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:
Feb. 23, 2021
Filed:
Sep. 30, 2019
Silicon Laboratories Inc., Austin, TX (US);
Abdulkerim L. Coban, Austin, TX (US);
Sanjeev Suresh, Austin, TX (US);
Silicon Laboratories Inc., Austin, TX (US);
Abstract
A continuous-time (CT) delta-sigma modulator (DSM) based analog to digital converter (ADC) in a radio receive chain supports a wide range of data rates in a power efficient way in a small die area. The ADC utilizes a 2order loop-filter with a single-amplifier loop-filter topology using a two stage Miller amplifier with a feed forward path and a push-pull output stage. High bandwidth operations utilize a 'negative-R' compensation scheme at the amplifier input. Negative-R assistance is disabled for low data rate applications. With the negative-R assistance disabled, loop-filter resistor values are increased, instead of only the loop filter capacitor values to scale the noise transfer function (NTF), thereby limiting the capacitor area needed and enabling lower power operation. The NTF zero location is programmable allowing the NTF zero to be located near the intermediate frequency for different bandwidths to reduce the DSM quantization noise contribution for narrow-band (low data rate) applications.