Open Loop Gain. We test the Open Loop Gain of a CMOS amplifier of Example 3-1. The gain is 30. Experiment 11-11.

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Presentation transcript:

Open Loop Gain

We test the Open Loop Gain of a CMOS amplifier of Example 3-1. The gain is 30. Experiment 11-11

.protect.lib 'c:\mm0355v.l' TT.unprotect.op.options nomod post VDD103.3v.paramW1=10u W2=10u W3=10u W4=10u M nch L=0.35u W='W1' m=1AD='0.95u*W1' +PD='2*(0.95u+W1)' AS='0.95u*W1' PS='2*(0.95u+W1)' M pch L=0.35u +W='W2' m=1AD='0.95u*W2' PD='2*(0.95u+W2)' +AS='0.95u*W2' PS='2*(0.95u+W2)' M pch L=0.35u +W='W3' m=1AD='0.95u*W3' PD='2*(0.95u+W3)' +AS='0.95u*W3' PS='2*(0.95u+W3)' M nch L=0.35u +W='W4' m=1AD='0.95u*W4' PD='2*(0.95u+W4)' +AS='0.95u*W4' PS='2*(0.95u+W4)' VGS1360.7v VGS4500.7v Vin60sin(0v 0.01v 10Meg).tran0.1ns600ns.end Vin VGS1=0.7V VGS4=0.7V

Experiment We test the Open Loop Gain of a CMOS amplifier of Example 4-1.

Example 4.1 DIFFERENTIAL AMPLIFIER.PROTECT.LIB "C:\mm0355v.l" TT.UNPROTECT VDDVDD! 0 1.5V VSSVSS! V MQ12 Vi+ 3 VSS! NCHW=10U L=2U MQ2Vo+ Vi- 3 VSS! NCHW=10U L=2U MQ32 2 VDD! VDD! PCHW=7U L=2U MQ4Vo+ 2 VDD! VDD! PCHW=7U L=2U MQ53 3 VSS! VSS! NCHW=100U L=2U.OP Vin1Vi+0AC1.ACDEC k Vin2Vi-00v.PLOTACVDB(Vo+).END

Experiment We test the Open Loop Gain of a CMOS amplifier of Example 5-6. The gain is 3000.

Classic Two-Stage OP AMP *********************************.PROTECT.OPTION POST.LIB 'c:\mm0355v.l' TT.UNPROTECT VDDVDD! 0DC 1.5V VSSVSS! 0DC -1.5V.GLOBAL VDD! VSS! ******************************************************* M11 V- 3VSS! NCHW=10UL=2U M22 V+ 3VSS! NCHW=10UL=2U M3VDD! 1 1VDD! PCHW=3UL=2U M4VDD! 1 2VDD! PCHW=3UL=2U M53 VB VSS!VSS! NCHW=30UL=2U M66 2 VOVDD! PCHW=4UL=3U M7VO VB2 VSS!VSS! NCHW=14UL=2U VBIAS5VB VBIAS7VB ******************************************************* Rm6VDD!60 *VDS6VDD!VO0V.OP *** Transient Simulation *** Vin1V-0AC1.ACDEC k Vin2V+00v.PLOTACVDB(Vo).END

Experiment We test the Open Loop Gain of a CMOS amplifier of Example The gain was found to be 3000.

Ex 6-20.protect.lib 'c:\mm0355v.l' TT.unprotect.op.options nomod post VDD105V Rm2voutvout_10 Rm111_10.paramW1=10u W2=20u W3=30u W4=30u M4321_11 +pch L=1u W='W4' m=1 +AD='0.95u*W4' PD='2*(0.95u+W4)' +AS='0.95u*W4' PS='2*(0.95u+W4)' M3vout431 +pch L=0.5u W='W3' m=1 +AD='0.95u*W3' PD='2*(0.95u+W3)' +AS='0.95u*W3' PS='2*(0.95u+W3)' M2vout_1670 +nch L=0.5u W='W2' m=1 +AD='0.95u*W2' PD='2*(0.95u+W2)' +AS='0.95u*W2' PS='2*(0.95u+W2)' M nch L=1u W='W1' m=1 +AD='0.95u*W1' PD='2*(0.95u+W1)' +AS='0.95u*W1' PS='2*(0.95u+W1)' Vin90AC1.ACDEC k VG V VG2601.8V VG3403V VG4204V *.tf v(vout) vin *.tran 0.1us 600us.plotVDB(vout_1).end

Experiment We test the Open Loop Gain of a CMOS amplifier of Example 6-1. The gain was found to be 22.

