Super regeneration:
Super-regenerative and super-heterodyne circuits have their own advantages and disadvantages. The super-regenerating receiver is low-cost, economical, and has high receiving sensitivity. However, the disadvantages are also obvious, that is, the frequency is subject to large temperature drift and poor anti-interference ability. Superheterodyne Receiver has the advantages of stable frequency, good anti-interference ability, and stable performance when matched with MCU. The disadvantage is that the sensitivity is lower than super regeneration, the price is much higher than that of super regenerative receiver, and there may be obstruction when the signal is strong at close range. phenomenon.
superheterodyne:
A circuit that frequency-converts an input signal to a predetermined frequency by mixing a locally generated oscillatory wave with an input signal. The method of superheterodyne is adapted to the needs of high-frequency and weak-signal reception in long-distance communication, and has been developed based on the principle of heterodyne. The heterodyne method converts the input signal frequency to audio. This method converts the input signal to super audio, so it is called superheterodyne. Superheterodyne receiver is a typical application of super-heterodyne circuit, its advantages are: 1 easy to get large enough and relatively stable amplification. 2 has a higher selectivity and better frequency characteristics. 3 easy to adjust. The disadvantage is that the circuit is more complex and there are some special interferences, such as image frequency interference, combined frequency interference and intermediate frequency interference.