Invention Grant
- Patent Title: Voltage variable attenuator, an integrated circuit and a method of attenuation
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Application No.: US15380358Application Date: 2016-12-15
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Publication No.: US10103712B2Publication Date: 2018-10-16
- Inventor: Ahmed Mohammad Ashry Othman , Mohamed Moussa Ramadan Esmael
- Applicant: ANALOG DEVICES GLOBAL
- Applicant Address: BM Hamilton
- Assignee: Analog Devices Global
- Current Assignee: Analog Devices Global
- Current Assignee Address: BM Hamilton
- Agency: Knobbe Martens Olson & Bear LLP
- Main IPC: H03H11/24
- IPC: H03H11/24 ; H03H11/30 ; H03H21/00 ; H03K19/0175

Abstract:
The present disclosure provides a voltage variable attenuator (VVA) with a controllable matching network. The output of the attenuation portion of the VVA is couple to a matching network. The matching network includes a resistive element, which may be a Field Effect Transistor (FET), whose resistance may be controlled as a function of attenuation. In particular, a control voltage used to control the resistance of the attenuation portion of the VVA is also used to control the resistive element of the matching network. In this manner, the output impedance of the VVA may be maintained at a desired level.
Public/Granted literature
- US20180175828A1 VOLTAGE VARIABLE ATTENUATOR, AN INTEGRATED CIRCUIT AND A METHOD OF ATTENUATION Public/Granted day:2018-06-21
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