A typical and simple common gate amplifier is shown below:

Example 6-1.protect.lib 'c:\mm0355v.l' TT.unprotect.op.options nomod post VDD103.3V RL111100k.paramW1=5u M nch L=0.35u W='W1' m=1 +AD='0.95u*W1' PD='2*(0.95u+W1)' +AS='0.95u*W1' PS='2*(0.95u+W1)' VG200.65v Vin130AC1.ACDEC k.PLOTACVDB(11).END

Experiment We test the Open Loop Gain of a CMOS amplifier of Example 6-27.

The gain is about 817k.

Ex 6-20.protect.lib 'c:\mm0355v.l' TT.unprotect.op.options nomod post VDD105V Rm2voutvout_10 Rm111_10.paramW1=10u W2=20u W3=30u W4=30u M4321_11 +pch L=1u W='W4' m=1 +AD='0.95u*W4' PD='2*(0.95u+W4)' +AS='0.95u*W4' PS='2*(0.95u+W4)' M3vout431 +pch L=0.5u W='W3' m=1 +AD='0.95u*W3' PD='2*(0.95u+W3)' +AS='0.95u*W3' PS='2*(0.95u+W3)' M2vout_1670 +nch L=0.5u W='W2' m=1 +AD='0.95u*W2' PD='2*(0.95u+W2)' +AS='0.95u*W2' PS='2*(0.95u+W2)' M nch L=1u W='W1' m=1 +AD='0.95u*W1' PD='2*(0.95u+W1)' +AS='0.95u*W1' PS='2*(0.95u+W1)' Vin90AC1.ACDEC k VG V VG2601.8V VG3403V VG4204V *.tf v(vout) vin *.tran 0.1us 600us.plotVDB(vout_1).end

Experiment We test the Open Loop Gain of a CMOS amplifier of Example 8-1. The gain is found to be

A High Gain Differential Amplifier M1=(10u/2u)*3 M2=(10u/2u)*3 M3 =(100u/2u)*7 M4 =(10u/2u)* M5 =(10u/2u)* M6 =(10u/2u)* M7 =(10u/2u)* M8 =(10u/2u)*3 M9 =(10u/2u)*3 M10 =(10u/2u)*3 M11 =(10u/2u)*3

Test 1 *********************************.PROTECT.OPTION POST.LIB 'c:\mm0355v.l' TT.UNPROTECT.op VDDVDD! 01.5V VSSVSS! 0-1.5V.GLOBAL VDD! VSS! ******************************************************* M15 Vi+ 66 PCHW=10UL=2U m=3 M24 Vi- 66 PCHW=10UL=2U m=3 M36 VB3 VDD!VDD! PCHW=100UL=2U m=7 M45 VB45 VSS!VSS! NCHW=10UL=2U M54 VB45 VSS!VSS! NCHW=10UL=2U M63 VB67 5VSS! NCHW=10UL=2U M7Vo+ VB67 4VSS! NCHW=10UL=2U M PCHW=10UL=2U m=3 M9Vo PCHW=10UL=2U m=3 M101 1 VDD!VDD! PCHW=10UL=2U m=3 M112 1 VDD!VDD! PCHW=10UL=2U m=3 VBIAS3VB300.75v VBIAS45VB v VBIAS67VB6700v Vin1Vi-0AC1.ACDEC k Vin2Vi+00v.PLOTACVDB(Vo+).END

Experiment We test the Open Loop Gain of a Inverting Integrator of Example 8-8.

