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High-Voltage Programmable Delta-Sigma Modulation Voltage-Control Circuit, Lucien Jan Bissey
High-Voltage Programmable Delta-Sigma Modulation Voltage-Control Circuit, Lucien Jan Bissey
Boise State University Theses and Dissertations
Modern memory semiconductors require different internal voltages to accomplish the myriad of tasks that are required for operation. These internal voltages are multiples of the external voltage that is applied to the part. This multiple can be greater than one, as is the case with voltage pumps, less than one, as in the case of regulated supplies, and negative, as in the case of negative charge pumps. All of these potentials require control and regulation to ensure proper operation of the die. The control of the supply ensures that the required potentials are available when the die needs it. The …
Gain And Offset Error Correction For Cmos Image Sensor Using Delta-Sigma Modulation, Kuang Ming Yap
Gain And Offset Error Correction For Cmos Image Sensor Using Delta-Sigma Modulation, Kuang Ming Yap
Boise State University Theses and Dissertations
A delta-sigma modulation analog-to-digital converter (ADC) has many benefits over the use of a pipeline ADC in a CMOS image sensor. These benefits include lower power, noise reduction, ease of maximizing the input range, and simpler signal routing for large arrays. Multiple delta-sigma modulation ADCs are required in a CMOS image sensor, one for each pixel column. Any voltage threshold mismatch between ADCs will introduce gain and offset errors in the ADC's transfer function. These errors will lead to fixed-pattern noise. Correcting gain and offset error for every ADCs in the image sensor will require a complex digital signal processor. …