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Gain control linearity in rf driver amplifier transmitter

A technology of amplifier gain and control table, applied in the direction of amplification control, amplifier, gated amplifier, etc., can solve problems such as insufficient reliability

Inactive Publication Date: 2016-09-14
QUALCOMM INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Unfortunately, transistors such as MOSFETs used in current driver amplifiers for wireless devices often provide non-linear performance and insufficient reliability

Method used

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  • Gain control linearity in rf driver amplifier transmitter
  • Gain control linearity in rf driver amplifier transmitter
  • Gain control linearity in rf driver amplifier transmitter

Examples

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Embodiment Construction

[0011] The word "exemplary" is used herein to mean "serving as an example, instance, or illustration." Any embodiment described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments.

[0012] The embodiments set forth below in conjunction with the accompanying drawings are intended as descriptions of exemplary embodiments of the present invention and are not intended to represent the only embodiments in which the present invention may be practiced. The term "exemplary" is used throughout this description to mean "serving as an example, instance, or illustration" and should not necessarily be construed as preferred or advantageous over other exemplary embodiments. The embodiments include specific details for the purpose of providing a thorough understanding of exemplary embodiments of the invention. It will be apparent to those skilled in the art that the exemplary embodiments of the invention may be practiced without thes...

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Abstract

An exemplary device is disclosed that includes a plurality of voltage-to-current converters and a cascode stage for converting an input signal voltage into a plurality of input signal currents. The cascode stage is coupled to the voltage-to-current converter to provide amplifier gain control. The cascode stage includes thin gate oxide transistors and thick gate oxide transistors.

Description

[0001] Priority under 35 U.S.C. § 119 [0002] This patent application claims priority to Provisional Application No. 61 / 222,061, filed June 30, 2009, entitled "TC DALINEARITY IMPROVEMENT," and said application is assigned to the present assignee , and is expressly incorporated herein by reference. technical field Background technique [0003] Amplifiers are commonly used in various electronic devices to provide signal amplification. Different types of amplifiers are used for different purposes. For example, a wireless communication device such as a cellular telephone may include a transmitter and receiver for two-way communication. The transmitter can utilize a driver amplifier (DA) and power amplifier (PA), the receiver can utilize a low noise amplifier (LNA), and the transmitter and receiver can utilize a variable gain amplifier (VGA). [0004] To reduce cost and improve integration, metal oxide semiconductor field effect transistors (MOSFETs) are often used in radio ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03G1/00H03F3/72
CPCH03F1/223H03F3/195H03F3/245H03F3/72H03F2203/7206H03F2203/7236H03G1/0029H03G1/0088
Inventor 德沃拉塔·V·戈德博尔
Owner QUALCOMM INC