 1 2124 1976
WIRE -528 64 -592 64
WIRE -368 64 -464 64
WIRE -256 64 -304 64
WIRE -144 64 -192 64
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WIRE 288 1232 128 1232
WIRE -320 1248 -320 1216
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WIRE 256 1248 128 1248
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WIRE 512 1248 512 1152
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WIRE 656 1248 656 1024
WIRE 656 1248 512 1248
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WIRE 848 1264 704 1264
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FLAG 1376 384 PC3
IOPIN 1376 384 Out
FLAG 1264 720 VCC
IOPIN 1264 720 In
FLAG 1264 960 PC2
IOPIN 1264 960 Out
FLAG 1376 1296 PCP
IOPIN 1376 1296 Out
FLAG -592 64 SIG1
FLAG -592 160 COMP1
FLAG 1376 96 PC1
IOPIN 1376 96 Out
FLAG -432 608 nf
FLAG -560 768 0
FLAG -608 880 VCOin
IOPIN -608 880 In
FLAG -608 320 VCOout
IOPIN -608 320 Out
FLAG -576 560 0
FLAG -608 448 INH
IOPIN -608 448 In
FLAG -608 1216 C1A
IOPIN -608 1216 In
FLAG -448 1216 0
FLAG -608 1104 R2
IOPIN -608 1104 In
FLAG -448 1104 0
FLAG -608 992 R1
IOPIN -608 992 In
FLAG -448 992 0
FLAG -448 880 0
FLAG -608 1328 C1B
IOPIN -608 1328 In
FLAG -448 1328 0
FLAG -160 704 0
FLAG -48 560 VCCH
FLAG -128 992 0
FLAG -320 880 SIG
IOPIN -320 880 In
FLAG -64 880 SIG1
FLAG -128 1168 0
FLAG -288 1056 COMP
IOPIN -288 1056 In
FLAG -64 1056 COMP1
FLAG 1264 1184 0
FLAG 1376 240 VSS
IOPIN 1376 240 Out
FLAG 1184 240 0
FLAG -320 1328 0
FLAG -144 1216 DEMout
IOPIN -144 1216 Out
SYMBOL Digital\\buf1 -528 0 R0
WINDOW 3 21 90 Left 0
SYMATTR Value ref={vcc1/2}
SYMATTR InstName A1
SYMBOL Digital\\buf1 -528 96 R0
WINDOW 3 19 87 Left 0
SYMATTR Value ref={vcc1/2}
SYMATTR InstName A11
SYMBOL nmos 1120 1008 R0
SYMATTR InstName M1
SYMATTR Value MHCNEN
SYMATTR Value2 W=250u L=2.5u
SYMBOL pmos 1120 912 M180
SYMATTR InstName M2
SYMATTR Value MHCPEN
SYMATTR Value2 W=500u L=2.4u
SYMBOL Digital\\inv -256 0 R0
WINDOW 3 -52 103 Invisible 0
SYMATTR Value td={0.5*tdel1} tripdt={tripdt1}
SYMATTR InstName A3
SYMBOL Digital\\buf1 1152 32 R0
WINDOW 3 -47 95 Invisible 0
WINDOW 39 -74 110 Left 0
SYMATTR Value td={tdel1} tripdt={tripdt1}
SYMATTR SpiceLine vhigh={vcc1}
SYMATTR InstName A23
SYMATTR Value2 ref=0.5
SYMBOL Digital\\inv -256 96 R0
WINDOW 3 -52 103 Invisible 0
SYMATTR Value td={0.5*tdel1} tripdt={tripdt1}
SYMATTR InstName A13
SYMBOL Digital\\inv -64 384 R0
WINDOW 3 -52 103 Invisible 0
SYMATTR Value td={0.5*tdel1} tripdt={tripdt1}
SYMATTR InstName A14
SYMBOL Digital\\inv -64 288 R0
WINDOW 3 -52 103 Invisible 0
SYMATTR Value td={0.5*tdel1} tripdt={tripdt1}
SYMATTR InstName A4
SYMBOL Digital\\inv 960 320 R0
WINDOW 3 -52 103 Invisible 0
SYMATTR Value td={0.5*tdel1} tripdt={tripdt1}
SYMATTR InstName A39
SYMBOL Digital\\inv 768 768 R0
