Electrical impedance networks

Abstract

Abstract TWO PORT ELECTRICAL IMPEDANCE NETWORKS IN THE FORM OF A BRIDGE CIRCUIT HAVING OPPOSITE PAIRS OF ARMS, A FIRST PAIR OF WHICH EXHIBIT ELECTRICAL RESISTANCE AND THE OTHER PAIR FORMING, RESPECTIVELY, THE INPUT AND OUTPUT PORTS OF A HIGH GAIN AMPLIFIER. THE AMPLIFIER CAN BE A VOLTAGE OR CONTROLLED. NEGATIVE IMPEDANCE INVERTERS AND GYRATORS ARE CONTROLLED. NEGATIVE IMPEDANCE INVERTERS AND GYRATORS ARE DESCRIBED WHICH USE OPERATIONAL AMPLIFIERS, I. E. VOLTAGE CONTROLLED VOLTAGE SOURCES HAVING, IDEALLY, INFINITE INPUT IMPEDANCE AND ZERO OUTPUT IMPEDANCE. IN THE NEGATIVE IMPEDANCE INVERTERS, THE FIRST PAIR OF ARMS OF THE BRIDGE BOTH EXHIBIT POSITIVE ELECTICAL RESISTANCE AND IN THE GYRATORS ONE ARM OF THE FIRST PAIR OF ARMS EXHIBITS NEGATIVE RESISTANCE (E.G. BY USE OF A NEGATIVE IMPEDANCE CONVERTER) AND THE OTHER EXHIBITS POSITIVE RESISTANCE. THE USE OF THE GYRATORS TO CONVERT AN INDUCTANCE INTO A CAPACITANCE AND TO CONVERT A CAPACITANCE INTO AN INDUCTANCE IS DESCRIBED AND DIRECT-COUPLED GYRATORS HAVING VARYING QUALITY AND BANDWITH CAN BE PRODUCED USING COMMERCIALLY AVAILABLE INTEGRATED CIRCUITS.

Inventors

• 👤 Andreas Antoniou

Bibliographic Details