公开(公告)号：US20190280706A1

公开(公告)日：2019-09-12

申请号：US16052890

申请日：2018-08-02

Applicant: Analog Devices Global Unlimited Company

Inventor： Rares BODNAR ,  Asif AHMAD ,  Christopher Peter HURRELL

IPC: H03M1/34 ,  H03M1/20 ,  H03M1/16

Abstract: A dither is an uncorrelated signal, usually pseudo-random noise injected into the input of an ADC such that a given input value of the wanted signal becomes spread over a plurality of codes. This reduces the effect of DNL and also smooths the integral non-linearity (INL) response of the ADC. The advantages of introducing dither could be obtained without having to perturb the signal input to the ADC. This avoids the introduction of additional components in the ADC. The dither can be applied to the components used to form a residue of the ADC stage within a pipelined converter. For example, a dither can be applied solely to a DAC part or different dithers can be applied to a ADC and DAC parts respectively. This allows greater flexibility of linearization of the ADC response and the formation of an analog residue by the DAC.

公开(公告)号：US20190280705A1

公开(公告)日：2019-09-12

申请号：US15916009

申请日：2018-03-08

Applicant: Analog Devices Global Unlimited Company

Inventor： Rares BODNAR ,  Asif AHMAD ,  Christopher Peter HURRELL

IPC: H03M1/14 ,  H03M1/80 ,  H03M1/12

Abstract: A stage, suitable for use in an analog to digital converter or a digital to analog converter, can have a plurality of slices that can be operated together to form a composite output. The stage can have reduced thermal noise, while each slice on its own has sufficiently small capacitance to respond quickly to changes in digital codes applied to the slice. This feature allows a fast conversion to be achieved without loss of noise performance.

公开(公告)号：US20190280704A1

公开(公告)日：2019-09-12

申请号：US16053455

申请日：2018-08-02

Applicant: Analog Devices Global Unlimited Company

Inventor： Rares BODNAR ,  Roberto S. MAURINO ,  Christopher Peter HURRELL ,  Asif AHMAD

IPC: H03M1/06

Abstract: A stage, suitable for use in and analog to digital converter or a digital to analog converter, comprises a plurality of slices. The slices can be operated together to form a composite output having reduced thermal noise, while each slice on its own has sufficiently small capacitance to respond quickly to changes in digital codes applied to the slice. This allows a fast conversion to be achieved without loss of noise performance. The slices can be sub-divided to reduce scaling mismatch between the most significant bit and the least significant bit. A shuffling scheme is implemented that allows shuffling to occur between the sub-sections of the slices without needing to implement a massively complex shuffler.

公开(公告)号：US20200162095A1

公开(公告)日：2020-05-21

申请号：US16692371

申请日：2019-11-22

Applicant: Analog Devices Global Unlimited Company

Inventor： Rares BODNAR ,  Asif AHMAD ,  Christopher Peter HURRELL

IPC: H03M1/14 ,  H03M1/12 ,  H03M1/80

Abstract: A stage, suitable for use in an analog to digital converter or a digital to analog converter where the stage comprises a plurality of slices that can be operated together to form a composite output, can have reduced thermal noise, whilst each slice on its own has sufficiently small capacitance to respond quickly to changes in digital codes applied to the slice. This allows a fast conversion to be achieved without loss of noise performance.