* Z:\home\khalils\Downloads\files\data\raw_asc\7b2d9c85b081_ck_osc.asc
* Generated by LTspice 26.0.1 for Windows.
* .ac dec 200 1M 10M
* .dc v_1 0 1.5
* Oscillator
* Amplitude\nregulator
* Output voltage\nregulator
* Output\namplifier
* M33 and M35 are in\nweak inversion zone
* M17 is in weak inversion zone,\nso acts as a very large resistor
* M1 is in grounded source config,\nso acts as a pierce oscillator
* M37 and M39 have\nhigh resistance, so\nthey are in weak\ninversion zone
* Ip
* IL
* this voltage-follower amplifier achieves a very small offset lVRl - IVNl for IL >> B*Ip
* Citations credit to Eric Vittoz:\n- [High-performance crystal oscillator circuits: theory and application](http://ieeexplore.ieee.org/document/318/)\n- [Low-Power Crystal and MEMS Oscillators: The Experience of Watch Developments](https://link.springer.com/10.1007/978-90-481-9395-0)
XM37 M39_S g_a M3_g V1 PM L=0.18u W=15u ;pnba D)G)S)B
XM25 M24_d M24_d V1 V1 PM L=0.18u W=10u ;pnba D)G)S)B
CL V1 M13_d 10p
C4 V1 M39_D 10p
XM5 g_b M39_D N003 V1 PM L=0.18u W=3u ;pnba D)G)S)B
V_1 V1 0 1.5
XM2 Q2 g_b 0 0 NM L=0.18u W=5u ;pnba D)G)S)B
XM17 M1_gate g_a Q2 V1 PM L=0.18u W=15u ;pnba D)G)S)B
XM4 M39_S g_b 0 0 NM L=0.18u W=5u ;pnba D)G)S)B
XM32 VN M32_g 0 0 NM L=0.18u W=20u ;pnba D)G)S)B
XM24 M24_d M32_g 0 0 NM L=0.18u W=5u ;pnba D)G)S)B
XM7 N002 N002 V1 V1 PM L=0.18u W=15u ;pnba D)G)S)B
C8 Q1 M14_g 10p
XM3 M39_S M3_g V1 V1 PM L=0.18u W=5u ;pnba D)G)S)B
XM21 M22_d M22_d V1 V1 PM L=0.18u W=15u ;pnba D)G)S)B
XM15 N001 N001 V1 V1 PM L=0.18u W=15u ;pnba D)G)S)B
C7 Q1 M3_g 10p
C6 Q1 M1_gate 10p
XM33 M32_g Vr M35_s V1 PM L=0.18u W=80u ;pnba D)G)S)B
C3 Q2 N005 3.3p
C15 V1 Vr 10p
XM22 M22_d M22_d Vr 0 NM L=0.18u W=5u ;pnba D)G)S)B
C2 V1 Q2 10p
C1 V1 Q1 10p
XM20 Vr g_b 0 0 NM L=0.18u W=5u ;pnba D)G)S)B
XM39 M39_D g_a M39_S V1 PM L=0.18u W=15u ;pnba D)G)S)B
XM19 g_a g_a N001 V1 PM L=0.18u W=15u ;pnba D)G)S)B
XM10 g_a g_b 0 0 NM L=0.18u W=5u ;pnba D)G)S)B
C11 V1 M3_g 10p
XM29 M35_s M22_d V1 V1 PM L=0.18u W=15u ;pnba D)G)S)B
C16 V1 VN 10p
XM6 g_b g_b 0 0 NM L=0.18u W=5u ;pnba D)G)S)B
XM12 M12_g M12_g VN 0 NM L=0.18u W=3u ;pnba D)G)S)B
R7 N003 V1 10
XM14 M13_d M14_g VN 0 NM L=0.18u W=200u ;pnba D)G)S)B
XM11 M12_g M12_g V1 V1 PM L=0.18u W=15u ;pnba D)G)S)B
R1 N004 Q1 20
XM8 g_a g_b 0 0 NM L=0.18u W=5u ;pnba D)G)S)B
L1 N005 N004 6.7m
XM35 0 VN M35_s V1 PM L=0.18u W=80u ;pnba D)G)S)B
XM1 Q2 M1_gate V1 V1 PM L=0.18u W=3u ;pnba D)G)S)B
C5 V1 M39_S 10p
XM23 M14_g VN M12_g V1 PM L=0.18u W=15u ;pnba D)G)S)B
XM13 M13_d M14_g V1 V1 PM L=0.18u W=600u ;pnba D)G)S)B
XM9 g_a g_a N002 V1 PM L=0.18u W=15u ;pnba D)G)S)B
XM27 M35_s M24_d V1 V1 PM L=0.18u W=20u ;pnba D)G)S)B
XM26 M32_g M32_g 0 0 NM L=0.18u W=10u ;pnba D)G)S)B
.op
.lib mosfet_018.lib
.tran 0 10 0 250n startup
.backanno
.end

* LTspice schematic (.asc):
Version 4
