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Low-noise amplifier

A technology of amplifiers and coils, which is applied in the direction of improving amplifiers to reduce noise effects, and can solve problems such as wrong demodulation results of demodulators

Active Publication Date: 2014-02-12
REALTEK SEMICON CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

If too much noise is brought into the wireless signal during the process of amplifying the wireless signal, it will cause the demodulator to produce wrong demodulation results

Method used

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Embodiment Construction

[0014] Certain terms are used throughout the specification and patent claims to refer to particular elements. Those skilled in the art should understand that hardware manufacturers may use different terms to refer to the same component. The scope of this specification and subsequent patent claims does not use the difference in name as the way to distinguish components, but the difference in function of the components as the criterion for distinguishing. "Includes" mentioned throughout the specification and claims is an open term, so it should be interpreted as "including but not limited to". In addition, the term "coupled" here includes any direct and indirect electrical connection means, therefore, if it is described in the text that a first device is coupled to a second device, it means that the first device can be directly electrically connected to the second device. The second device, or indirectly electrically connected to the second device through other devices or conne...

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Abstract

The invention discloses a low-noise amplifier which comprises a transformer and a first-stage gain circuit, wherein the transformer is provided with a primary coil and a secondary coil, and the primary coil is used for receiving an input signal. The first-stage gain circuit is provided with a first input port which is coupled to the primary coil, and the first-stage gain circuit is used for proving grain to the input signal to generate first output.

Description

technical field [0001] The invention relates to the field of wireless communication, in particular to a low noise amplifier used in a receiver. Background technique [0002] In a wireless communication system, the receiver needs to amplify the wireless signal received from the antenna through a low noise amplifier (LNA), so as to be demodulated by a subsequent demodulator. There are many aspects that must be considered in the design of low-noise amplifiers, especially the self-induced noise. If too much noise is brought into the wireless signal during the process of amplifying the wireless signal, it will cause the demodulator to generate wrong demodulation results. That is to say, the low noise amplifier must have a sufficiently low noise figure in design to ensure the correctness of data transmission. On the other hand, under the trend of miniaturization of integrated circuits, the design of the low noise amplifier must also consider how to optimize the performance of th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03F1/26
Inventor 陈宪谷张家润陈家源林盈熙
Owner REALTEK SEMICON CORP