公开(公告)号：US20190123757A1

公开(公告)日：2019-04-25

申请号：US16158948

申请日：2018-10-12

申请人： Realtek Semiconductor Corp.

发明人： Chih-Lung CHEN ,  Shih-Hsiung HUANG ,  Chien-Ming WU ,  Jie-Fan LAI

IPC分类号： H03M1/44 ,  H03M1/12

CPC分类号： H03M1/442 ,  H03M1/1245 ,  H03M1/164

摘要： A pipelined analog-to-digital converter includes: a first switched capacitor network, a first digital-to-analog converter, a second switched capacitor network, a second digital-to-analog converter, and an operational amplifier. The outputs from the first switched capacitor network and the first digital-to-analog converter form a first subtraction signal. The outputs from the second switched capacitor network and the second digital-to-analog converter form a second subtraction signal. The operational amplifier is arranged to operably generate an output signal based on the first subtraction signal or the second subtraction signal, and to operably switch coupling relationship of multiple candidate capacitors of the operational amplifier based on the magnitude of an input signal of a prior stage circuit, so that only a portion of the multiple candidate capacitors could be participated in the generation of the output signal at a time.

公开(公告)号：US20190123756A1

公开(公告)日：2019-04-25

申请号：US16158916

申请日：2018-10-12

申请人： Realtek Semiconductor Corp.

发明人： Shih-Hsiung HUANG ,  Chih-Lung CHEN ,  Jie-Fan LAI ,  Chien-Ming WU

IPC分类号： H03M1/44 ,  H03M1/12

CPC分类号： H03M1/442 ,  G11C27/026 ,  H03M1/0695 ,  H03M1/1245 ,  H03M1/164

摘要： A sample-and-hold amplifier includes: a switched capacitor network for conducting a sample -and-hold operation on an input signal to generate a first signal; and an operational amplifier coupled with the switched capacitor network and including multiple candidate capacitors; wherein the operational amplifier is arranged to operably generate an output signal based on the first signal, and to operably switch coupling relationship of the multiple candidate capacitors based on the magnitude of the input signal, so that only a portion of the multiple candidate capacitors could be participated in the generation of the output signal at a time.

公开(公告)号：US20190123755A1

公开(公告)日：2019-04-25

申请号：US16158740

申请日：2018-10-12

申请人： Realtek Semiconductor Corp.

发明人： Jie-Fan LAI ,  Chih-Lung CHEN ,  Shih-Hsiung HUANG ,  Chien-Ming WU

IPC分类号： H03M1/44 ,  H03M1/06 ,  H03M1/12

CPC分类号： H03M1/442 ,  H03F3/005 ,  H03M1/0695 ,  H03M1/1245 ,  H03M1/164

摘要： An operational amplifier includes: a first gain stage for generating a second signal based on a first signal transmitted from a prior stage circuit; a second gain stage for generating an output signal based on the second signal; multiple candidate capacitors; and a capacitor selection circuit for switching the coupling relationship of the multiple candidate capacitors based on the magnitude of an input signal of the prior stage circuit, so that only a portion of the multiple candidate capacitors could be coupled to the second gain stage at a time.