DISCRETE-ANALOGUE FILTER OF SECOND ORDER ON SWITCHED RESISTORS WITH TWO ELECTRONIC SWITCHES Russian patent published in 2024 - IPC H03H19/00 

FIELD: radio engineering.

SUBSTANCE: invention relates to radio engineering and can be used to select given signal spectra, for example, during their analogue-to-digital conversions. Result is provided due to the additional introduction of the first additional resistor connected in series to the first electronic switch, as well as due to the additional introduction of the second additional resistor connected in series to the second electronic switch, wherein the series-connected first electronic switch and the first additional resistor and the second electronic switch and the second additional resistor are connected between the output of the voltage follower and the inverting input of the differential operational amplifier, and the second frequency-setting capacitor is connected between the common unit of the series-connected first electronic switch and the second additional resistor and the common power supply bus.

EFFECT: providing frequency tuning by changing the duration of pulses that control electronic switches without changing their switching frequency, discrete-analogue filter on switched resistors, which at the second order of transfer function contains only two frequency-setting capacitors and two electronic switches.

1 cl, 7 dwg