OP AMP *********************************.PROTECT.OPTION POST.LIB 'c:\mm0355v.l' TT.UNPROTECT.op vdd vdd! 0 1.5v vss vss! v.global vdd! vss! ******************************************************* m1 5 v+ 6 6 pch w=10u l=2u m=3 m2 4 v- 6 6 pch w=10u l=2u m=3 m3 6 vb3 vdd! vdd! pch w=100u l=2u m=7 m4 5 vb45 vss! vss! nch w=10u l=2u m5 4 vb45 vss! vss! nch w=10u l=2u m6 3 vb67 5 vss! nch w=10u l=2u m7 vo vb67 4 vss! nch w=10u l=2u m pch w=10u l=2u m=3 m9 vo pch w=10u l=2u m=3 m vdd! vdd! pch w=10u l=2u m=3 m vdd! vdd! pch w=10u l=2u m=3 vbias3 vb v vbias45 vb v vbias67 vb67 0 0v ******************************************************* *cload vo 0 10p c2vov-0.7n R1vinv-10k *** transient simulation *** Vin1vin0AC1.ACDEC k Vin2Vi+00v.PLOTACVDB(Vo).END

Negative Feedback on Bandwidth

Experiment R i =3.3kΩ, R f =220kΩ

We use the high gain amplifier whose gain is 817k. The ckt of this amplifier is as follows:

Open loop open loop test.PROTECT.OPTION POST.LIB "C:\mm0355v.l" TT.UNPROTECT.op VDDVDD! 0 3.3V VSSVSS! V M11 1 VDD! VDD! PCHW=50U L=2U M22 1 VDD! VDD! PCHW=50U L=2U M VDD! PCHW=50U L=2U M VDD! PCHW=50U L=2U M53 VB5 5 VSS! NCHW=100U L=2U M64 VB6 6 VSS! NCHW=100U L=2U M75 Vi- 7 VSS!NCHW=100U L=2U M86 Vi+ 7 VSS!NCHW=100U L=2U M97 VB9 VSS! VSS!NCHW=100U L=2U M10Vo 4 VDD! VDD!PCHW=150U L=2U M11Vo VB11 VSS! VSS!NCHW=50U L=2U VBIAS5VB501.9V VBIAS6VB601.9V VBIAS9VB900.6V VBIAS1 VB V VBVi-01.65v Vin1110AC1.ACDEC k Vin2Vi v *Ri1203.3k *Rf12Vo220k.PLOTACVDB(Vo).END

f c(ol) =1.3kHz and open loop gain is 100dB.

f c(cl) =100kHz

Close loop close loop test.PROTECT.OPTION POST.LIB "C:\mm0355v.l" TT.UNPROTECT.op VDDVDD! 0 3.3V VSSVSS! V M11 1 VDD! VDD! PCHW=50U L=2U M22 1 VDD! VDD! PCHW=50U L=2U M VDD! PCHW=50U L=2U M VDD! PCHW=50U L=2U M53 VB5 5 VSS! NCHW=100U L=2U M64 VB6 6 VSS! NCHW=100U L=2U M75 Vi- 7 VSS!NCHW=100U L=2U M86 Vi+ 7 VSS!NCHW=100U L=2U M97 VB9 VSS! VSS!NCHW=100U L=2U M10Vo 4 VDD! VDD!PCHW=150U L=2U M11Vo VB11 VSS! VSS!NCHW=50U L=2U VBIAS5VB501.9V VBIAS6VB601.9V VBIAS9VB900.6V VBIAS1 VB V VBVi v Vin1110AC1.ACDEC k Vin2Vi v Ri1203.3k Rf12Vo220k.PLOTACVDB(Vo).END

Experiment R i =3.3kΩ, R f =220kΩ

We use the high gain amplifier whose gain is 42k. The ckt of this amplifier is as follows: M1=(10u/2u)*3 M2=(10u/2u)*3 M3 =(100u/2u)*7 M4 =(10u/2u)* M5 =(10u/2u)* M6 =(10u/2u)* M7 =(10u/2u)* M8 =(10u/2u)*3 M9 =(10u/2u)*3 M10 =(10u/2u)*3 M11 =(10u/2u)*3

f c(ol) =25kHz.

Open loop open loop *********************************.PROTECT.OPTION POST.LIB 'c:\mm0355v.l' TT.UNPROTECT.op VDDVDD! 01.5V VSSVSS! 0-1.5V.GLOBAL VDD! VSS! ******************************************************* M15 Vi+ 66 PCHW=10UL=2U m=3 M24 Vi- 66 PCHW=10UL=2U m=3 M36 VB3 VDD!VDD! PCHW=100UL=2U m=7 M45 VB45 VSS!VSS! NCHW=10UL=2U M54 VB45 VSS!VSS! NCHW=10UL=2U M63 VB67 5VSS! NCHW=10UL=2U M7VO VB67 4VSS! NCHW=10UL=2U M PCHW=10UL=2U m=3 M9VO 3 22 PCHW=10UL=2U m=3 M101 1 VDD!VDD! PCHW=10UL=2U m=3 M112 1 VDD!VDD! PCHW=10UL=2U m=3 VBIAS3VB300.75v VBIAS45VB v VBIAS67VB6700v Vin1Vi+0AC1.ACDEC k Vin2Vi-00v *RiVi-03.3k *RfVi-Vo220k.PLOT AC VDB(Vo).END

f c(cl) =30MHz.

