DISCRETE-ANALOGUE SECOND-ORDER LOW-PASS FILTER WITH THREE FREQUENCY-SETTING CAPACITORS 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. In the discrete-analogue filter (DAF), the series-connected first and third electronic switches are connected between the output of the non-inverting voltage follower and the inverting input of the differential operational amplifier, and the common unit of the first and third electronic switches is connected to the common power supply bus through the first frequency-setting capacitor and through the series-connected second electronic switch, and second frequency-setting capacitor is connected to common bus of power supplies.

EFFECT: creation of a discrete-analogue low-frequency filter (DAF) on switched capacitors, in which there is a possibility of setting the pole frequency by changing the capacitance of only one switched capacitor.

1 cl, 7 dwg