Single amplifier network for simulating an FDNR circuit

Details Single amplifier network for simulating an FDNR circuit Single amplifier network for simulating an FDNR circuit

1975-12-24

1976-12-07

Dixon, Harold A.

Wave transmission lines and networks

Attenuators

333 80T, H03H 744

Patent

active

039965384

ABSTRACT:
The series combination of an FDNR and a resistor is simulated across a pair of terminals of a one-port network which includes a single differential input operational amplifier. One terminal of the network is connected through a first resistor and a second resistor to associated first and second differential inputs of the amplifier. The output of the amplifier is connected through a third resistor to the first input of the amplifier, through the series combination of a first capacitor and a fourth resistor to the second input of the amplifier; and through the series combination of the third resistor and a fifth resistor to the other terminal of the network which is connected to ground. This other terminal is also connected through a second capacitor to the second input of the amplifier. With the capacitances of the capacitors normalized to unity, the product of the normalized resistances of the second and fifth resistors being equal to the product of the normalized resistances of the first and fourth resistors, and the normalized resistances of the third and fifth resistors being the same value, the impedance presented across the one port of the network corresponds to that of an FDNR in series with a resistor.

REFERENCES:
patent: 2968773 (1961-01-01), Sandberg
patent: 3219952 (1965-11-01), Saraga
patent: 3831117 (1974-08-01), Fletcher
patent: 3895309 (1975-07-01), Rollett et al.

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