[PPT] - Component selection 1 (c) 2020 A.J.M. Montagne Component selection PowerPoint Presentation

SLIDE 1

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Component selection

SLIDE 2

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Component selection

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SLIDE 3

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Component selection

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Noise:

SLIDE 4

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Component selection

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Noise:

SLIDE 5

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Component selection

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Noise:
Bandwidth:

SLIDE 6

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Component selection

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Noise:
Bandwidth:
Accuracy:

SLIDE 7

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Component selection

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Noise:
Bandwidth:
Accuracy:
Drive capability:

SLIDE 8

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Component selection

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Noise:
Bandwidth:
Accuracy:
Drive capability:

SLIDE 9

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Component selection

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Noise:
Bandwidth:
Accuracy:
Drive capability:

SLIDE 10

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Component selection

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600

3.4nF

Noise:
Bandwidth:
Accuracy:
Drive capability:

OPA211

SLIDE 11

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Component selection

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220

600 3.4nF 47uF

Noise:
Bandwidth:
Accuracy:
Drive capability:

OPA211

SLIDE 12

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Component selection

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20k

220 600 3.4nF OPA211

Noise:
Bandwidth:
Accuracy:
Drive capability:

SLIDE 13

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Component selection

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20k

220 600 3.4nF 47uF

Noise:
Bandwidth:
Accuracy:
Drive capability:

OPA211

SLIDE 14

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Component selection

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20k

20k 220 600 3.4nF 47uF OPA211

Noise:
Bandwidth:
Accuracy:
Drive capability:

SLIDE 15

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Component selection

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20k

20k 220 600 3.4nF 47uF 1uF OPA211

Noise:
Bandwidth:
Accuracy:
Drive capability:

SLIDE 16

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Component selection

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1k

20k 20k 220 1k 600 3.4nF 47uF 1uF OPA211

Noise:
Bandwidth:
Accuracy:
Drive capability:

SLIDE 17

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Component selection

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1k

20k 20k 220 1k 600 3.4nF 47uF 47uF 1uF OPA211

Noise:
Bandwidth:
Accuracy:
Drive capability:

SLIDE 18

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Component selection

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1k

20k 20k 220 1k 600 3.4nF 47uF 47uF 1uF OPA211

Noise:
Bandwidth:
Accuracy:
Drive capability:

SLIDE 19

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Modeling OpAmp

SLIDE 20

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Modeling OpAmp Small-signal dynamic behavior OPA211

SLIDE 21

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Modeling OpAmp Small-signal dynamic behavior OPA211

SLIDE 22

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Modeling OpAmp Small-signal dynamic behavior OPA211

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0.7

60 3.6k 8u 900n 1p 1p 7.5p 20k A_0*(1+s/2/PI/40M)/(1+s/2/PI/120)/(1+2/2/PI/20M)

SLIDE 23

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Modeling OpAmp Small-signal dynamic behavior OPA211

.model OPA211_A0 OV + cd = 8p ; differential-mode input capacitance + gd = 50u ; differential-mode input conductance + cc = 2p ; common-mode input capacitance + av = {A_0*(1+s/2/PI/40M)/(1+s/2/PI/120)/(1+s/2/PI/20M)} ; voltage gain + zo = {3.6k/(1+s*3.6k*8u) + 0.7 + s*900n*60/(60+s*900n)} ; output impedance

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0.7

60 3.6k 8u 900n 1p 1p 7.5p 20k A_0*(1+s/2/PI/40M)/(1+s/2/PI/120)/(1+2/2/PI/20M)

SLIDE 24

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Modeling OpAmp

SLiCAP noise and bias models

SLIDE 25

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Modeling OpAmp

SLiCAP noise and bias models

SLIDE 26

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Modeling OpAmp

SLiCAP O_dcvar nullor with offset and bias

SLiCAP noise and bias models

SLIDE 27

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Modeling OpAmp

SLiCAP O_dcvar nullor with offset and bias

Standard deviation offset voltage

SLiCAP noise and bias models

SLIDE 28

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Modeling OpAmp

SLiCAP O_dcvar nullor with offset and bias

Standard deviation offset voltage Standard deviation offset current

SLiCAP noise and bias models

SLIDE 29

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Modeling OpAmp

SLiCAP O_dcvar nullor with offset and bias

Standard deviation offset voltage Standard deviation offset current Mean value bias current

