US 11,888,654 B2
Offset detector circuit for differential signal generator, receiver, and method of compensating for offset of differential signal generator
Jueon Kim, Seoul (KR); Taehyoung Kim, Singapore (SG); Seungjin Park, Suwon-si (KR); Jihwan Hyun, Hwaseong-si (KR); Myoungbo Kwak, Seoul (KR); and Junghwan Choi, Hwaseong-si (KR)
Assigned to SAMSUNG ELECTRONICS CO., LTD., Suwon-si (KR); and NANYANG TECHNOLOGICAL UNIVERSITY, Singapore (SG)
Filed by Samsung Electronics Co., Ltd., Suwon-si (KR)
Filed on Aug. 30, 2022, as Appl. No. 17/898,851.
Claims priority of application No. 10-2021-0167273 (KR), filed on Nov. 29, 2021; and application No. 10-2022-0042073 (KR), filed on Apr. 5, 2022.
Prior Publication US 2023/0171132 A1, Jun. 1, 2023
Int. Cl. H04L 25/03 (2006.01); H04L 27/06 (2006.01); H03K 21/08 (2006.01); H03K 9/02 (2006.01); H04B 17/21 (2015.01); H03K 5/24 (2006.01); G01R 31/317 (2006.01)
CPC H04L 25/03006 (2013.01) [G01R 31/31703 (2013.01); H03K 5/24 (2013.01); H03K 9/02 (2013.01); H03K 21/08 (2013.01); H04B 17/21 (2015.01); H04L 27/06 (2013.01)] 20 Claims
OG exemplary drawing
 
9. A receiver comprising:
a differential signal generator configured to receive a single-ended Pulse Amplitude Modulation (PAM)-N signal, where N is an odd number, and generate differential signals based on the single-ended PAM-N signal, a reference signal, and a pair of compensation signals;
an offset detector circuit configured to detect a predetermined signal pattern from a digital signal determined based on the single-ended PAM-N signal, and generate an offset detection signal when a comparison result signal of a positive signal and a negative signal included in the differential signals in signal periods corresponding to the predetermined signal pattern matches a predetermined offset pattern; and
an offset compensator configured to adjust signal levels of the reference signal and the pair of compensation signals in response to the offset detection signal, and provide the reference signal and the pair of compensation signals having adjusted levels to the differential signal generator.