PPT-– 1 – Data Converters Oversampling ADC Professor Y. Chiu

EECT 7327 Fall 2014 Oversampling ADC Nyquist Rate ADC 2 Data Converters Oversampling ADC Professor Y Chiu EECT 7327 Fall 2014 The black box version of the quantization process. Lecture 23•Oversampled ADCs–1Bit quantization•Quantization error spectrum•SQNR analysis•Limit cycle oscillations–2order SDDynamic range •Practical implementation Data Converters. Professor Yun Chiu. © . 2014. Erik . Jonsson. School of Electrical Engineering and Computer Science . University of Texas at . Dallas. Logistics. – . 2. –. Instructor: Professor Yun Chiu. Subranging. ADCs Professor Y. Chiu. EECT 7327 . Fall 2014. Subranging. ADC. Subranging. ADC Architecture. – . 2. –. Data Converters . Subranging. ADCs Professor Y. Chiu. EECT 7327 . Fall 2014. EECT 7327 . Fall 2014. Interpolation. Interpolation. – . 2. –. Data Converters Interpolating and Folding ADC Professor Y. Chiu. EECT 7327 . Fall 2014. Uniformly spaced zero-crossings in flash ADCs. EECT 7327 . Fall 2014. Data Converter Basics. A/D and D/A Conversion. – . 2. –. Data Converters Data Converter Basics Professor Y. Chiu. EECT 7327 . Fall 2014. A/D Conversion. D/A Conversion. EECT 7327 . Fall 2014. Successive Approximation. (SA) ADC. Successive Approximation ADC. – . 2. –. Data Converters Successive Approximation ADC Professor Y. Chiu. EECT 7327 . Fall 2014. Binary search algorithm → N*. EECT 7327 . Fall 2014. DAC Architecture. DAC Architecture. – . 2. –. Data Converters DAC Professor Y. Chiu. EECT 7327 . Fall 2014. Nyquist DAC architectures. Binary-weighted DAC. Unit-element (thermometer-coded) DAC. EECT 7327 . Fall 2014. Algorithmic . (Cyclic) ADC. Algorithmic (Cyclic) ADC. – . 2. –. Data Converters Algorithmic ADC Professor Y. Chiu. EECT 7327 . Fall 2014. Input is sampled first, then circulates in the loop for N clock cycles. EECT 7327 Fall 2014. Sample-and-Hold (S/H) Basics. ZOH vs. Track-and-Hold (T/H). – . 2. –. Data Converters Sample-and-Hold Professor Y. Chiu. EECT 7327 Fall 2014. Zero acquisition time. Infinite bandwidth. Subranging. ADCs Professor Y. Chiu. EECT 7327 . Fall 2014. Subranging. ADC. Subranging. ADC Architecture. – . 2. –. Data Converters . Subranging. ADCs Professor Y. Chiu. EECT 7327 . Fall 2014. EECT 7327 . Fall 2014. Pipelined ADC. Pipelined ADC Architecture. – . 2. –. Data Converters Pipelined ADCs Professor Y. Chiu. EECT 7327 . Fall 2014. A bucket brigade of algorithmic ADC w/ concurrent operation of all stages. EECT 7327 . Fall 2014. CMOS Comparator. Comparator. – . 2. –. Data Converters Comparator Professor Y. Chiu. EECT 7327 . Fall 2014. Transfer characteristic. (ideal). Circuit symbol. Detects the polarity of the analog input signal and produces a digital output (1 or 0) accordingly – threshold-crossing detector. Presenter: Syed Sharjeelullah. Course: CS-732. Authors: Jefferson L. P. Lima. David Macedo. . Cleber. . Zanchettin.