公开(公告)号：US09806720B1

公开(公告)日：2017-10-31

申请号：US15288379

申请日：2016-10-07

Applicant: Analog Devices Global

Inventor： Bilal Tarik Cavus ,  Ozgun Serttek ,  Mehmet Bati

IPC: H03K19/20 ,  H01L27/06 ,  H03K19/0948 ,  H03K5/24

CPC classification number: H03K19/20 ,  H01L27/0605 ,  H01L27/0629 ,  H03K5/2481 ,  H03K19/0948

Abstract: An inverter based on a compound semiconductor uses a depletion mode transistor as the pull-up device, and a current source to bias the pull-up device. The current source is electrically coupled to a source terminal of the pull-up device. As a result, the current source continues to conduct current through the pull-up device, whether the inverter output is high or low, to ensure rapid response of the inverter.

公开(公告)号：US09712158B1

公开(公告)日：2017-07-18

申请号：US15092975

申请日：2016-04-07

Applicant: ANALOG DEVICES GLOBAL

Inventor： Bilal Tarik Cavus ,  Ozgun Serttek

IPC: H03K17/687 ,  H03K17/06

CPC classification number: H03K17/687 ,  H03K17/063 ,  H03K17/6871 ,  H03K17/693

Abstract: Apparatus and methods for biasing radio frequency (RF) switches are provided herein. In certain configurations, an RF switching circuit includes a field effect transistor (FET) switch electrically connected between a first terminal and a second terminal, and an adaptive biasing circuit that generates a bias voltage used in part to bias a gate of the FET switch. The adaptive biasing circuit includes a low pass filter that generates a low pass filtered voltage based on low pass filtering a voltage of the first terminal, a buffer circuit that receives the low pass filtered voltage and generates a buffered voltage, and a voltage shifting circuit that generates the bias voltage by shifting the buffered voltage by an amount of voltage that depends on a state of a switch control signal.