A Wideband Receiver Front-End Circuit With Continuously Adjustable Bandwidth
A wideband receiver and front-end circuit technology, applied in electrical components, transmission systems, etc., can solve problems such as hindering the commercialization process of multi-mode and multi-standard receivers, large intermediate frequency filter capacitors, and reducing chip yields, etc. Effective on-resistance, reducing the overall area, the effect of continuously variable bandwidth
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[0012] The present invention will be further explained below in conjunction with the accompanying drawings.
[0013] Such as figure 2 As shown, a broadband receiver front-end circuit with continuously adjustable bandwidth provided by the present invention includes a low noise amplifier, a main mixer, a transconductance stage circuit, a transimpedance amplifier, an output buffer stage circuit and a feedback loop, wherein, After the low noise amplifier preliminarily amplifies the radio frequency signal, the pre-amplified radio frequency signal is converted into an intermediate frequency voltage signal through the main mixer, and the intermediate frequency voltage signal is input into the feedback loop and the transconductance stage circuit respectively, and the transconductance stage circuit converts the The intermediate frequency voltage signal is converted into a current signal, and the current signal is converted into a voltage signal again through a transimpedance amplifier...
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