US 12,438,552 B2
ΔΣmodulation utilizing continuous-time input and discrete-time loop filter
Omid Rajaee, San Diego, CA (US); and Rahim Bagheri, Poway, CA (US)
Assigned to Microchip Technology Incorporated, Chandler, AZ (US)
Filed by Microchip Technology Incorporated, Chandler, AZ (US)
Filed on May 19, 2023, as Appl. No. 18/320,774.
Claims priority of provisional application 63/365,076, filed on May 20, 2022.
Prior Publication US 2023/0378974 A1, Nov. 23, 2023
Int. Cl. H03M 3/00 (2006.01)
CPC H03M 3/422 (2013.01) [H03M 3/368 (2013.01)] 16 Claims
OG exemplary drawing
 
1. An apparatus, comprising:
an input circuit to receive an analog signal and produce an analog input signal, the input circuit comprising a resistor-capacitor (RC) integrator;
a switched-capacitor to sample the analog input signal and produce a discrete-time, sampled input signal;
an integrator to process the discrete-time, sampled input signal;
a quantizer to convert an output of the integrator to a digital signal; and
a feedback loop to provide the digital signal to respective inputs of the RC integrator and the integrator.