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System for reducing distortion in an electronic circuit using nonlinear feedback

A non-linear feedback, circuit technology, applied in improving amplifiers to reduce nonlinear distortion, negative feedback circuit layout, amplifiers with semiconductor devices/discharge tubes, etc., can solve the problems of reducing cellular user signal quality, interference, etc.

Inactive Publication Date: 2012-05-30
INDIAN INSTITUTE OF SCIENCE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Because the frequency bands are close together, distortion components may be introduced into adjacent frequency bands (i.e. ωB-ωC) and may cause interference or degrade the signal quality used by cellular users

Method used

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  • System for reducing distortion in an electronic circuit using nonlinear feedback
  • System for reducing distortion in an electronic circuit using nonlinear feedback
  • System for reducing distortion in an electronic circuit using nonlinear feedback

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Embodiment Construction

[0021] In the following detailed description, reference is made to the accompanying drawings which form a part hereof. In the drawings, similar symbols typically identify similar components, unless context dictates otherwise. The illustrative embodiments disclosed in the detailed description, drawings, and claims are not meant to be limiting. Other embodiments may be utilized, and other changes may be made, without departing from the spirit or scope of the subject matter presented here. It should be readily understood that the aspects of the invention generally described herein and illustrated in the accompanying drawings may be arranged, substituted, combined, separated and designed into various configurations, all of which are expressly noted herein.

[0022] Aspects of the invention include an electronic circuit that includes an amplifier with nonlinear feedback that reduces third harmonic distortion caused by nonlinear effects of the amplifier with little or no increase i...

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Abstract

System and methods for reducing third harmonic distortion produced by nonlinear amplifiers are disclosed. A system may include an amplifier circuit with an amplifier transistor such that the amplifier is capable of exhibiting an amplifier output signal containing third harmonic distortion. Further, a system may include a nonlinear feedback circuit with a first feedback transistor operating in Triode mode that produces a feedback electronic signal containing a feedback third harmonic component. In addition, the nonlinear feedback circuit may be configured to the amplifier circuit in negative feedback such that the feedback third harmonic component of the feedback electronic signal reduces the third harmonic distortion of the amplifier output signal. A system may also provide an output signal that has less third harmonic distortion than the amplifier output signal.

Description

Background technique [0001] Modern communication technologies require high performance electronic circuits to operate according to consumer or market demands. For example, communication applications (such as Asymmetric Subscriber Line (ADSL), cable modem, etc.) and video applications may be required to provide error-free or near-error-free data to end users with minimal delay. Typically, the electronic circuits used in these applications meet specifications with stringent requirements to perform these types of services. [0002] Similarly, communication applications delivering voice services (eg, cellular telephone service) may require a certain level of signal clarity. However, many radio frequency (RF) electronic circuits used in cellular telephone applications can cause distortion that degrades signal clarity and quality of service for cellular telephone applications. [0003] Many times, RF electronic circuits include transistors or other electronic devices that exhibit ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03F1/32
CPCH03F3/45197H03F1/3205H03F2203/45492H03F1/34H03F2203/45511H03F1/32
Inventor 巴拉德瓦杰·阿姆鲁图尔马杜苏登·斯里尼瓦桑珀瓦尼·普拉德普·K
Owner INDIAN INSTITUTE OF SCIENCE