SHEET 1 5612 1000
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WIRE 1440 832 1296 832
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LINE Normal 1020 -492 1020 656 2
LINE Normal 2536 -468 2536 680 2
LINE Normal 4084 -456 4084 692 2
LINE Normal 3824 56 3824 140 2
LINE Normal 3824 140 3804 120 2
LINE Normal 3824 140 3844 120 2
LINE Normal 4196 268 4112 268 2
LINE Normal 4112 268 4132 248 2
LINE Normal 4112 268 4132 288 2
SYMBOL nmos4 2736 304 R0
WINDOW 3 58 29 Left 2
WINDOW 123 -140 117 Left 2
WINDOW 0 -55 49 Left 2
SYMATTR Value NM
SYMATTR Value2 L=0.18u W=5u
SYMATTR InstName M20
SYMATTR Prefix X
SYMBOL pmos4 224 192 R180
WINDOW 123 67 -6 Left 2
SYMATTR Value2 L=0.18u W=15u
SYMATTR InstName M19
SYMATTR Value PM
SYMATTR Prefix X
SYMBOL pmos4 2368 112 M180
WINDOW 123 -138 110 Left 2
SYMATTR Value2 L=0.18u W=3u
SYMATTR InstName M5
SYMATTR Value PM
SYMATTR Prefix X
SYMBOL pmos4 3424 -128 M180
WINDOW 123 -138 110 Left 2
SYMATTR Value2 L=0.18u W=20u
SYMATTR InstName M27
SYMATTR Value PM
SYMATTR Prefix X
SYMBOL nmos4 3216 432 M0
WINDOW 3 58 29 Left 2
WINDOW 123 114 106 Left 2
WINDOW 0 -20 112 Left 2
SYMATTR Value NM
SYMATTR Value2 L=0.18u W=5u
SYMATTR InstName M24
SYMATTR Prefix X
SYMBOL Ind 1312 816 R90
WINDOW 0 5 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName L1
SYMATTR Value 6.7m
SYMBOL cap 368 -288 M0
SYMATTR InstName C1
SYMATTR Value 10p
SYMBOL pmos4 1664 80 M270
WINDOW 123 20 107 VRight 2
WINDOW 0 -19 -29 VRight 2
WINDOW 3 -15 41 VRight 2
SYMATTR Value2 L=0.18u W=15u
SYMATTR InstName M37
SYMATTR Value PM
SYMATTR Prefix X
SYMBOL pmos4 4448 -96 M180
WINDOW 123 -138 110 Left 2
SYMATTR Value2 L=0.18u W=15u
SYMATTR InstName M11
SYMATTR Value PM
SYMATTR Prefix X
SYMBOL nmos4 3424 432 R0
WINDOW 3 58 70 Left 2
WINDOW 123 59 30 Left 2
WINDOW 0 -22 111 Left 2
SYMATTR Value NM
SYMATTR Value2 L=0.18u W=10u
SYMATTR InstName M26
SYMATTR Prefix X
SYMBOL nmos4 2736 48 R0
WINDOW 3 58 29 Left 2
WINDOW 123 -132 111 Left 2
WINDOW 0 56 71 Left 2
SYMATTR Value NM
SYMATTR Value2 L=0.18u W=5u
SYMATTR InstName M22
SYMATTR Prefix X
SYMBOL cap 1456 -256 R0
SYMATTR InstName C11
SYMATTR Value 10p
SYMBOL nmos4 5200 16 R0
WINDOW 3 58 29 Left 2
WINDOW 123 60 104 Left 2
WINDOW 0 56 71 Left 2
SYMATTR Value NM
SYMATTR Value2 L=0.18u W=200u
SYMATTR InstName M14
SYMATTR Prefix X
SYMBOL pmos4 3664 64 M180
WINDOW 123 -138 110 Left 2
SYMATTR Value2 L=0.18u W=15u
SYMATTR InstName M29
SYMATTR Value PM
SYMATTR Prefix X
SYMBOL cap 2976 -288 M0
SYMATTR InstName C15
SYMATTR Value 10p
SYMBOL Cap 1504 816 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C3
SYMATTR Value 3.3p
SYMBOL pmos4 5200 -96 M180
WINDOW 123 -175 107 Left 2
SYMATTR Value2 L=0.18u W=600u
SYMATTR InstName M13
SYMATTR Value PM
SYMATTR Prefix X
SYMBOL pmos4 1728 -48 M180
WINDOW 123 -138 110 Left 2
