公开(公告)号：US11895218B2

公开(公告)日：2024-02-06

申请号：US17720257

申请日：2022-04-13

Applicant: Korea Advanced Institute of Science and Technology

Inventor： Jaehyouk Choi ,  Suneui Park ,  Seyeon Yoo ,  Seojin Choi ,  Jooeun Bang

IPC: H04L7/033 ,  H03L7/08

CPC classification number: H04L7/033 ,  H03L7/08

Abstract: Proposed are an ultra-low jitter low-power phase-locked loop using a power-gating injection-locked frequency multiplier-based phase detector (PG-ILFM PD) and an operating method thereof. The proposed PG-ILFM PD includes a replica voltage controlled oscillator (R-VCO) configured to cut off the power supply of the R-VCO repeatedly based on a reference signal SREF and a fundamental sampling phase detector (FSPD) configured to receive an output signal SILFM of the R-VCO as a reference signal for sampling and detect a phase error of a main voltage controlled oscillator (M-VCO).

公开(公告)号：US11271584B2

公开(公告)日：2022-03-08

申请号：US17159197

申请日：2021-01-27

Applicant: KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGY

Inventor： Jaehyouk Choi ,  Taeho Seong ,  Yongsun Lee ,  Chanwoong Hwang ,  Hangi Park

IPC: H03M3/00 ,  G04F10/00

Abstract: Disclosed is an integrated circuit, which includes a DTC block including DTCs, receiving a first reference signal and a first division signal, and outputting a second reference signal and a second division signal based on the first reference signal, the first division signal, and control codes, a TDC comparing phases of the second reference signal and the second division signal and outputting a comparison signal, a digital loop filter filtering the comparison signal, an oscillator generating an output signal based on the filtered comparison signal, a delta-sigma modulator outputting a first signal and a quantized noise signal based on first and second division ratio signals, a divider dividing a frequency of the output signal based on the first signal and outputting the first division signal, and a probability modulator generating the control codes based on the quantized noise signal. Probability density functions of the control codes are time-invariant.