Adc Case Study Analysis
Design
ADC & DAC
Within the system there are combinations of analogue and digital variables within the system. The purpose of the ADC is to convert analogue signals into digital ones within the system before it can be manipulated by the FPGA. The ADC takes the analogue information provided by the PGA and converts it into digital to be multiplied with the blood flow simulation signal by the FPGA. In order for the ADC input and output to communicate between the PGA and FPGA effectively important factors are 12 bits of accuracy and parallel interface in order to achieve system accuracy and highest resolution possible. The purpose of the DAC is to convert digital signals into analogue ones within the system before it can be transmitted from the system to the ultrasound machine being calibrated. The DAC will interface the digital signal provided by the FPGA and output the analogue representation the system to the output buffer. In order for the DAC to communicate between the FPGA and output buffer effectively important variables of the DAC are 12 bits of accuracy and differential/single in order to achieve system accuracy and highest resolution possible.
The ADC requirements are as follows: * Fully differential or single ended input * Parallel interface/design * 12 bit resolution * 40 MHz sampling rate * Representation in Two’s compliment
The DAC requirements are as follows: * Differential or single ended output * 12 bit resolution * 40 MHz sampling rate
The input for the ADC is essential for interfacing with the PGA. The output of the PGA will be differential ended which requires the ADC to have a differential ended input. The ADC will benefit being incorporated with a differential input offering advantages ranging from good common mode rejection and reduction in distortion.
The control interface for the ADC is in parallel. Parallel interfacing allows for faster routing between the ADC and the PGA and FPGA since they are
ADC & DAC
Within the system there are combinations of analogue and digital variables within the system. The purpose of the ADC is to convert analogue signals into digital ones within the system before it can be manipulated by the FPGA. The ADC takes the analogue information provided by the PGA and converts it into digital to be multiplied with the blood flow simulation signal by the FPGA. In order for the ADC input and output to communicate between the PGA and FPGA effectively important factors are 12 bits of accuracy and parallel interface in order to achieve system accuracy and highest resolution possible. The purpose of the DAC is to convert digital signals into analogue ones within the system before it can be transmitted from the system to the ultrasound machine being calibrated. The DAC will interface the digital signal provided by the FPGA and output the analogue representation the system to the output buffer. In order for the DAC to communicate between the FPGA and output buffer effectively important variables of the DAC are 12 bits of accuracy and differential/single in order to achieve system accuracy and highest resolution possible.
The ADC requirements are as follows: * Fully differential or single ended input * Parallel interface/design * 12 bit resolution * 40 MHz sampling rate * Representation in Two’s compliment
The DAC requirements are as follows: * Differential or single ended output * 12 bit resolution * 40 MHz sampling rate
The input for the ADC is essential for interfacing with the PGA. The output of the PGA will be differential ended which requires the ADC to have a differential ended input. The ADC will benefit being incorporated with a differential input offering advantages ranging from good common mode rejection and reduction in distortion.
The control interface for the ADC is in parallel. Parallel interfacing allows for faster routing between the ADC and the PGA and FPGA since they are