WINDOW 3 -52 103 Invisible 0
SYMATTR Value td={tdel1} tripdt={tripdt1}
SYMATTR InstName A81
SYMBOL Digital\\inv 864 768 R0
WINDOW 3 -52 103 Invisible 0
SYMATTR Value td={tdel1} tripdt={tripdt1}
SYMATTR InstName A82
SYMATTR Value2 ref=0.5
SYMATTR SpiceLine Vhigh={vcc1}
SYMBOL Digital\\inv 224 944 M0
WINDOW 3 -52 103 Invisible 0
SYMATTR Value td={0.5*tdel1} tripdt={tripdt1}
SYMATTR InstName A73
SYMBOL Digital\\inv 336 944 M0
WINDOW 3 -52 103 Invisible 0
SYMATTR Value td={0.5*tdel1} tripdt={tripdt1}
SYMATTR InstName A72
SYMBOL Digital\\and 192 272 R0
WINDOW 3 16 52 Invisible 0
SYMATTR Value td={tdel1} tripdt={tripdt1}
SYMATTR InstName A31
SYMBOL Digital\\and 192 400 R0
WINDOW 3 16 52 Invisible 0
SYMATTR Value td={tdel1} tripdt={tripdt1}
SYMATTR InstName A32
SYMBOL Digital\\and 400 272 R0
WINDOW 3 16 52 Invisible 0
SYMATTR Value td={tdel1} tripdt={tripdt1}
SYMATTR InstName A33
SYMBOL Digital\\and 576 272 R0
WINDOW 3 16 52 Invisible 0
SYMATTR Value td={1.2*tdel1} tripdt={tripdt1}
SYMATTR InstName A35
SYMBOL Digital\\and 400 400 R0
WINDOW 3 16 52 Invisible 0
SYMATTR Value td={tdel1} tripdt={tripdt1}
SYMATTR InstName A34
SYMBOL Digital\\and 576 432 R0
WINDOW 3 16 52 Invisible 0
SYMATTR Value td={1.2*tdel1} tripdt={tripdt1}
SYMATTR InstName A36
SYMBOL Digital\\and 736 304 R0
WINDOW 3 16 52 Invisible 0
SYMATTR Value td={tdel1} tripdt={tripdt1}
SYMATTR InstName A37
SYMBOL Digital\\and 736 432 R0
WINDOW 3 16 52 Invisible 0
SYMATTR Value td={tdel1} tripdt={tripdt1}
SYMATTR InstName A38
SYMBOL Digital\\and 192 640 R0
WINDOW 3 16 52 Invisible 0
SYMATTR Value td={tdel1} tripdt={tripdt1}
SYMATTR InstName A51
SYMBOL Digital\\and 192 768 R0
WINDOW 3 16 52 Invisible 0
SYMATTR Value td={tdel1} tripdt={tripdt1}
SYMATTR InstName A52
SYMBOL Digital\\and 416 720 R0
WINDOW 3 16 52 Invisible 0
SYMATTR Value td={tdel1} tripdt={tripdt1}
SYMATTR InstName A53
SYMBOL Digital\\and 416 848 R0
WINDOW 3 16 52 Invisible 0
SYMATTR Value td={tdel1} tripdt={tripdt1}
SYMATTR InstName A54
SYMBOL Digital\\and 192 1120 R0
WINDOW 3 16 52 Invisible 0
SYMATTR Value td={tdel1} tripdt={tripdt1}
SYMATTR InstName A61
SYMBOL Digital\\and 416 1168 R0
WINDOW 3 16 52 Invisible 0
SYMATTR Value td={tdel1} tripdt={tripdt1}
SYMATTR InstName A64
SYMBOL Digital\\and 416 1040 R0
WINDOW 3 16 52 Invisible 0
SYMATTR Value td={tdel1} tripdt={tripdt1}
SYMATTR InstName A63
SYMBOL Digital\\and 192 1248 R0
WINDOW 3 16 52 Invisible 0
SYMATTR Value td={tdel1} tripdt={tripdt1}
SYMATTR InstName A62
SYMBOL Digital\\and 880 1216 R0
WINDOW 3 16 52 Invisible 0
SYMATTR Value td={tdel1} tripdt={tripdt1}
SYMATTR InstName A84
SYMBOL Digital\\and 592 928 M0
WINDOW 3 16 52 Invisible 0
SYMATTR Value td={tdel1} tripdt={tripdt1}
SYMATTR InstName A71
SYMBOL Digital\\inv 1056 32 R0
WINDOW 3 -52 103 Invisible 0
