1

Analog Circuits Designed

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1. A Resistive Load CMOS Amplifier2. A CMOS Amplifier with an Active Load3. An Amplifier with D and G Connected4. An Amplifier with a Current Mirror Whose Load

is Resistive5. An Amplifier with a Current Mirror Whose Load

Is Active6. A Differential Amplifier with Resistive Loads 7. A Differential Amplifier with Active Loads and a

Constant Current Source 8. A Two-Stage Differential Amplifier 9. A Cascode Amplifier with a Resistive Load10. A Cascode Amplifier with Active Loads

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11. A Cascode Amplifier with a Current Mirror

12. A Cascode Differential Amplifier with Current Mirror and Constant Current Source

13. A Two-Stage Cascode Differential Amplifier

14. Another Cascode Differential Amplifier

15. An Inverting Amplifier

16. A Non-Inverting Amplifier

17. An Inverting Integrator

18. A Differentiator

19. An Op-Amp as a Zero-level Detector

20. A Nonzero-Level Detector

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21. A Comparator with Hysteresis22. A One Shot Circuit23. A Relaxation Square Wave Generator24. Ring Square Wave Generator25. Ring Square Wave Generator Using Capacitor26.

A Square Wave Generator Based upon a Schmitt Trigger

27. A VCO Square Wave Generator Circuit Based upon Schmidt Trigger

28. Another VCO Schmidt Trigger Square Wave GeneratorUsing a Simple Inverter29.

Another VCO Schmidt Trigger Square Wave Generator Using a Simple Inverter with a Resistive Load

30. A Wien-Bridge Sinusoidal Oscillator

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31. A Colpitts LC Tuned Oscillator 32. A Low Pass Filter33. Another Low Pass Filter34. Still Another Low Pass Filter35. A High Pass Filter36. Another High Pass Filter37. A High Pass Filter38. Another Low Pass Filter39. Still Another Band-pass Filter40. A Sallen and Key Low Pass Filter 41. A Sallen and Key High Pass Filter42. A Mixer

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A Resistive Load CMOS Amplifier

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VSG2=0.9V

VGS1=0.65V

G

G

S

D

Vout

S

D

VDD=3.3v

I

Q2

Q1

R1=0 (pseudo)5u/0.35u

5u/0.35u

11

1

3

2

4

A CMOS Amplifier with an Active Load

8

RL=100k

D

S

G

Id

Vdd=3.3v

2

1

W=20u, L=0.35u

An Amplifier with D and G Connected.

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An Amplifier with a Current MirrorWhose Load is Resistive

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An Amplifier with a Current Mirror Whose Load Is Active

