Design method for superheterodyne receiving channel common basic modules

Abstract

The invention discloses a design method for superheterodyne receiving channel common basic modules, and the method can effectively reduce the overall implementation difficulty and development time ofa receiving channel. The method is implemented through the following technical scheme that the method comprises the steps: designing three types of common basic modules: pre-selection modules, frequency conversion modules and intermediate frequency modules; carrying out the serialized development of three common basic module circuits, and forming a common basic module series of a pre-selection module 1, a pre-selection module 2, ... and a pre-selection module X, a frequency conversion module 1, a frequency conversion module 2, ... and a frequency conversion module Y, an intermediate frequencymodule 1, an intermediate frequency module 2, ... and an intermediate frequency module Z; Selecting a corresponding module series according to an existing common basic module product during the designof a superheterodyne receiving channel, and respectively selecting the proper pre-selection modules, frequency conversion modules and intermediate frequency modules for splicing and combination; forming a complete superheterodyne receiving channel through the above common basic modules, and achieving the quick design of the superheterodyne receiving channel.

Description

technical field [0001] The invention relates to a superheterodyne receiving channel widely used in monitoring receivers, search receivers and the like. A method for designing and developing a superheterodyne receiving channel is realized through the serialized development of the common basic module of the receiving channel. Background technique [0002] The superheterodyne receiver is named for its superheterodyne receiving method. The so-called superheterodyne method is that in the receiver, the local oscillator signal and the received external signal are mixed in the mixer to generate an intermediate frequency signal whose modulation law is associated with the received external signal. The reception of external signals is a mixing process. In this process, the input signal received by the antenna is mixed by the receiving channel to obtain an intermediate frequency signal, which is amplified and sent to the demodulator. The superheterodyne reception method can easily rea...

AI Technical Summary

Problems solved by technology

Although the superheterodyne receiving channels in different receivers have great differences, their basic structure and process are the same

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