US 11,984,902 B2
Digital decimation filtering circuit of analog to digital conversion circuit
Grant Howard McGibney, Calgary (CA); Patrick Troy Gray, Cedar Park, TX (US); Gerald Dale Morrison, Redmond, WA (US); and Daniel Keith Van Ostrand, Leander, TX (US)
Assigned to SIGMASENSE, LLC., Austin, TX (US)
Filed by SIGMASENSE, LLC., Wilmington, DE (US)
Filed on May 25, 2023, as Appl. No. 18/201,896.
Application 18/201,896 is a continuation of application No. 17/561,438, filed on Dec. 23, 2021, granted, now 11,695,423.
Application 17/561,438 is a continuation of application No. 17/168,962, filed on Feb. 5, 2021, granted, now 11,265,002, issued on Mar. 1, 2022.
Application 17/168,962 is a continuation of application No. 16/780,133, filed on Feb. 3, 2020, granted, now 10,917,101, issued on Feb. 9, 2021.
Application 16/780,133 is a continuation of application No. 16/365,169, filed on Mar. 26, 2019, granted, now 10,554,215, issued on Feb. 4, 2020.
Prior Publication US 2023/0308107 A1, Sep. 28, 2023
Int. Cl. H03M 1/06 (2006.01); G06F 3/041 (2006.01); G06F 3/044 (2006.01); H03H 7/01 (2006.01); H03M 1/12 (2006.01); H03M 3/00 (2006.01)
CPC H03M 1/0626 (2013.01) [G06F 3/044 (2013.01); H03H 7/0161 (2013.01); H03M 1/1245 (2013.01); H03M 3/462 (2013.01); G06F 3/041 (2013.01)] 5 Claims
OG exemplary drawing
 
1. A digital decimation filtering circuit of an analog to digital conversion circuit, the digital decimation filtering circuit comprises:
an n-tap anti-aliasing filter operable to:
receive a 1-bit analog to digital converter (ADC) output signal at an oversampling rate; and
filter the 1-bit ADC output signal to remove frequencies higher than a selected cut-off frequency to produce an n-bit filtered signal at a first data output rate; and
a decimator operable to:
receive the n-bit filtered signal at the first data output rate;
decimate the n-bit filtered signal by a decimation factor to produce a set of output signals; and
sum the set of outputs to produce a decimated signal at a second data output rate, wherein the first data output rate is greater than the second data output rate.