Wave transmission lines and networks – Negative resistance or reactance networks of the active type – Simulating specific type of reactance
Patent
1992-04-28
1993-10-05
Mullins, James B.
Wave transmission lines and networks
Negative resistance or reactance networks of the active type
Simulating specific type of reactance
307520, 330306, H03H 1100
Patent
active
052509176
ABSTRACT:
An equivalent inductance circuit includes a feedback type integration circuit and a differential amplifying circuit. An input signal applied to an input terminal is integrated by the feed-back type integration circuit and, a signal according to a difference component between an integrated output signal and the input signal is outputted by the differential amplifying circuit. By feeding the difference signal back to the input terminal, an input impedance equivalently represents an inductance characteristic. Such equivalent inductance can be changed by a current from a variable current source which supplies the current to the differential amplifying circuit and, a change of the equivalent inductance shows an inverse proportional manner.
REFERENCES:
patent: 3792367 (1974-02-01), Fleischer et al.
patent: 4318054 (1982-03-01), Yokoyama
patent: 5124592 (1992-06-01), Hagino
Nandi, "New Ideal Active Inductance and Frequency-Dependent Negative Resistance Using D.V.C.C.S./D.V.C.V.S. Applications in Sinusoidal-Oscillator Realization", Electronics Letters, vol. 14, No. 17, Aug. 17, 1978, pp. 551-553.
Honda Fumiaki
Hosoya Nobukazu
Mullins James B.
Sanyo Electric Co,. Ltd.
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