Active filter, the third order, a ω adjustable of independent, and other objects and advantages of the filter

摘要

P the invention relates to an active filter passes - bottom of the third order. / p & & p & this filter comprises a cell t, r 1, r2, c1, connected to an input of an operational amplifier a, through a resistor r3, a capacitor c 2 of the other hand, - reaction, a capacitor c3 in parallel to the input of a, and a resistor / p & & p & r4 in parallel on capacitor c1 of the cell by t. the active filter, which may advantageously be made in hybrid technology, and whose parameters can be adjusted independently by adjusting, in succession, r3, r2, the gain of a, and r4 and r1, can be used as a filter of modulation or demodulation in a device for transmitting and receiving coded pulses, etc.... / p