Key coded high noise immunity radio controlled receiver - has receiver demodulator circuit partially divided into two channels and connected to AND:gate

摘要

The high noise immunity radio controlled receiver has a receiver demodulation section, to which a high freq. carrier wave which is amplitude modulated by a first coding signal, is applied. This coding signal is cyclic and of determined recurring frequency. The receiver uses a control section having a decoding sub-assembly which actuates an electromagnetic relay or similar. The receiver-demodulator section is partially divided into two channels. The first channel having a peak lopping circuit (4) and the second a selective filler (5), a demodulator circuit (6), a successive peak integrator circuit (7) and a trigger circuit (8). The outputs of the two channels being connected to the input of an 'AND' gate (9) whose output is connected to the input of the decoding sub assembly (11,12).