公开(公告)号：US10686405B2

公开(公告)日：2020-06-16

申请号：US15784660

申请日：2017-10-16

Applicant: Samsung Electronics Co., Ltd. ,  Kwanyoung Oh

Inventor： Eun-seok Shin ,  Se-ra An ,  Jae-jin Park ,  Seung-hoon Lee ,  Do-hyung Kim ,  Min-young Kang

IPC: H03B1/04 ,  G01N29/44 ,  H03B5/36 ,  G01N29/24 ,  H03B5/32 ,  G01N29/32 ,  G01N29/02 ,  G01N29/036 ,  H03B5/24 ,  H03H9/02 ,  H03K21/02

Abstract: A resonator oscillator that may be included in a gas sensing system may include an oscillator that may be electrically connected to an external resonator through a conductive line. The oscillator may generate an oscillating signal having a frequency corresponding to a resonance frequency of the external resonator in an oscillating path. A spurious resonance removal circuit on the oscillating path may remove spurious resonance caused by the conductive line from the oscillating path. A gas sensing system may include the oscillator, a resonator that includes a sensor configured to sense a gas, and a frequency counting logic that receives the oscillating signal and a reference clock signal, performs a counting operation on the oscillating signal according to a logic state of the reference clock signal to generate a counted value, and generate a gas sensing output indicating a sensed gas based on the counted value.

公开(公告)号：US10992290B2

公开(公告)日：2021-04-27

申请号：US16734721

申请日：2020-01-06

Applicant: Samsung Electronics Co., Ltd.

Inventor： Yong-min Kim ,  Kyung-hoon Lee ,  Eun-seok Shin ,  Michael Choi

IPC: H03K19/0175 ,  H03K3/037 ,  G09G3/3258 ,  H03K19/0185

Abstract: A level shifter for outputting an output voltage having a voltage level range different from a voltage level range of a received input voltage is disclosed. The level shifter includes: a current mirror configured to copy a reference current flowing through a first mirror transistor to a second mirror transistor; a current mirror control circuit electrically connected to the current mirror by a sink node and including a plurality of control transistors configured to control the current mirror; and an output circuit configured to output an output voltage based on a voltage level of the sink node, wherein a first control transistor of the plurality of control transistors receives the output voltage fed back to a gate terminal of the first control transistor, and a second control transistor of the plurality of control transistors receives an inverted output voltage fed back to a gate terminal of the second control transistor.