Electricity: power supply or regulation systems – Output level responsive – Using a three or more terminal semiconductive device as the...
Patent
1992-09-08
1994-02-01
Sterrett, Jeffrey
Electricity: power supply or regulation systems
Output level responsive
Using a three or more terminal semiconductive device as the...
323273, G05F 1575
Patent
active
052835146
ABSTRACT:
A current regulating, transconductance amplifier is connected to the load capacitor of a backplane system. The load capacitor is connected close to the load inside the feedback loop of the regulating amplifier. The frequency response shaping networks of the amplifier are designed to include the pole and zero, contributed by this capacitor, to meet the criteria for fast settling of a current step at the load. At least in the location of the load capacitor and the current feedback paths between each sense point and the transconductance amplifier of the regulator the dielectric thickness of the dielectric material is made as thin as possible, consistent with manufacturability and voltage breakdown (currently on the order of seven mils thick), and the current paths between the transconductance amplifier and each of the sense points (for detecting changes in load current) are made parallel to one another on opposite sides of the dielectric material so that the current in the two paths follow equal and opposite parallel directions. This results in the interaction of the electromagnetic fields created by the two currents drawn at the sense points so that they cancel one another so as to reduce the parasitic impedance of these current paths.
REFERENCES:
patent: 4912423 (1990-03-01), Milkovic et al.
patent: 4952867 (1990-08-01), Anderson et al.
patent: 5177431 (1993-01-01), Smith et al.
patent: 5194802 (1993-03-01), Hill et al.
Application Note #6, TachoMOD Demonstration Board, Vicor Corporation, Andover, Massachusetts (Jul. 1991).
Jay Prager, "Beyond Distributed Power," Vicor Corporation, Andover, Mass. (Dec. 21, 1990).
Dai Xioa-Wei
Hayward C. Michael
Hybricon Corporation
Sterrett Jeffrey
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