US 12,092,669 B2
AD converter, power measurement device for wideband noise using same, and power spectrum measurement device
Noriyuki Kawaguchi, Chofu (JP); Takashi Maeda, Chofu (JP); Kenichi Harada, Kawasaki (JP); Kenji Ema, Kawasaki (JP); and Kensuke Ozeki, Kawasaki (JP)
Assigned to ELECS INDUSTRY CO., LTD., Kanagawa (JP)
Appl. No. 18/560,972
Filed by ELECS INDUSTRY CO., LTD., Kawasaki (JP)
PCT Filed Mar. 29, 2022, PCT No. PCT/JP2022/015594
§ 371(c)(1), (2) Date Nov. 15, 2023,
PCT Pub. No. WO2022/249747, PCT Pub. Date Dec. 1, 2022.
Claims priority of application No. 2021-086707 (JP), filed on May 24, 2021.
Prior Publication US 2024/0255555 A1, Aug. 1, 2024
Int. Cl. G01R 21/133 (2006.01)
CPC G01R 21/133 (2013.01) 5 Claims
OG exemplary drawing
 
1. A power measurement device for a wideband noise signal, for measuring power of a noise signal emitted by an object to be measured, the power measurement device comprising:
a comparator configured to compare an input voltage of an analog signal corresponding to the noise signal that has been measured to a determination voltage;
an adjustment unit configured to shift at least one of the input voltage of the analog signal or the determination voltage;
an encoder configured to output time-series data of one bit based on a result of the comparison obtained by the comparator;
a processing unit configured to calculate a frequency of appearance of an output code included in the time-series data;
a control unit configured to cause the adjustment unit to operate so that the determination voltage is offset with respect to an average voltage of the noise signal; and
a conversion unit configured to apply the frequency of appearance calculated by the processing unit and the determination voltage to a cumulative distribution function to obtain a standard deviation corresponding to a power value of the noise signal that has been input.