Close loop close loop *********************************.PROTECT.OPTION POST.LIB 'c:\mm0355v.l' TT.UNPROTECT.op VDDVDD! 01.5V VSSVSS! 0-1.5V.GLOBAL VDD! VSS! ******************************************************* M15 Vi+ 66 PCHW=10UL=2U m=3 M24 Vi- 66 PCHW=10UL=2U m=3 M36 VB3 VDD!VDD! PCHW=100UL=2U m=7 M45 VB45 VSS!VSS! NCHW=10UL=2U M54 VB45 VSS!VSS! NCHW=10UL=2U M63 VB67 5VSS! NCHW=10UL=2U M7VO VB67 4VSS! NCHW=10UL=2U M PCHW=10UL=2U m=3 M9VO 3 22 PCHW=10UL=2U m=3 M101 1 VDD!VDD! PCHW=10UL=2U m=3 M112 1 VDD!VDD! PCHW=10UL=2U m=3 VBIAS3VB300.75v VBIAS45VB v VBIAS67VB6700v Vin1Vi+0AC1.ACDEC k RiVi-03.3k RfVi-Vo220k.PLOT AC VDB(Vo).END

Experiment R i =1k Ω, R f =47kΩ

We use the high gain amplifier whose gain is 42k. The ckt of this amplifier is as follows: M1=(10u/2u)*3 M2=(10u/2u)*3 M3 =(100u/2u)*7 M4 =(10u/2u)* M5 =(10u/2u)* M6 =(10u/2u)* M7 =(10u/2u)* M8 =(10u/2u)*3 M9 =(10u/2u)*3 M10 =(10u/2u)*3 M11 =(10u/2u)*3

f c(ol) =25kHz.

Open loop open loop *********************************.PROTECT.OPTION POST.LIB 'c:\mm0355v.l' TT.UNPROTECT.op VDDVDD! 01.5V VSSVSS! 0-1.5V.GLOBAL VDD! VSS! ******************************************************* M15 Vi+ 66 PCHW=10UL=2U m=3 M24 Vi- 66 PCHW=10UL=2U m=3 M36 VB3 VDD!VDD! PCHW=100UL=2U m=7 M45 VB45 VSS!VSS! NCHW=10UL=2U M54 VB45 VSS!VSS! NCHW=10UL=2U M63 VB67 5VSS! NCHW=10UL=2U M7VO VB67 4VSS! NCHW=10UL=2U M PCHW=10UL=2U m=3 M9VO 3 22 PCHW=10UL=2U m=3 M101 1 VDD!VDD! PCHW=10UL=2U m=3 M112 1 VDD!VDD! PCHW=10UL=2U m=3 VBIAS3VB300.75v VBIAS45VB v VBIAS67VB6700v Vin1Vi-0AC1.ACDEC k Vin2Vi+00v *RiVi-111k *RfVi-Vo47k.PLOT AC VDB(Vo).END

f c(cl) =25MHz.

Close loop close loop *********************************.PROTECT.OPTION POST.LIB 'c:\mm0355v.l' TT.UNPROTECT.op VDDVDD! 01.5V VSSVSS! 0-1.5V.GLOBAL VDD! VSS! ******************************************************* M15 Vi+ 66 PCHW=10UL=2U m=3 M24 Vi- 66 PCHW=10UL=2U m=3 M36 VB3 VDD!VDD! PCHW=100UL=2U m=7 M45 VB45 VSS!VSS! NCHW=10UL=2U M54 VB45 VSS!VSS! NCHW=10UL=2U M63 VB67 5VSS! NCHW=10UL=2U M7VO VB67 4VSS! NCHW=10UL=2U M PCHW=10UL=2U m=3 M9VO 3 22 PCHW=10UL=2U m=3 M101 1 VDD!VDD! PCHW=10UL=2U m=3 M112 1 VDD!VDD! PCHW=10UL=2U m=3 VBIAS3VB300.75v VBIAS45VB v VBIAS67VB6700v Vin1110AC1.ACDEC k Vin2Vi+00v RiVi-111k RfVi-Vo47k.PLOT AC VDB(Vo).END

Experiment R i =3.3kΩ, R f =220kΩ

The ckt of this amplifier is as follows:

f c(ol) =10MHz.

