DUAL CHANNEL HARMONIC SWITCH Russian patent published in 2021 - IPC G01R27/28 

FIELD: electrical measuring equipment.

SUBSTANCE: invention relates to electrical measuring equipment and can be used in electrical meters for phase shifts. The invention is a two-channel switch of harmonic signals containing a discriminator in each channel, the input of which is connected to the input bus, and the output to the first input of the "AND" element, the output of which is connected to the input of the counting trigger, the single output of which is connected to the control input of the key of this channel , and the information inputs of the keys are connected to the corresponding input buses, and the outputs are combined and connected to the output bus, a microcontroller is added, the third and fourth "AND" elements, the first signal inputs of which are connected to the outputs of the discriminators, respectively, of the first and second channel, while the second signal inputs of these "AND" elements are connected to the first and second, respectively control outputs of the microcontroller.

EFFECT: extension of the frequency range of the switch of harmonic signals.

1 cl, 2 dwg