Analog Digital Conversion

1
Analog Digital Conversion
2
Basics
3
Characteristics of converters

• Static Transfer

4
Ideal Quantizer
5
Unipolar and bipolar Quantizer error
6
Linearity
7
Offset and gain error
8
Differential nonlinearity
9
Differential nonlinearity
10
Large DNL
11
Integral Nonlinearity
12
ADC INL and DNL
13
DAC DNL and INL
14
Measurements of static Characteristics on ADC
15
Code Boundary Servo
16
Code Boundary Servo
17
Histogram Testing
18
Histogram Setup
19
Ideal 3 bits ADC
20
Sample 3 bits ADC
21
DNL from Histogram
22
Dynamic PerformanceCode Density Test - DCT
23
Quantization noise
24
Quantization noise
25
Signal to noise ratio
26
Effective number of bits ENOB
27
Effective number of bits ENOB
28
Effective number of bits ENOB
29
AD conversion classification
30
Converters Architectures
31
ADC -Flash
32
Folding Converters
33
Two step converter
34
2 stage subranging ADC
35
More on Subranging ADC
36
Recycling converter
37
Pipeline converter
38
3 bit pipelining ADC Basic Architecture
39
Basic Block
40
Example
41
DAC Logics ADC

• Counting
• Successive approximation

42
Successive Approximation
43
Dual Slope
44
The Voltage-to-Frequency (V-f) Converter
45
Oversampling ADC
46
Sigma-Delta Modulators
47
1st Order Delta Sigma Modulator
48
Simulation
49
A SIMPLE FIRST ORDER DELTA-SIGMA CONVERTER
50
Digital Analog Converters
51
Scaling Converters
52
Resistor scaling
53
Resistor scaling R2R
54
Mosfet R2R
55
Scaled Capacitance Converter
56
Charge Redistribution