The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 30, 2021
Filed:
Feb. 19, 2019
Analog Devices International Unlimited Company, Limerick, IE;
Sanjay Rajasekhar, Newbury, GB;
Roberto Sergio Matteo Maurino, Turin, IT;
Analog Devices International Unlimited Company, Limerick, IE;
Abstract
Noise sources in a pipelined ADC circuit can include kT/C sampling noise from a capacitor DAC circuit and residue amplifier sampling noise. The kT/C sampling noise is inversely proportional to the size of the sampling capacitors; the larger sampling capacitors produce less noise. However, larger sampling capacitor can be difficult to drive and physically occupy significant die area. By using the described techniques, the inversely proportional relationship between the sampling noise and the size of the sampling capacitors is no longer true. The size of the sampling capacitors can be greats reduced, which can reduce the die area and reduce the power consumption of the ADC, and the kT/C sampling noise can be canceled using correlated double sampling (CDS) techniques.