US 12,224,761 B2
Noise-shaping of additive dither in analog-to-digital converters
Nithin Gopinath, Bangalore (IN); Visvesvaraya A. Pentakota, Bangalore (IN); Neeraj Shrivastava, Bangalore (IN); and Harshit Moondra, Mumbai (IN)
Assigned to Texas Instruments Incorporated, Dallas, TX (US)
Filed by Texas Instruments Incorporated, Dallas, TX (US)
Filed on Apr. 26, 2022, as Appl. No. 17/729,374.
Prior Publication US 2023/0344436 A1, Oct. 26, 2023
Int. Cl. H03M 1/20 (2006.01); H03M 1/06 (2006.01)
CPC H03M 1/0641 (2013.01) [H03M 1/0626 (2013.01)] 15 Claims
OG exemplary drawing
 
1. An apparatus comprising:
an analog-to-digital converter (ADC) having an analog input and a digital output;
an adder having an analog input, having a dither input, and having an analog output coupled to the analog input of the ADC; and
a dither generation circuit including:
an analog dither signal generator having an output; and
an analog high-pass filter and an analog low-pass filter coupled in series between the output of the analog dither signal generator and the dither input of the adder.