SYMATTR Value td={tdel1} tripdt={tripdt1}
SYMATTR InstName A22
SYMBOL Digital\\inv -368 0 R0
WINDOW 3 -52 103 Invisible 0
SYMATTR Value td={0.5*tdel1} tripdt={tripdt1}
SYMATTR InstName A2
SYMBOL Digital\\inv -368 96 R0
WINDOW 3 -52 103 Invisible 0
SYMATTR Value td={0.5*tdel1} tripdt={tripdt1}
SYMATTR InstName A12
SYMBOL Digital\\buf1 1152 320 R0
WINDOW 3 -47 95 Invisible 0
WINDOW 39 -87 108 Left 0
SYMATTR Value td={tdel1} tripdt={tripdt1}
SYMATTR SpiceLine vhigh={vcc1}
SYMATTR InstName A41
SYMATTR Value2 ref=0.5
SYMBOL Digital\\buf1 1136 1232 R0
WINDOW 3 -47 95 Invisible 0
WINDOW 39 -63 111 Left 0
SYMATTR Value td={tdel1} tripdt={tripdt1}
SYMATTR SpiceLine vhigh={vcc1}
SYMATTR InstName A86
SYMATTR Value2 ref=0.5
SYMBOL Digital\\inv 1024 1232 R0
WINDOW 3 -52 103 Invisible 0
SYMATTR Value td={0.5*tdel1} tripdt={tripdt1}
SYMATTR InstName A85
SYMBOL Digital\\inv 864 1024 R0
WINDOW 3 -52 103 Invisible 0
SYMATTR Value td={2*tdel1} tripdt={tripdt1}
SYMATTR InstName A83
SYMATTR Value2 ref=0.5
SYMATTR SpiceLine Vhigh={vcc1}
SYMBOL SpecialFunctions\\modulate -400 608 R0
WINDOW 3 -98 114 Left 0
SYMATTR Value mark={fmax} space={fmin}
SYMATTR InstName A18
SYMBOL Digital\\buf1 -256 256 M0
WINDOW 3 -24 -6 Left 0
SYMATTR Value ref=0 Vhigh={vcc1} vlow=0
SYMATTR InstName A19
SYMATTR Value2 td={tdel1} tripdt={tripdt1}
SYMBOL res 976 848 R270
WINDOW 0 32 56 VTop 0
WINDOW 3 0 56 VBottom 0
SYMATTR InstName R10
SYMATTR Value 1k
SYMBOL cap 1072 736 R0
WINDOW 3 24 57 Left 0
SYMATTR Value 10p
SYMATTR InstName C6
SYMBOL res 976 1104 R270
WINDOW 0 32 56 VTop 0
WINDOW 3 0 56 VBottom 0
SYMATTR InstName R11
SYMATTR Value 1k
SYMBOL cap 1072 1104 R0
WINDOW 3 24 57 Left 0
SYMATTR Value 10p
SYMATTR InstName C7
SYMBOL Digital\\xor 608 16 R0
WINDOW 3 16 52 Invisible 0
SYMATTR Value td={tdel1} tripdt={tripdt1}
SYMATTR InstName A21
SYMBOL Digital\\inv 1056 320 R0
WINDOW 3 -52 103 Invisible 0
SYMATTR Value td={0.5*tdel1} tripdt={tripdt1}
SYMATTR InstName A40
SYMBOL bv -560 656 R0
WINDOW 3 31 120 Left 0
SYMATTR Value V=Table(V(VCOin), 0,0, 0.9, 0, {vcc1-0.9}, 1)
SYMATTR InstName B1
SYMBOL res -576 896 R270
WINDOW 0 32 56 VTop 0
WINDOW 3 0 56 VBottom 0
SYMATTR InstName R7
SYMATTR Value 1G
SYMBOL res -560 336 R270
WINDOW 0 32 56 VTop 0
WINDOW 3 0 56 VBottom 0
SYMATTR InstName R13
SYMATTR Value 100
SYMBOL Digital\\or -400 272 M0
WINDOW 3 -94 126 Left 0
SYMATTR Value ref={vcc1/2} Vhigh={vcc1} vlow=0
SYMATTR InstName A5
SYMBOL res -592 448 R0
SYMATTR InstName R4
SYMATTR Value 1G
SYMBOL res -576 1232 R270
WINDOW 0 32 56 VTop 0
WINDOW 3 0 56 VBottom 0
SYMATTR InstName R3
SYMATTR Value 1G
SYMBOL res -576 1120 R270
WINDOW 0 32 56 VTop 0
WINDOW 3 0 56 VBottom 0
SYMATTR InstName R9
SYMATTR Value 1G
SYMBOL res -576 1008 R270
WINDOW 0 32 56 VTop 0
