CIRCUIT FORMING ACTIVE FILTER R.C. FOR BAND-CUT OR PASS-BUTT APPLICATION

摘要

P Circuit forming an active RC filter for band-pass or all-pass application in the high and microwave domains, with a biquadratic transfer function, comprising a chain comprising a block F for carrying out a filter and amplifier function, and comprising a block S3 for summing VS between the output signal of the string and the signal VE applied to the input E of the circuit, characterized in that the string further comprises an amplifier block A2 in series with the filter-amplifier block F , placed between the output SF of the latter and the output of the chain, in that the input signal VE is applied to the summing unit through an amplifier A1, and in that the summing block S3 is formed by the coupling outputs of the amplifier blocks A1 and A2 to form the output S of the circuit on which the output signal VS is available. The filter-amplifier block F being an active circuit BP bandpass of order 2. / P P Application: active microwave notch filters or pass all. / P