公开(公告)号：US20180069520A1

公开(公告)日：2018-03-08

申请号：US15602532

申请日：2017-05-23

Applicant: Samsung Electronics Co., Ltd.

Inventor： Quochoang DUONG ,  Yus KO ,  Jeongwoon KONG ,  Hyunseok SHIN

IPC: H03G3/30 ,  H03F3/45

CPC classification number: H03G3/3089 ,  H03F1/3211 ,  H03F3/45 ,  H03F3/45071 ,  H03F3/45183 ,  H03F3/45475 ,  H03F2203/45022 ,  H03F2203/45116 ,  H03F2203/45522 ,  H03F2203/45528 ,  H03F2203/45538 ,  H03F2203/45591 ,  H03F2203/45594 ,  H03G1/0023 ,  H03G1/0088 ,  H03G3/001

Abstract: The inventive concepts relate to variable gain amplifiers. The variable gain amplifier including an amplifier, a first fixed resistor and a first variable resistor, a second fixed resistor and a second variable resistor, a third fixed resistor and a third variable resistor, a fourth fixed resistor and a fourth variable resistor, a first output terminal and a second output terminal, and a decoder may be provided. The decoder is configured to receive first control bits, generate second control bits from the first control bits, generate third and fourth control bits from the first or second control bits, respectively, transmit the first control bits and the third control bits to the third and fourth variable resistors to adjust resistance values, and transmit the second and fourth control bits to first and second variable resistors to adjust resistance values.