WINDOW 3 0 56 VBottom 0
SYMATTR InstName R15
SYMATTR Value 1G
SYMBOL res -576 1344 R270
WINDOW 0 32 56 VTop 0
WINDOW 3 0 56 VBottom 0
SYMATTR InstName R17
SYMATTR Value 1G
SYMBOL bv -128 896 R0
WINDOW 3 -239 -54 Left 0
SYMATTR Value V=V(vcch,0)*(1-tanh(v(sig,vcch)))
SYMATTR InstName B2
SYMBOL bv -160 576 R0
SYMATTR InstName B3
SYMATTR Value V=0.5*V(vcc,0)
SYMBOL res -272 896 R270
WINDOW 0 15 -8 VTop 0
WINDOW 3 44 120 VBottom 0
SYMATTR InstName R23
SYMATTR Value 1e6
SYMBOL bv -128 1072 R0
WINDOW 3 -260 -53 Left 0
SYMATTR Value V=V(vcch,0)*(1-tanh(v(comp,vcch)))
SYMATTR InstName B4
SYMBOL res -256 1072 R270
WINDOW 0 16 0 VTop 0
WINDOW 3 43 126 VBottom 0
SYMATTR InstName R24
SYMATTR Value 1e6
SYMBOL res 1232 112 R270
WINDOW 0 32 56 VTop 0
WINDOW 3 0 56 VBottom 0
SYMATTR InstName R5
SYMATTR Value 100
SYMBOL res 1216 400 R270
WINDOW 0 32 56 VTop 0
WINDOW 3 0 56 VBottom 0
SYMATTR InstName R6
SYMATTR Value 100
SYMBOL res 1216 1312 R270
WINDOW 0 32 56 VTop 0
WINDOW 3 0 56 VBottom 0
SYMATTR InstName R8
SYMATTR Value 100
SYMBOL bv -320 1232 R0
WINDOW 3 39 86 Left 0
SYMATTR Value V=limit(0,V(vcoin,0),{vcc1-2})
SYMATTR InstName B5
SYMBOL res -288 1232 R270
WINDOW 0 18 -7 VTop 0
WINDOW 3 41 104 VBottom 0
SYMATTR InstName R12
SYMATTR Value 50
TEXT 1480 24 Left 0 !************************************************\n*         NOMINAL N-Channel Transistor         *\n*            UCB-3 Parameter Set               *\n*         HIGH-SPEED CMOS Logic Family         *\n*                10-Jan.-1995                  *\n************************************************\n.Model MHCNEN NMOS (\n+LEVEL = 3\n+KP    = 45.3E-6\n+VTO   = 0.72\n+TOX   = 51.5E-9\n+NSUB  = 2.8E15\n+GAMMA = 0.94e-6\n+PHI   = 0.65\n+VMAX  = 150E3\n+RS    = 40\n+RD    = 40\n+XJ    = 0.11E-6\n+LD    = 0.52E-6\n+DELTA = 0.315\n+THETA = 0.054\n+ETA   = 0.025\n+KAPPA = 0.0\n+WD    = 0.0 )\n \n***********************************************\n*        NOMINAL P-Channel transistor         *\n*           UCB-3 Parameter Set               *\n*         HIGH-SPEED CMOS Logic Family        *\n*               10-Jan.-1995                  *\n***********************************************\n.Model MHCPEN PMOS (\n+LEVEL = 3\n+KP    = 22.1E-6\n+VTO   = -0.71\n+TOX   = 51.5E-9\n+NSUB  = 3.3E16\n+GAMMA = 0.92e-6\n+PHI   = 0.65\n+VMAX  = 970E3\n+RS    = 80\n+RD    = 80\n+XJ    = 0.63E-6\n+LD    = 0.23E-6\n+DELTA = 2.24\n+THETA = 0.108\n+ETA   = 0.322\n+KAPPA = 0.0\n+WD    = 0.0 )
TEXT -56 616 Left 0 ;VCC/2
TEXT -216 1272 Left 0 ;Buffered VCOin
TEXT 528 272 Left 0 ;x_delay
TEXT 528 424 Left 0 ;x_delay
TEXT 160 1048 Left 0 ;x_delay
TEXT 272 1048 Left 0 ;x_delay
TEXT 328 608 Left 0 ;"x_delay" means this gate required a different delay\nto solve a self oscillation problem caused by the feedback.