US 11,709,201 B2
Instrument noise correction for jitter measurements
Daniel De Godoy Peixoto, Austin, TX (US); and Gregory J. Richmond, Cupertino, CA (US)
Assigned to Skyworks Solutions, Inc., Irvine, CA (US)
Filed by Skyworks Solutions, Inc., Irvine, CA (US)
Filed on Sep. 1, 2020, as Appl. No. 17/9,480.
Prior Publication US 2022/0065927 A1, Mar. 3, 2022
Int. Cl. G01R 31/317 (2006.01); G01R 29/26 (2006.01)
CPC G01R 31/31709 (2013.01) [G01R 29/26 (2013.01); G01R 31/31725 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A non-volatile computer readable medium storing instructions to determine jitter in a clock signal under test that, when the instructions are executed by a processor, cause the processor to:
determine two points of input-referred noise data for a crossing time, a first point of the two points being before the crossing time and a second point of the two points being after the crossing time, the crossing time being a time that a clock signal representation crosses a threshold value, the clock signal representation corresponding to the clock signal under test; and
determine a first time error associated with the crossing time using a displacement to the clock signal representation caused by the first point of the input-referred noise data, a displacement to the clock signal representation caused by the second point of input-referred noise data, a clock slew rate of the clock signal representation, a period of a sampling clock of an analog to digital converter used to generate the input-referred noise data, and the crossing time, the first time error indicative of a change in the crossing time due to the input-referred noise data.