Negative immittance converter

Details Negative immittance converter Negative immittance converter

1988-10-27

1989-10-10

Gensler, Paul

Wave transmission lines and networks

Negative resistance or reactance networks of the active type

Having negative impedance

379346, H03H 1144

Patent

active

048735027

ABSTRACT:
A negative admittance converter or a negative impedance converter can be formed from a negative immitance converter having two preferably identical transformers each having a center tapped coil and respective coil end terminals. One end of each of the coils is connected through a first amplifier element, and the other ends are connected through a second amplifier element, the amplifier elements having control inputs connected to a 180.degree. phase shifter. The phase shifter is formed by a voltage differential amplifier having one input connected to a voltage divider connected across the first amplifier element, and the other input connected to a voltage divider connected across the other amplifier element, the amplifier differential outputs being connected to the control inputs of the first and second amplifier elements.

REFERENCES:
patent: 3024324 (1962-03-01), Dimmer
patent: 3912878 (1975-10-01), Levi

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