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Real time DSP Professors: Eng. Julian S. Bruno Eng. Jerónimo F. Atencio Sr. Lucio Martinez
Analog to digital Converter
The BIG picture Real time algorithms Results FAST!
Signals Amplitude Frequency Noise
Quantization Noise Analog Input range: Vin = 0 to FS (Full Scale) Resolution: N = 3 bits Code: 2 N = 8 Full Scale = 10V Voltage step or quantum (Q = FS/N)
Unipolar Binary Codes ScaleFS (10V)Binary 7/88,75111 3/47,5110 5/86,25101 1/25100 3/83,75011 1/42,5010 1/81,25001 00000
Bipolar Binary Codes ScaleFS (+/-5V)Two Comp. 3/43,75011 1/22,5010 1/41,25001 00000 - 1/4-1,25111 - 1/2-2,5110 - 3/4-3,75101 -5100
Errors in a data converter
Noise Floor AD7722
Cuantización no uniforme
Tabla de codificación
Differences Between A−Law and u−Law
Basic ADC Analog: Analog Input Reference Voltage Analog Ground Analog Power Supply Digital: Digital output Control Signals Sampling Clock Digital Ground Digital Power Supply
Flash converters Expensives High power Resolution limited to around 8-bits Large chip size Fast Resistors: 2 N Comparators: 2 (N-1)
SAR The accuracy and linearity is determined by the DAC Available in resolutions up to 16-bits
First-Order Sigma-Delta ADC
Analysis of Sigma-Delta Modulator The integrator acts as a lowpass filter to the input signal and a highpass filter to the quantization noise
Second-Order Sigma-Delta ADC
Basic Knowledge of Data Converters
Analog to Digital Conversion (ADC)
Lecture 17: Analog to Digital Converters Lecturers: Professor John Devlin Mr Robert Ross.
Data Acquisition ET 228 Chapter
Digital to Analog and Analog to Digital Conversion
Digital Fundamentals Tenth Edition Floyd Chapter 12.
Analog to Digital Conversion. Introduction An analog-to-digital converter (ADC, A/D, or A to D) is a device that converts continuous signals to discrete.
LSU 06/04/2007Electronics 71 Analog to Digital Converters Electronics Unit – Lecture 7 Representing a continuously varying physical quantity by a sequence.
5/4/2006BAE Analog to Digital (A/D) Conversion An overview of A/D techniques.
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10/23/2003ME DAC Lecture1 DAC Sunij Chacko Pierre Emmanuel Deliou Thomas Holst Used with modification.
The Design of a Delta Sigma Modulator Presented by: Sameh Assem Ibrahim 24-July-2003.
Sampling and quantization Seminary 2. Problem 2.1 Typical errors in reconstruction: Leaking and aliasing We have a transmission system with f s =8 kHz.
Mixed Signal Chip Design Lab Analog-to-Digital Converters Jaehyun Lim, Kyusun Choi Department of Computer Science and Engineering The Pennsylvania State.
Interfacing Analog and Digital Circuits
DIGITAL SYSTEMS TCE INTERFACING WITH ANALOG DEVICES (Week 12)
1 Analog-to-digital converter Prepared by: Selah al-Battah Mohammed Al-khabbaz Atiyah Alnakhli Ali Dumyati.
Interfacing with the Analog World Wen-Hung Liao, Ph.D.
1 Dr. Un-ki Yang Particle Physics Group or Shuster 5.15 Amplifiers and Feedback: 3.
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