SYMATTR Value2 L=0.18u W=5u
SYMATTR InstName M3
SYMATTR Value PM
SYMATTR Prefix X
SYMBOL pmos4 576 80 R270
WINDOW 123 22 -182 VRight 2
WINDOW 0 -19 -29 VRight 2
WINDOW 3 -15 41 VRight 2
SYMATTR Value2 L=0.18u W=15u
SYMATTR InstName M17
SYMATTR Value PM
SYMATTR Prefix X
SYMBOL res 2432 -192 R180
WINDOW 0 36 76 Left 2
WINDOW 3 36 40 Left 2
SYMATTR InstName R7
SYMATTR Value 10
SYMBOL voltage 5456 432 R0
SYMATTR InstName V_1
SYMATTR Value 1.5
SYMBOL pmos4 3216 -128 R180
WINDOW 123 62 21 Left 2
WINDOW 0 64 142 Left 2
SYMATTR Value2 L=0.18u W=10u
SYMATTR InstName M25
SYMATTR Value PM
SYMATTR Prefix X
SYMBOL cap 1920 -288 R0
SYMATTR InstName C5
SYMATTR Value 10p
SYMBOL cap 4256 -288 M0
SYMATTR InstName C16
SYMATTR Value 10p
SYMBOL cap 1392 -256 M0
SYMATTR InstName C7
SYMATTR Value 10p
SYMBOL nmos4 224 432 M0
WINDOW 3 58 29 Left 2
WINDOW 123 131 71 Left 2
WINDOW 0 -21 115 Left 2
SYMATTR Value NM
SYMATTR Value2 L=0.18u W=5u
SYMATTR InstName M10
SYMATTR Prefix X
SYMBOL pmos4 4800 0 M270
WINDOW 123 -15 59 VLeft 2
WINDOW 0 74 26 VLeft 2
WINDOW 3 70 93 VLeft 2
SYMATTR Value2 L=0.18u W=15u
SYMATTR InstName M23
SYMATTR Value PM
SYMATTR Prefix X
SYMBOL pmos4 3424 304 M180
WINDOW 123 -138 110 Left 2
SYMATTR Value2 L=0.18u W=80u
SYMATTR InstName M33
SYMATTR Value PM
SYMATTR Prefix X
SYMBOL pmos4 2736 -64 M180
WINDOW 123 -138 110 Left 2
SYMATTR Value2 L=0.18u W=15u
SYMATTR InstName M21
SYMATTR Value PM
SYMATTR Prefix X
SYMBOL nmos4 3888 320 R0
WINDOW 3 57 65 Left 2
WINDOW 123 -150 116 Left 2
WINDOW 0 60 27 Left 2
SYMATTR Value NM
SYMATTR Value2 L=0.18u W=20u
SYMATTR InstName M32
SYMATTR Prefix X
SYMBOL cap 416 -144 R270
WINDOW 0 32 32 VTop 2
WINDOW 3 0 32 VBottom 2
SYMATTR InstName C6
SYMATTR Value 10p
SYMBOL nmos4 1824 432 M0
WINDOW 3 58 29 Left 2
WINDOW 123 -141 114 Left 2
WINDOW 0 56 71 Left 2
SYMATTR Value NM
SYMATTR Value2 L=0.18u W=5u
SYMATTR InstName M4
SYMATTR Prefix X
SYMBOL pmos4 768 -80 M180
WINDOW 123 -183 43 Left 2
SYMATTR Value2 L=0.18u W=3u
SYMATTR InstName M1
SYMATTR Value PM
SYMATTR Prefix X
SYMBOL cap 2208 -288 M0
SYMATTR InstName C4
SYMATTR Value 10p
SYMBOL nmos4 2368 432 R0
WINDOW 3 58 29 Left 2
WINDOW 123 -137 117 Left 2
WINDOW 0 56 71 Left 2
SYMATTR Value NM
SYMATTR Value2 L=0.18u W=5u
SYMATTR InstName M6
SYMATTR Prefix X
SYMBOL pmos4 1184 192 R180
WINDOW 123 -151 110 Left 2
SYMATTR Value2 L=0.18u W=15u
SYMATTR InstName M9
SYMATTR Value PM
SYMATTR Prefix X
SYMBOL cap 5392 -272 R0
SYMATTR InstName CL
SYMATTR Value 10p
SYMBOL nmos4 864 432 M0
WINDOW 3 58 29 Left 2
WINDOW 123 131 71 Left 2
WINDOW 0 56 71 Left 2
SYMATTR Value NM
SYMATTR Value2 L=0.18u W=5u
SYMATTR InstName M2
SYMATTR Prefix X
SYMBOL cap 4896 -208 R0
SYMATTR InstName C8
SYMATTR Value 10p
SYMBOL nmos4 1184 432 M0
WINDOW 3 58 29 Left 2
WINDOW 123 -139 112 Left 2
WINDOW 0 56 71 Left 2
SYMATTR Value NM
