Wideband low-noise amplifier

A wide-band low-noise, amplifier technology, applied in the direction of improving the amplifier to reduce the impact of noise, can solve the problem that the wide-band low-noise amplifier cannot be adjusted, and achieve the effect of increasing the gain and reducing the noise figure

Active Publication Date: 2014-07-23
SOI MICRO CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of this, the present invention provides a broadband low-noise amplifier to solve the problem that the broadband low-noise amplifier in the prior art cannot be adjusted after the circuit is made

Method used

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Embodiment 1

[0044] The embodiment of the present invention discloses a broadband low noise amplifier, such as figure 1 As shown, it includes a broadband low noise amplifier 1 and an electric adjustment circuit 2, and the signal input terminal RF of the electric adjustment circuit 2 and the broadband low noise amplifier 1 in connected, the electric adjustment circuit 2 includes a transistor M 1 , transistor M 1 The output terminal of the wideband low noise amplifier 1 and the signal input terminal RF in connected, the transistor M 1 The input terminal is connected to its control terminal and receives an external control voltage V Ctrl .

[0045] It should be noted that this embodiment does not limit the specific model of the broadband low-noise amplifier and its specific internal structure, as long as the input impedance of the broadband low-noise amplifier can be adjusted by adjusting the control voltage received by the electric adjustment circuit, then the Broadband low noise amplif...

Embodiment 2

[0049] This embodiment is more specific than the previous embodiment. The broadband low noise amplifier includes a broadband low noise amplifier, an electric adjustment circuit, and a source feedback circuit.

[0050] The parallel feedback two-stage radio frequency amplifier includes a second transistor, a third transistor, a fourth transistor, a second resistor, a third resistor, a fourth resistor and a fifth resistor.

[0051] The control end of the second transistor is connected with the output end of the first transistor, as the signal input end of the two-stage radio frequency amplifier; the control end of the second transistor is connected with one end of the second resistor, and the second resistor The other end of the fifth resistor is connected to one end of the fifth resistor at the same time, and the other end of the fifth resistor is connected to the output end of the fourth transistor; the common end of the second resistor and the fifth resistor is connected to the...

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Abstract

The invention provides a wideband low-noise amplifier which comprises an electronic speed controller circuit connected with the signal input end of the wideband low-noise amplifier. The electronic speed controller circuit comprises a first transistor, the output end of the first transistor is connected with the signal input end of the wideband low-noise amplifier, and the input end of the first transistor is connected with the control end and receives control voltages. According to the wideband low-noise amplifier, the electronic speed controller circuit is connected with the signal input end of the wideband low-noise amplifier, and by changing the magnitude of control voltages received by the electronic speed controller circuit, adjusting an input matching circuit of the wideband low-noise amplifier and controlling input impedance of the wideband low-noise amplifier, the noise coefficient of the wideband low-noise amplifier is lowered, gain of the wideband low-noise amplifier is improved, and the effect that the wideband low-noise amplifier can still be adjusted after the circuit is manufactured is achieved.

Description

technical field [0001] The invention relates to the technical field of communication, and more specifically relates to a broadband low-noise amplifier. Background technique [0002] Low-Noise Amplifier (LNA), as a key module in the front-end of radio frequency, is a basic component in communication system equipment, and a broadband low-noise amplifier is a key component of transceiver chips and down-conversion chips. At present, traditional broadband LNAs are mainly realized by balanced, distributed or capacitive-inductive matching, but due to their large size and high power consumption, it is difficult to meet the requirements of the development of modern wireless communication systems. [0003] With the rapid development of monolithic microwave integrated circuit (Monolithic Microwave Integrated Circuit, referred to as MMIC) technology, a radio frequency monolithic broadband low noise amplifier has appeared. The radio frequency monolithic broadband low noise amplifier is a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03F1/26
Inventor 牟鹏飞杨洪文阎跃鹏
Owner SOI MICRO CO LTD
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