公开(公告)号：US10097136B1

公开(公告)日：2018-10-09

申请号：US15846854

申请日：2017-12-19

Applicant: NATIONAL CHUNG SHAN INSTITUTE OF SCIENCE AND TECHNOLOGY

Inventor： Hsiao-Chin Chen ,  Yen-Ting Chiang ,  Chien-Te Yu

IPC: H03B5/12 ,  H04B1/40

Abstract: A transformer feed-back quadrature voltage controlled oscillator (QVCO) includes a first VCO; a second VCO; and a dynamic phase error correction circuit, having a plurality of coupling capacitors connected between the first and second VCOs, wherein the capacitances of the coupling capacitors are varied according to a digital control signal to correct a phase error of local oscillating (LO) signals of quadrature phases output by the first and second VCOs.

公开(公告)号：US10396712B2

公开(公告)日：2019-08-27

申请号：US15825173

申请日：2017-11-29

Applicant: NATIONAL CHUNG SHAN INSTITUTE OF SCIENCE AND TECHNOLOGY

Inventor： Hsiao-Chin Chen ,  Yen-Ting Chiang ,  Chien-Te Yu

IPC: H03B5/12 ,  H03L7/093 ,  H03D7/14 ,  H04L27/00 ,  H03B27/00

Abstract: A transformer feed-back quadrature voltage controlled oscillator (QVCO) includes a first VCO; a second VCO; and a dynamic phase error correction circuit, having a plurality of coupling capacitors connected between the first and second VCOs, wherein the capacitances of the coupling capacitors are varied according to a digital control signal to correct a phase error of local oscillating (LO) signals of quadrature phases output by the first and second VCOs.