11

VDD=1.5V

V2

MQ1=10u/2u MQ2=10u/2u

V5=-0.95v

VSS=-1.5V

VDD=1.5V

Vin+2

V1

Vi+

R1=270k R2=270k

MQ5=100u/2u

Vi-

A Differential Amplifier with Resistive Loads

12

M3 M4

M1 M2

Vss - 1.5V

M5

VDD 1.5V

I SS 60u

7u/2u7u/2u

10u/2u 10u/2u

100u/2u

VG= 0.95V

M3 M4

M1 M2

Vss -

M5

VDD

I 60u

10u/2u 10u/2u

-

Rm=0

Vi+ Vi-

V2V1

-0.95v

A Differential Amplifier with Active Loads and a Constant Current Source

13

1

2

3V-

V+

1

2

3V-

V+

VSS=-1.5v

1

2

3V-

V+

VDD=1.5v

vo

M6

M7

14/2

4/3

M4

M2M1

M5

M3

3/2 3/2

10/210/2

30/2

VBIAS5

vin

VBIAS7

A Two-Stage Differential Amplifier

14

VDD=3.3V

M2

M1

D

S

G

D

S

G

VG2=1V

VGS1=0.6V

RL=500k

vin

5u/0.35u

5u/0.35u

vout

A Cascode Amplifier with a Resistive Load

15

Vout

VDD=5V

M4

M3

M2

M1

10u/1u

20u/0.5u

30u/0.5u

30u/1u

0.817V

1.8V

3V

4V

A Cascode Amplifierwith Active Loads

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M1

M3

M4M5

M6

M7

M8M1

M2

M3

M4M5

M6

M7

M8 Vin

3.3V

0.611V

0.71V0.8p

A Cascode Amplifierwith a CurrentMirror

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VDD=3.3V

M7100/

2

M8100/2

M5100/

2

M6100/2

M350/2

M450/2

M1 50/2

M250/2

VSS=0V

M9100/2

Vout

VBIAS6 = 1.9V

VBIAS9 =0.6V

VBIAS5 = 1.9V

1.65V

V+

1

23

4

5 6

7

V-

1.65V

A Cascode DifferentialAmplifier with CurrentMirror and ConstantCurrent Source

18

VDD=3.3V

M7100/

2

M8100/2

M5100/

2

M6100/2

M350/2

M450/2

M1 50/2

M250/2

M1150/2

VSS=0V

M9100/2

VSS=0V

VBIAS11 = 1.75V

Vout

M10150/2

VBIAS6 = 1.9V

VBIAS9 =0.6V

VBIAS5 = 1.9V

1.65V

V+

VDD=3.3V

1

23

4

5 6

7

Vo

AC

V-

1.65V

A Two-StageCascodeDifferentialAmplifier

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VDD!=1.5V

VBIAS3=0.75

VBIAS67=0V

VBIAS45=-0.737V

V+ V-

Vout

VSS!=-1.5V

M3

M1 M2

M4M5

M6 M7

M8 M9

M10 M11

VDD!=1.5V

Another Cascode Differential Amplifier

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An Inverting Amplifier

VDD!VDD!

VBIAS3=0.75

VBIAS67=0V

VBIAS45=-0.737V

V+ V-

Vout

VSS!

M3

M1 M2

M4M5

M6 M7

M8 M9

M10 M11

Vin

0Virtual ground R2=100000kR1=1000k

i1i2

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A Non-Inverting Amplifier

VDD!=1.5vVDD!=1.5v

VBIAS3=0.75

VBIAS67=0V

VBIAS45=-0.737V

V+ V-

Vout

VSS!=-1.5v

M3

M1 M2

M4M5

M6 M7

M8 M9

M10 M11

Vin

R2=10000kR1=1000k

Vin-V-

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An Inverting Integrator

VDD!=1.5v

VBIAS3=0.75

VBIAS67=0V

VBIAS45=-0.737V

V+ V-

Vout

VSS!=-1.5v

M3

M1 M2

M4M5

M6 M7

M8 M9

M10 M11

Vin

Virtual groundC=0.7nFR1=10k

VDD!=1.5v

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A Differentiator

VDD!=1.5vVDD!=1.5v

VBIAS3=0.75

VBIAS67=0V

VBIAS45=-0.737V

V+ V-

Vout

VSS!=-1.5v

M3

M1 M2

M4M5

M6 M7

M8 M9

M10 M11

Vin

Virtual groundC=0.7nF R=10k

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An Op-Amp as a Zero-level Detector

VDD!=1.5vVDD!=1.5v

VBIAS3=0.75

VBIAS67=0V

VBIAS45=-0.737V

V+ V-

Vout

VSS!=-1.5v

M3

M1 M2

M4M5

M6 M7

M8 M9

M10 M11

Vin

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A Nonzero-Level Detector

VDD!=1.5vVDD!=1.5v

VBIAS3=0.75

VBIAS67=0V

VBIAS45=-0.737V

V+ V-

Vout

VSS!=-1.5v

M3

M1 M2

M4M5

M6 M7

M8 M9

M10 M11

Vin

VREF

+ -

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A Comparator with Hysteresis

VDD!=1.5V

VBIAS3=0.75

VBIAS67=0V

VBIAS45=-0.737V

V+ V-

Vout

VSS!=-1.5V

M3

M1 M2

M4M5

M6 M7

M8 M9

M10 M11

VDD!=1.5V

Vin

R1=11000k

R2=11000k

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• A One Shot Circuit.

