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.

公开(公告)号：US20180062509A1

公开(公告)日：2018-03-01

申请号：US15469713

申请日：2017-03-27

Applicant: Samsung Electronics Co., Ltd.

Inventor： Quoc hoang DUONG ,  Yus KO ,  Pan-jong KIM ,  Hyun-seok SHIN ,  Jeong-woon KONG

IPC: H02M3/156 ,  H02M1/08

CPC classification number: H02M3/156 ,  H02M1/08 ,  H02M2001/0009

Abstract: A control circuit in a switching regulator, the switching regulator including an inductor and a switching circuit configured to control a current passing through the inductor in response to a control signal, the control circuit configured to receive a feedback voltage of an output voltage of the switching regulator and receive the current passing through the inductor as a current sensing signal. The control circuit includes a first internal signal generator configured to generate a first internal signal based on the feedback voltage and a reference voltage, a second internal signal generator configured to generate a second internal signal based on the current sensing signal such that a base level of the second internal signal varies according to the feedback voltage and the reference voltage, and a comparator configured to output the control signal based on the first and second internal signals.