In receivers, direct amplification detector stage is often performed by the regenerative circuit that provides a significant signal amplification and a louder reception. In the grid circuit lamp detection is carried out. In the anode circuit includes an inductor La, associated with the coil of the grid circuit LK, which is called the coil feedback.
The principle of regeneration is as follows. High-frequency component of the anode current flowing through the coil La, is induced in the coil circuit LK alternating voltage.This voltage is summed with the voltage of the incoming signal. The amplitude of the stress acting on the grid lamp increases. Change the anode current becomes deeper, ie, increases and the amplitude of the variable component of the anode current.
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