VDD1=3.3V

R=20000k

R11=500k R12=500k

M11=3u/1u

M12=3u/1u

M21=30u/1u

V0

M22=30u/1u

M23=30u/0.5u

M24=30u/0.5u

VDD3=1.5V

VDD2=5.0017v

VG24=4V

VG23=3V

VG22=1.8V

Vin

1

11

100p

12

52

43

10

9

7

8

6

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A Relaxation Square Wave Generator

R=10000000k

M21=30u/1u

M22=30u/1u

M23=30u/0.5u

M24=30u/0.5uVG24=4V

VG23=2.5V

VG22=1.8V

9

15

14

11

12

10

M11=30u/1u

M12=30u/1u

M13=30u/0.5u

M14=30u/0.5uVG14=4V

VG13=3V

VG12=1.8V

1

7

6

3

4

2

5

8

VDD1=5V VDD2=5V

13

C=0.01p

29

Ring Square Wave Generator

30

Using Capacitor

Vin 1 2 3 4

C1=10p C3=3p C4=2pC2=5p

Vin

31

R1=60k

R2=90k

R=1500k

C=100p

Vo

VIN

V20

VDD!=1.5vVDD!=1.5v

VBIAS3=0.75

VBIAS67=0V

VBIAS45=-0.70V

Vi+ Vi-

VSS!=-1.5v

M3

M1 M2

M4M5

M6 M7

M8 M9

M10 M11

A Square Wave Generator Based upon a Schmitt Trigger

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A VCO Square Wave Generator Circuit Based upon Schmidt Trigger

C1 = 500p

Vo+

VBIAS3=0.75V

VBIAS67=0V

VBIAS45=-0.70V

Vi+ Vi-

VSS!=-1.5v

M3

M1 M2

M4M5

M6 M7

M8 M9

M10 M11

VDD!=1.5v

M12 M13

M14

M15

M16M17VB8=1.2V

Vi-= -0.3V

1

3

4

5

620

7

9

11

Vo+

R2 = 2000k

R1 = 1000k

VDD!=1.5vVDD!=1.5v VDD!=1.5v

VSS!=-1.5vVSS!=-1.5v

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C1 = 500p

Vo+

VDD!=1.5v

VBIAS3=0.75V

VBIAS67=0V

VBIAS45=-0.70V

Vi+ Vi-

M3

M1 M2

M4M5

M6 M7

M8 M9

M10 M11M14

M15

Vi-= -0.3V

1

3

45

620R1 = 1000k

R1 = 2000k

VSS!=-1.5v

VSS!=-1.5v

VDD!=1.5v

VDD!=1.5v

Another VCO Schmidt Trigger Square Wave GeneratorUsing a Simple Inverter

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Vo+

VBIAS3=0.75V

VBIAS67=0V

VBIAS45=-0.70V

Vi+ Vi-

M3

M1 M2

M4M5

M6 M7

M8 M9

M10 M11

VSS!=-1.5v

M15

Vi-= -0.3V

1

3

45

620R1=10000K

R2=20000K

VKK!=3v

R3

C1=130000p

VDD!=1.5v VDD!=1.5v

VSS!=-1.5v

Another VCO Schmidt Trigger Square Wave GeneratorUsing a Simple Inverter with a Resistive Load

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VDD!VDD!

VBIAS3=0.75

VBIAS67=0V

VBIAS45=-0.737V

V+ V-

Vout

VSS!

