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:
Jan. 14, 2020
Filed:
Oct. 08, 2018
Analog Devices, Inc., Norwood, MA (US);
Huajun Zhang, Quincy, MA (US);
Zhichao Tan, Westford, MA (US);
Analog Devices, Inc., Norwood, MA (US);
Abstract
A pipeline ADC architecture with suitable feedback can implement noise shaping. By feeding back the residue generated by the last residue generating stage to selected locations in the pipeline ADC, the delays in a pipeline ADC can create a finite impulse response (FIR) filtered version of the quantization error. The FIR filtered quantization error is added to the signal and evaluated by the pipeline ADC, which results in spectral shaping of the quantization noise. Unlike a conventional pipeline ADC, the output of the backend stage is scaled and filtered by a noise transfer function (NTF) of the residue generating stages prior to combining the output with other outputs of the pipeline ADC. The processing of the shaped quantization noise by the backend stage results in further noise suppression.