Radio frequency high-Q value band-pass filter
A filter and value band technology, applied in the field of radio frequency analog integrated circuits, can solve the problems of large area, unfavorable integration and Q value, and high price
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[0015] The present invention will be further described below in conjunction with embodiment and accompanying drawing.
[0016] The radio frequency high-Q value band-pass filter in the present invention is a feedforward structure, including a main branch circuit, a feedforward branch circuit and a subtraction operation circuit. The main branch circuit is connected to a differential end of the subtraction circuit, and the feedforward branch circuit is connected to the other differential end of the subtraction circuit; the main branch circuit and the feedforward branch circuit have the same structure, both It is formed by connecting a radio frequency amplifier stage and a load stage, and the load stage is formed by connecting a switch mixer stage and a transimpedance stage, and the switch mixer stage is connected with a radio frequency amplifier stage; the main branch circuit and the feedforward branch circuit All circuits are connected to the differential end of the subtraction ...
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