M3

M1 M2

M4M5

M6 M7

M8 M9

M10 M11

R2

R1 R5

R4C1R3 C2

Lead-lag Circuit

A Wien-Bridge Sinusoidal Oscillator

36

L=50uH

C1=1130uF

C2=23uF

R=0.5K

(W=10u, L=1u)

A Colpitts LC Tuned Oscillator

37

A Low Pass Filter

VDD!=1.5vVDD!=1.5v

VBIAS3=0.75

VBIAS67=0V

VBIAS45=-0.737V

V+ V-

Vout

VSS!=-1.5v

M3

M1 M2

M4M5

M6 M7

M8 M9

M10 M11

Vin

R=1k

C=1u Ra=5.5k

Rb=1k

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Another Low Pass Filter

VDD!=1.5vVDD!=1.5v

VBIAS3=0.75

VBIAS67=0V

VBIAS45=-0.737V

V+ V-

Vout

VSS!=-1.5v

M3

M1 M2

M4M5

M6 M7

M8 M9

M10 M11

Vin2

R=1k

C=1u Ra=10k

Rb=1k

Vin1

R1=1000k

R2=1000k

39

Still Another Low Pass Filter

VDD!=1.5vVDD!=1.5v

VBIAS3=0.75

VBIAS67=0V

VBIAS45=-0.737V

V+ V-

Vout

VSS!=-1.5v

M3

M1 M2

M4M5

M6 M7

M8 M9

M10 M11

Vin

R2=100kC=0.01u

R1=89k

40

A High Pass Filter

VDD!=1.5vVDD!=1.5v

VBIAS3=0.75

VBIAS67=0V

VBIAS45=-0.737V

V+ V-

Vout

VSS!=-1.5v

M3

M1 M2

M4M5

M6 M7

M8 M9

M10 M11

Vin

R=1k

C=1u

Ra=1k

Rb=1.5k

41

Another High Pass Filter

VDD!=1.5vVDD!=1.5v

VBIAS3=0.75

VBIAS67=0V

VBIAS45=-0.737V

V+ V-

Vout

VSS!=-1.5v

M3

M1 M2

M4M5

M6 M7

M8 M9

M10 M11

Vin2

R=1k

C=0.5u Ra=20k

Rb=1k

Vin1

42

High Pass Filter

VDD!=1.5vVDD!=1.5v

VBIAS3=0.75

VBIAS67=0V

VBIAS45=-0.737V

V+ V-

Vout

VSS!=-1.5v

M3

M1 M2

M4M5

M6 M7

M8 M9

M10 M11

Vin

R2=1k

C=1u

R1=1k

43

Vo+

VDD! =1.5v

VBIAS3=0.75V

VBIAS67=0V

VBIAS45=-0.70V

Vi+ Vi-

VSS!=-1.5v

M3

M1 M2

M4M5

M6 M7

M8 M9

M10 M111

3

45

6

C5=0.0048u

R4=3.3k

R1=3.3k

Vin

C2=0.0048u

R3=3.3k

VDD! =1.5v

Low Pass Filter

44

Vo+

VDD!=1.5v

VBIAS3=0.75V

VBIAS67=0V

VBIAS45=-0.70V

Vi+ Vi-

VSS!=-1.5v

M3

M1 M2

M4M5

M6 M7

M8 M9

M10 M111

3

45

6

R5=13k

C4=50p

R1=13k

Vin

R2=13k

C3=50p

VDD!=1.5v

Band-pass Filter

45

Sallen and Key Low Pass Filter

VDD!=1.5vVDD!=1.5v

VBIAS3=0.75

VBIAS67=0V

VBIAS45=-0.737V

V+ V- Vout

VSS!=-1.5v

M3

M1 M2

M4M5

M6 M7

M8 M9

M10

M11

Vin

R1=1k

C2=0.02u

R2=1k

Ra=3.6k

Rb=1k

C1=0.02u

46

Sallen and Key High Pass Filter

VDD!=1.5vVDD!=1.5v

VBIAS3=0.75

VBIAS67=0V

VBIAS45=-0.737V

V+ V- Vout

VSS!=-1.5v

M3

M1 M2

M4M5

M6 M7

M8 M9

M10

M11

Vin

R1=3.3k

C2=0.0048u

R2=3.3KRa=8k

Rb=1k

C1=0.0048u

47

VDD=1.5v

Vss=-1.5v

V2

VGS=-0.98v

V1

R1=130k R2=130k

M1

120u/6uM2

120u/6u

M3

100u/2u

Vout

8

76

4 5

3

3_31

2

R3=0k

Mixer