SLiCAP noise and bias models

SLIDE 30

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Modeling OpAmp

SLiCAP O_dcvar nullor with offset and bias

Standard deviation offset voltage Standard deviation offset current Mean value bias current Standard deviation bias current

SLiCAP noise and bias models

SLIDE 31

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Modeling OpAmp

SLiCAP O_dcvar nullor with offset and bias

Standard deviation offset voltage Standard deviation offset current Mean value bias current Standard deviation bias current

SLiCAP O_noise nullor with equivalent input noise sources

SLiCAP noise and bias models

SLIDE 32

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Modeling OpAmp

SLiCAP O_dcvar nullor with offset and bias

Standard deviation offset voltage Standard deviation offset current Mean value bias current Standard deviation bias current

SLiCAP O_noise nullor with equivalent input noise sources

Spectral density noise voltage

SLiCAP noise and bias models

SLIDE 33

33

Modeling OpAmp

SLiCAP O_dcvar nullor with offset and bias

Standard deviation offset voltage Standard deviation offset current Mean value bias current Standard deviation bias current

SLiCAP O_noise nullor with equivalent input noise sources

Spectral density noise voltage Spectral density noise current

SLiCAP noise and bias models

SLIDE 34

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Modeling OpAmp

SLiCAP O_dcvar nullor with offset and bias

Standard deviation offset voltage Standard deviation offset current Mean value bias current Standard deviation bias current

SLiCAP O_noise nullor with equivalent input noise sources

Spectral density noise voltage Spectral density noise current

SLiCAP noise and bias models

SLIDE 35

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SLiCAP noise verification

SLIDE 36

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SLiCAP noise verification

SLIDE 37

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SLiCAP noise verification

Noise figure 2.4dB over 1.57x500kHz bandwidth.

SLIDE 38

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SLiCAP noise verification

Noise figure 2.4dB over 1.57x500kHz bandwidth.

SLIDE 39

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SLiCAP biasing verification

SLIDE 40

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SLiCAP biasing verification

SLIDE 41

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SLiCAP biasing verification

All component tolerances 1% (3-sigma)

SLIDE 42

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SLiCAP biasing verification

All component tolerances 1% (3-sigma) Standard deviation of the output voltage: 10mV

SLIDE 43

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SLiCAP biasing verification

All component tolerances 1% (3-sigma) Standard deviation of the output voltage: 10mV

SLIDE 44

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Frequency response

SLIDE 45

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Frequency response

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0.7

60 3.6k 8u 900n 1p 1p 7.5p 20k A_0*(1+s/2/PI/40M) (1+s/2/PI/120)(1+2/2/PI/20M) 20k

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220

3.4n 600

SLIDE 46

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Frequency response

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0.7

60 3.6k 8u 900n 1p 1p 7.5p 20k A_0*(1+s/2/PI/40M) (1+s/2/PI/120)(1+2/2/PI/20M) 20k

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220

3.4n 600 LRC series resonance at 2.88MHz

SLIDE 47

47

Frequency response

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0.7

60 3.6k 8u 900n 1p 1p 7.5p 20k A_0*(1+s/2/PI/40M) (1+s/2/PI/120)(1+2/2/PI/20M) 20k

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220

3.4n 600 LRC series resonance at 2.88MHz

SLIDE 48

48

6
5
4
3
2
1

Real [Hz]

#106

3
2
1

1 2 3

Imag [Hz]

#106

Root Locus

LOOPGAIN Poles LOOPGAIN Zeros SERVO Poles:A 0 = 1.0e+00 SERVO Poles:A 0 = 6.7e+05 SERVO Poles:A 0 = 1.0e+00 .. 6.7e+05

Frequency response

SLIDE 49

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6
5
4
3
2
1

Real [Hz]

#106

3
2
1

1 2 3

Imag [Hz]

#106

Root Locus

LOOPGAIN Poles LOOPGAIN Zeros SERVO Poles:A 0 = 1.0e+00 SERVO Poles:A 0 = 6.7e+05 SERVO Poles:A 0 = 1.0e+00 .. 6.7e+05

Frequency response

dominant pole

SLIDE 50

50

Frequency response

dominant pole

6
5
4
3
2
1

Real [Hz]

