US 12,456,988 B2
Dithering techniques for analog-to-digital converters
Mishab I, Malappuram (IN); Himanshu Varshney, Bangalore (IN); Nagarajan Viswanathan, Bangalore (IN); Parth Sameer Kalgaonkar, Bangalore (IN); and Sai Aditya Nurani, Bengaluru (IN)
Assigned to TEXAS INSTRUMENTS INCORPORATED, Dallas, TX (US)
Filed by Texas Instruments Incorporated, Dallas, TX (US)
Filed on Dec. 27, 2023, as Appl. No. 18/397,352.
Prior Publication US 2025/0219652 A1, Jul. 3, 2025
Int. Cl. H03M 1/20 (2006.01)
CPC H03M 1/201 (2013.01) 25 Claims
OG exemplary drawing
 
1. An analog-to-digital converter (ADC) comprising:
first ADC circuitry having an input and an output;
second ADC circuitry having an input and an output; and
dither circuitry having a first input coupled to the output of the first ADC circuitry, having a second input coupled to the output of the second ADC circuitry, having a first output coupled to the input of the first ADC circuitry, having a second output coupled to the input of the second ADC circuitry, and having a third output, the dither circuitry configured to:
generate a first dither signal to produce a first dithered input signal at the first output coupled to the input of the first ADC circuitry;
generate a second dither signal to produce a second dithered input signal at the second output coupled to the input of the second ADC circuitry, the first dither signal and the second dither signal to have opposite signs; and
produce an output signal at the third output based on the first output of the first ADC circuitry and the second output of the second ADC circuitry.