A low noise amplifier and mobile terminal
A low-noise amplifier and mobile terminal technology, which is applied in improving amplifiers to reduce noise impact, telephone structure, branch office equipment, etc. It can solve the problem that LNA cannot support wide frequency bands, etc., and achieve the effect of reducing the amount of LNA and saving layout space
Active Publication Date: 2021-01-08
VIVO MOBILE COMM CO LTD
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Problems solved by technology
[0004] In view of the above problems, the purpose of the embodiments of the present invention is to provide a low noise amplifier and a mobile terminal to solve the problem that the LNA in the prior art cannot support a wide frequency band
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[0011] In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0012] refer to figure 1 , which shows a structural block diagram of an embodiment of a low noise amplifier of the present invention, the low noise amplifier is applied to a mobile terminal, for example, a mobile phone, a tablet computer, a personal digital assistant (PDA, Personal Digital Assistant), a vehicle computer or a navigator Wait. The low noise amplifier of the embodiment of the present invention may specifically include: a first preset number of input ports 10, a third preset number of output ports 20, a second preset number of mutually different matching circuits 30, an input matching circuit 40, The radio frequency amplification circuit 50, the output port selection circuit 60 and the controller 70, the first preset ...
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The invention provides a low noise amplifier and a mobile terminal. The low noise amplifier comprises a pre-set number of first input ports, a pre-set number of second mutually different matching circuits, a pre-set number of third output ports, an input matching circuit, a radio-frequency amplification circuit, an output port selection circuit and a controller; when receiving radio-frequency signals, the mobile terminal generates first control signals and second control signals according to the frequency of the radio-frequency signals, and controls the radio-frequency amplification circuit to be in a working state; according to the first control signals, the input matching circuit connects the input port for receiving the radio-frequency signals with the matching circuit corresponding to the frequency of the radio-frequency signals; the radio-frequency amplification circuit amplifies the matched radio-frequency signals, and outputs the amplified radio-frequency signals; and the output port selection circuit connects the radio-frequency amplification circuit with the output port corresponding to the frequency of the amplified radio-frequency signals according to the second control signals. By means of the low noise amplifier and the mobile terminal provided by the invention, wide-frequency-band radio-frequency signals can be supported; and the gain of the radio-frequency signals can be adjusted.
Description
technical field [0001] The present invention relates to the technical field of mobile terminals, in particular to a low noise amplifier and a mobile terminal. Background technique [0002] At present, mobile phone casings are developing toward metallization, and there are more and more mobile phone frequency bands, covering a range from 700MHz to 2700MHz, and the performance of mobile phone antennas will inevitably be relatively poor in some frequency bands. With the development of technology, supporting downlink CA (Carrier Aggregation, Carrier Aggregation technology) is already a standard configuration of mobile phones, but mobile phones that support CA need to add more radio frequency devices on the hardware link, such as quadruplexers and frequency dividers , power splitter, etc., the radio frequency hardware link is larger, so the radio frequency hardware link needs to add an external LNA (Low Noise Amplifier, low noise amplifier) to improve the sensitivity of the mob...
Claims
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IPC IPC(8): H03F1/26H04M1/02
CPCH03F1/26H04M1/0202
Inventor 林鉴杰
Owner VIVO MOBILE COMM CO LTD