Negative impedance converter

Details Negative impedance converter Negative impedance converter

2006-02-28

2006-02-28

Jones, Stephen E. (Department: 2817)

Wave transmission lines and networks

Negative resistance or reactance networks of the active type

Having negative impedance

C333S213000, C330S085000

Reexamination Certificate

active

07005950

ABSTRACT:
There is provided a negative impedance converter, which has negative impedance conversion function by widening the available range of a generalized impedance converter. A generalized impedance converter is composed of two operational amplifiers Q1and Q2and four series-connected first to fifth impedance elements Z1to Z4. The four impedance elements included in the generalized impedance converter are all set as the same resistor R1, and an impedance element Z6is connected between the intermediate point B of the series-connected impedance elements and the ground. The magnitude of the impedance element Z6is set smaller than that of load impedance element Z5. By doing so, the input impedance Z11′becomes negative, and the kind of the impedance is determined depending on the kind of the impedance elements Z5and Z6.

REFERENCES:
patent: 4350964 (1982-09-01), Chambers, Jr.
“Realization of gyrators using operational amplifiers, and their use in RC-active-network synthesis”,A. Antoniou, PROC. IEE, vol. 116, No. 11, Nov., 1969, pp. 1838-1850 (13 sheets).

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