Open loop Example 4.1 DIFFERENTIAL AMPLIFIER.PROTECT.LIB "C:\mm0355v.l" TT.UNPROTECT VDDVDD! 0 1.5V VSSVSS! V MQ12 Vi+ 3 VSS! NCHW=10U L=2U MQ2Vo+ Vi- 3 VSS! NCHW=10U L=2U MQ32 2 VDD! VDD! PCHW=7U L=2U MQ4Vo+ 2 VDD! VDD! PCHW=7U L=2U MQ53 3 VSS! VSS! NCHW=100U L=2U.OP Vin1Vi+0AC1.ACDEC k Vin2Vi-00v *RiVi-03.3k *RfVi-Vo+220k.PLOTACVDB(Vo+).END

f c(cl) =55MHz.

Close loop Example 4.1 DIFFERENTIAL AMPLIFIER.PROTECT.LIB "C:\mm0355v.l" TT.UNPROTECT VDDVDD! 0 1.5V VSSVSS! V MQ12 Vi+ 3 VSS! NCHW=10U L=2U MQ2Vo+ Vi- 3 VSS! NCHW=10U L=2U MQ32 2 VDD! VDD! PCHW=7U L=2U MQ4Vo+ 2 VDD! VDD! PCHW=7U L=2U MQ53 3 VSS! VSS! NCHW=100U L=2U.OP Vin1Vi+0AC1.ACDEC k *Vin2Vi-100v RiVi-03.3k RfVi-Vo+220k.PLOTACVDB(Vo+).END

Experiment R i =1k Ω, R f =47kΩ

We use the high gain amplifier whose gain is 817k. The ckt of this amplifier is as follows:

f c(ol) =500Hz.

Open loop open loop.PROTECT.OPTION POST.LIB "C:\mm0355v.l" TT.UNPROTECT.op VDDVDD! 0 3.3V VSSVSS! V M11 1 VDD! VDD! PCHW=50U L=2U M22 1 VDD! VDD! PCHW=50U L=2U M VDD! PCHW=50U L=2U M VDD! PCHW=50U L=2U M53 VB5 5 VSS! NCHW=100U L=2U M64 VB6 6 VSS! NCHW=100U L=2U M75 Vi- 7 VSS!NCHW=100U L=2U M86 Vi+ 7 VSS!NCHW=100U L=2U M97 VB9 VSS! VSS!NCHW=100U L=2U M10Vo 4 VDD! VDD!PCHW=150U L=2U M11Vo VB11 VSS! VSS!NCHW=50U L=2U VBIAS5VB501.9V VBIAS6VB601.9V VBIAS9VB900.6V VBIAS1 VB V VBVi v Vin1110AC1.ACDEC k Vin2Vi+01.65v *Ri11121k *Rf11Vo47k.PLOTACVDB(Vo).END

f c(cl) =70kHz.

Close loop close loop.PROTECT.OPTION POST.LIB "C:\mm0355v.l" TT.UNPROTECT.op VDDVDD! 0 3.3V VSSVSS! V M11 1 VDD! VDD! PCHW=50U L=2U M22 1 VDD! VDD! PCHW=50U L=2U M VDD! PCHW=50U L=2U M VDD! PCHW=50U L=2U M53 VB5 5 VSS! NCHW=100U L=2U M64 VB6 6 VSS! NCHW=100U L=2U M75 Vi- 7 VSS!NCHW=100U L=2U M86 Vi+ 7 VSS!NCHW=100U L=2U M97 VB9 VSS! VSS!NCHW=100U L=2U M10Vo 4 VDD! VDD!PCHW=150U L=2U M11Vo VB11 VSS! VSS!NCHW=50U L=2U VBIAS5VB501.9V VBIAS6VB601.9V VBIAS9VB900.6V VBIAS1 VB V VBVi v Vin1120AC1.ACDEC k Vin2Vi+01.65v Ri11121k Rf11Vo47k.PLOTACVDB(Vo).END