公开(公告)号：US20180191301A1

公开(公告)日：2018-07-05

申请号：US15860951

申请日：2018-01-03

Applicant: FCI INC.

Inventor： Jecheol MOON

IPC: H03B5/12

CPC classification number: H03B5/1228 ,  H03B5/1215 ,  H03B5/1218 ,  H03B5/1243 ,  H03B5/1296 ,  H03B19/00 ,  H03B2200/0074 ,  H03D7/1466

Abstract: A local oscillator generation system includes a first frequency divider configured to divide frequencies of a first voltage controlled oscillator signal and a second voltage controlled oscillator signal by 2, and output a first divided signal and a second divided signal; a mixer configured to mix the first voltage controlled oscillator signal, the second voltage controlled oscillator signal, the first divided signal, and the second divided signal, and output a first frequency mixed signal and a second frequency mixed signal; a transimpedance amplifier configured to amplify the first frequency mixed signal and the second frequency mixed signal, and output a first amplified signal and a second amplified signal; and a band-pass filter configured to filter the first amplified signal and the second amplified signal, and output a first filtered signal and a second amplified signal.

公开(公告)号：US20170331511A1

公开(公告)日：2017-11-16

申请号：US15594957

申请日：2017-05-15

Applicant: FCI INC.

Inventor： Heeyoung YOO ,  Jecheol MOON ,  Myungwoon HWANG

IPC: H04B1/48 ,  H01L27/02 ,  H02H9/04 ,  H03K17/687

CPC classification number: H04B1/48 ,  H01L27/0255 ,  H02H9/046 ,  H03K17/687

Abstract: A transceiver switch of a radio frequency transceiver is provided with a first diode and a second diode included in an electrostatic discharge circuit, which are connected in parallel along different directions to ground a positive (+) current or a negative (−) current generated from electrostatic charges. Another transceiver switch of a radio frequency transceiver is also provided with a resistor connected between a node connecting to an electrostatic discharge circuit and a ground terminal, to make the voltage of the node connecting to the electrostatic discharge circuit become a fixed DC potential connecting to the ground terminal.