SYMATTR Value2 L=0.18u W=5u
SYMATTR InstName M8
SYMATTR Prefix X
SYMBOL pmos4 3760 304 R180
WINDOW 123 -153 117 Left 2
WINDOW 0 55 21 Left 2
SYMATTR Value2 L=0.18u W=80u
SYMATTR InstName M35
SYMATTR Value PM
SYMATTR Prefix X
SYMBOL Res 1104 816 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R1
SYMATTR Value 20
SYMBOL cap 976 -288 M0
SYMATTR InstName C2
SYMATTR Value 10p
SYMBOL pmos4 2128 80 M270
WINDOW 123 24 96 VRight 2
WINDOW 0 -19 -29 VRight 2
WINDOW 3 -15 41 VRight 2
SYMATTR Value2 L=0.18u W=15u
SYMATTR InstName M39
SYMATTR Value PM
SYMATTR Prefix X
SYMBOL pmos4 1184 0 R180
WINDOW 123 -149 113 Left 2
SYMATTR Value2 L=0.18u W=15u
SYMATTR InstName M7
SYMATTR Value PM
SYMATTR Prefix X
SYMBOL pmos4 224 -16 R180
WINDOW 123 131 32 Left 2
SYMATTR Value2 L=0.18u W=15u
SYMATTR InstName M15
SYMATTR Value PM
SYMATTR Prefix X
SYMBOL nmos4 4448 16 R0
WINDOW 3 58 29 Left 2
WINDOW 123 59 105 Left 2
WINDOW 0 56 71 Left 2
SYMATTR Value NM
SYMATTR Value2 L=0.18u W=3u
SYMATTR InstName M12
SYMATTR Prefix X
FLAG 352 -160 Q1
FLAG 960 32 Q2
FLAG 1376 -304 Q1
FLAG 2880 224 Vr
FLAG 4912 -288 Q1
FLAG 3712 688 0
FLAG 5456 592 0
FLAG 5568 -368 V1
FLAG 5568 224 VN
FLAG 5456 368 V1
FLAG 1584 240 g_a
FLAG 1344 384 g_b
FLAG 640 -160 M1_gate
FLAG 1776 32 M39_S
FLAG 2192 32 M39_D
FLAG 1520 -128 M3_g
FLAG 4368 96 M12_g
FLAG 5120 96 M14_g
FLAG 5408 -48 M13_d
FLAG 2864 -16 M22_d
FLAG 3808 400 M32_g
FLAG 3232 -80 M24_d
FLAG 3584 96 M35_s
FLAG 2864 96 0
FLAG 4576 64 0
FLAG 5328 64 0
FLAG 80 144 V1
FLAG 1072 144 V1
FLAG 1616 -16 V1
FLAG 2080 -16 V1
FLAG 2480 64 V1
FLAG 3648 256 V1
FLAG 3536 256 V1
FLAG 4752 -96 V1
FLAG 624 -16 V1
FLAG 848 832 Q1
FLAG 1664 832 Q2
TEXT 40 672 Left 2 ;.ac dec 200 1M 10M
TEXT 320 704 Left 2 !.op
TEXT 320 672 Left 2 !.lib mosfet_018.lib
TEXT 40 704 Left 2 ;.dc v_1 0 1.5
TEXT 472 -440 Left 5 ;Oscillator
TEXT 1656 -512 Left 5 ;Amplitude\nregulator
TEXT 3128 -512 Left 5 ;Output voltage\nregulator
TEXT 4768 -512 Left 5 ;Output\namplifier
TEXT 3488 136 Left 2 ;M33 and M35 are in\nweak inversion zone
TEXT 320 128 Left 2 ;M17 is in weak inversion zone,\nso acts as a very large resistor
TEXT 464 -256 Left 2 ;M1 is in grounded source config,\nso acts as a pierce oscillator
TEXT 1816 120 Left 2 ;M37 and M39 have\nhigh resistance, so\nthey are in weak\ninversion zone
TEXT 3856 96 Left 4 ;Ip
TEXT 4168 312 Right 4 ;IL
TEXT 4264 304 Left 2 ;this voltage-follower amplifier achieves a very small offset lVRl - IVNl for IL >> B*Ip
TEXT 320 744 Left 2 !.tran 0 10 0 250n startup
TEXT 1992 840 Left 3 ;Citations credit to Eric Vittoz:\n- [High-performance crystal oscillator circuits: theory and application](http://ieeexplore.ieee.org/document/318/)\n- [Low-Power Crystal and MEMS Oscillators: The Experience of Watch Developments](https://link.springer.com/10.1007/978-90-481-9395-0)