#106

3
2
1

1 2 3

Imag [Hz]

#106

Root Locus

LOOPGAIN Poles LOOPGAIN Zeros SERVO Poles:A 0 = 1.0e+00 SERVO Poles:A 0 = 6.7e+05 SERVO Poles:A 0 = 1.0e+00 .. 6.7e+05

non-dominant pole too close to ignore

SLIDE 51

51

Frequency response

dominant pole

6
5
4
3
2
1

Real [Hz]

#106

3
2
1

1 2 3

Imag [Hz]

#106

Root Locus

LOOPGAIN Poles LOOPGAIN Zeros SERVO Poles:A 0 = 1.0e+00 SERVO Poles:A 0 = 6.7e+05 SERVO Poles:A 0 = 1.0e+00 .. 6.7e+05

non-dominant pole too close to ignore

SLIDE 52

52

Frequency response

Uncompensated amplifier

SLIDE 53

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Frequency response

102 103 104 105 106 107

frequency [Hz]

300
200
100

100 200

phase [deg] Phase plots

ASYMPTOTIC LOOPGAIN SERVO DIRECT GAIN

102 103 104 105 106 107

150
100
50

50 100

magnitude [dB] Magnitude plots

Uncompensated amplifier

SLIDE 54

54

Frequency response

0.5 1 1.5 2

time [s]

#10-6

20

20 40 60 80 100 120

Unit step response

GAIN

102 103 104 105 106 107

frequency [Hz]

300
200
100

100 200

phase [deg] Phase plots

ASYMPTOTIC LOOPGAIN SERVO DIRECT GAIN

102 103 104 105 106 107

150
100
50

50 100

magnitude [dB] Magnitude plots

Uncompensated amplifier

SLIDE 55

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Frequency compensation

SLIDE 56

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Frequency compensation

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+
0.7

60 3.6k 8u 900n 1p 1p 7.5p 20k A_0*(1+s/2/PI/40M) (1+s/2/PI/120)(1+2/2/PI/20M) 20k

+

220

3.4n 600 2.2p 27

SLIDE 57

57

Frequency compensation

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+
0.7

60 3.6k 8u 900n 1p 1p 7.5p 20k A_0*(1+s/2/PI/40M) (1+s/2/PI/120)(1+2/2/PI/20M) 20k

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220

3.4n 600 2.2p 27 Phantom zero

SLIDE 58

58

Frequency compensation

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+
0.7

60 3.6k 8u 900n 1p 1p 7.5p 20k A_0*(1+s/2/PI/40M) (1+s/2/PI/120)(1+2/2/PI/20M) 20k

+

220

3.4n 600 2.2p 27 Phantom zero Phantom zero

SLIDE 59

59

Frequency compensation

+

+
0.7

60 3.6k 8u 900n 1p 1p 7.5p 20k A_0*(1+s/2/PI/40M) (1+s/2/PI/120)(1+2/2/PI/20M) 20k

+

220

3.4n 600 2.2p 27 Phantom zero Phantom zero

SLIDE 60

60

Frequency compensation

6
5
4
3
2
1

Real [Hz]

#106

3
2
1

1 2 3

Imag [Hz]

#106

Root Locus

LOOPGAIN Poles LOOPGAIN Zeros SERVO Poles:A 0 = 1.0e+00 SERVO Poles:A 0 = 6.7e+05 SERVO Poles:A 0 = 1.0e+00 .. 6.7e+05

SLIDE 61

61

Frequency compensation

6
5
4
3
2
1

Real [Hz]

#106

3
2
1

1 2 3

Imag [Hz]

#106

Root Locus

LOOPGAIN Poles LOOPGAIN Zeros SERVO Poles:A 0 = 1.0e+00 SERVO Poles:A 0 = 6.7e+05 SERVO Poles:A 0 = 1.0e+00 .. 6.7e+05

SLIDE 62

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Frequency compensation

Compensated amplifier

SLIDE 63

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Frequency compensation

102 103 104 105 106 107

frequency [Hz]

250
200
150
100
50

50 100 150

phase [deg] Phase plots

102 103 104 105 106 107

150
100
50

50 100

magnitude [dB] Magnitude plots

ASYMPTOTIC LOOPGAIN SERVO DIRECT GAIN

Compensated amplifier

SLIDE 64

64

Frequency compensation

0.5 1 1.5 2

time [s]

