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Low-noise amplifier, and method of amplifying single-ended input signal to differential output single by using low-noise amplifier

A low-noise amplifier and signal technology, applied in the direction of low-noise amplifiers, amplifiers, amplifier types, etc., can solve the problems of increasing receiver size, complexity and price, and limited bandwidth of matchers

Active Publication Date: 2015-07-22
XUESHAN TECH INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this solution not only increases the size, complexity and price of the receiver, but also the bandwidth of most matchers is quite limited

Method used

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  • Low-noise amplifier, and method of amplifying single-ended input signal to differential output single by using low-noise amplifier
  • Low-noise amplifier, and method of amplifying single-ended input signal to differential output single by using low-noise amplifier
  • Low-noise amplifier, and method of amplifying single-ended input signal to differential output single by using low-noise amplifier

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Embodiment Construction

[0048] The following embodiments and related drawings can fully illustrate the inventive concepts of the present application. Similar element numbers in the various figures correspond to similar functions or elements. It should be noted that the term "invention" here is used to refer to the inventive concepts presented in these embodiments, but its scope is not limited to the embodiments themselves. In addition, the mathematical expressions in this disclosure are used to illustrate the principles and logics related to the embodiments of the present invention, and do not limit the scope of the present invention unless otherwise specified. Those with ordinary knowledge in the technical field of the present invention can understand that there are a variety of technologies to realize the physical representations corresponding to these mathematical formulas.

[0049] The technology provided by the present invention is used in a radio frequency receiver to receive a single-ended in...

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Abstract

A low-noise amplifier accepts a single-ended input signal at an input port and provides a differential output signal at an output port. Each of a pair of transistors in the amplifier has a pair of input terminals and a pair of output terminals that share a common terminal. A feedback circuit is electrically connected between the non-common output terminal and the non-common input terminal of a closed-loop one of the transistors and is electrically disconnected from any two terminals of an open-loop one of the transistors. The input port has a signal-carrying input terminal electrically connected to the non-common input terminal of both of the transistors and a ground terminal. The output port has a positive terminal electrically connected to the common terminal of the open-loop transistor and a negative terminal electrically connected to non-common output terminal of the closed-loop transistor.

Description

technical field [0001] The present invention relates to low noise amplifiers in radio frequency communication devices. Background technique [0002] In an RF receiver, the LNA is often the first loop in the overall signal processing procedure. The information bearing signal arriving at the input of the low noise amplifier is usually weak and corrupted by noise. A good LNA should boost the energy of the input signal and minimize the negative effects of the amplifier on the amplified signal, such as noise and distortion due to the amplifier. Therefore, in addition to properties such as linear gain, stability, and impedance matching in the operating frequency band, a good LNA should also have a low noise figure (NF), and high intermodulation and compression points. [0003] The front end of the receive chain is often connected to an unbalanced grounded signal transmission line, causing interface problems with RF receivers using differential signaling architectures. In a diff...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03F3/45
CPCH03F3/193H03F1/223H03F1/342H03F3/211H03F3/72H03F2200/156H03F2200/294H03F2200/321H03F2203/7227H03F2200/09
Inventor 白洪全
Owner XUESHAN TECH INC
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