Electrical transmission or interconnection systems – Nonlinear reactor systems – Parametrons
Patent
1993-08-05
1994-05-31
Callahan, Timothy P.
Electrical transmission or interconnection systems
Nonlinear reactor systems
Parametrons
328 55, 307262, H03K 500, H03K 513
Patent
active
053172760
ABSTRACT:
A phase shifter receiving an input signal and producing two output signals having a 90.degree. phase difference from each other includes first and second input nodes for respectively receiving first and second signals having opposite phases; a first serial connection of a first resistor and a second resistor at a resistor node, the first and second resistors having the same resistance values, a first end of the first serial connection being connected to the first input node; a second serial connection of a first capacitor and a second capacitor at a capacitor node, the first and second capacitors having the same capacitance values, the second serial connection being connected between the second end of the first serial connection and the second input node; and first and second output nodes respectively connected to the resistor node and the capacitor node, producing output signals having a 90.degree. phase difference from each other. Output voltages having phases orthogonal to each other can be produced by a single current path with amplitude characteristics similar to those of the conventional 0.degree./90.degree. phase shifter using differential circuits and integrating circuits. The orthogonality is maintained over a wide frequency band as in a conventional phase shifter.
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Callahan Timothy P.
Lam Tuan T.
Mitsubishi Denki & Kabushiki Kaisha
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