#10-6 20 40 60 80 100

Unit step response

GAIN

102 103 104 105 106 107

frequency [Hz]

250
200
150
100
50

50 100 150

phase [deg] Phase plots

102 103 104 105 106 107

150
100
50

50 100

magnitude [dB] Magnitude plots

ASYMPTOTIC LOOPGAIN SERVO DIRECT GAIN

Compensated amplifier

SLIDE 65

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Construction

SLIDE 66

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Construction

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1k

1k 47u 47u 220 20k 2.2p 27 47u 100n 20k 600 3.3n 5 1u

SLIDE 67

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Construction

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1k

1k 47u 47u 220 20k 2.2p 27 47u 100n 20k 600 3.3n 5 1u

In Out +5V GND

SLIDE 68

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T est results

Small-signal step response Source: 2mVpp, 100kHz, 50% Uncompensated amplifier T

tal load capacitance 3.4nF

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1k

1k 47u 47u 220 20k 47u 100n 20k 600 3.4n 5 1u

SLIDE 69

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T est results

Small-signal step response Source: 2mVpp, 100kHz, 50% Partly compensated amplifier T

tal load capacitance 3.4nF

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1k

1k 47u 47u 220 27 47u 100n 20k 600 3.4n 5 1u 20k

SLIDE 70

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T est results

Small-signal step response Source: 2mVpp, 100kHz, 50% Partly compensated amplifier T

tal load capacitance 3.4nF

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1k

1k 47u 47u 220 20k 2.2p 47u 100n 20k 600 3.4n 5 1u

SLIDE 71

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T est results

Small-signal step response Source: 2mVpp, 100kHz, 50% Compensated amplifier T

tal load capacitance 3.4nF

+

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1k

1k 47u 47u 220 20k 2.2p 27 47u 100n 20k 600 3.4n 5 1u

SLIDE 72

72

T est results

Large-signal step response Source: 50mVpp, 100kHz, 50% Compensated amplifier T

tal load capacitance 3.4nF

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1k

1k 47u 47u 220 20k 2.2p 27 47u 100n 20k 600 3.4n 5 1u

SLIDE 73

73

T est results

Large-signal sine response Source: 50mVpp, 100kHz Compensated amplifier T

tal load capacitance 3.4nF

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1k

1k 47u 47u 220 20k 2.2p 27 47u 100n 20k 600 3.4n 5 1u

SLIDE 74

74

T est results

Large-signal overdrive Source: 100mVpp, 1kHz, triangle Compensated amplifier T

tal load capacitance 3.4nF

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+
1k

1k 47u 47u 220 20k 2.2p 27 47u 100n 20k 600 3.4n 5 1u

Source/sink voltage drop < 10mV

SLIDE 75

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T est results

Small-signal transfer HP4195A, source -40dBm Compensated amplifier T

tal load capacitance 3.4nF

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+
+
1k

1k 47u 47u 220 20k 2.2p 27 47u 100n 20k 600 3.4n 5 1u

SLIDE 76

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T est results

Oscilloscope noise Shorted input 83uV RMS

SLIDE 77

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T est results

Output noise Compensated amplifier T

tal load capacitance 3.4nF

+

+
+
1k

1k 47u 47u 220 20k 2.2p 27 47u 100n 20k 600 3.4n 5 1u

385uV RMS Corrected for scope noise: 376uV N=2.3dB @ 1MHz NBW N=2.7dB @ 900kHz NBW

SLIDE 78

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Conclusions and remarks

SLIDE 79

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Conclusions and remarks

1. Amplifier performance complies with requirements

SLIDE 80

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Conclusions and remarks

1. Amplifier performance complies with requirements
2. Spice simulation with TI macro model did not show

small-signal instability

SLIDE 81

81

Conclusions and remarks

1. Amplifier performance complies with requirements
2. Spice simulation with TI macro model did not show

small-signal instability

3. Modeling of individual performance aspects seems

successful approach

SLIDE 82

82

Conclusions and remarks

1. Amplifier performance complies with requirements
2. Spice simulation with TI macro model did not show

small-signal instability

3. Modeling of individual performance aspects seems