Electrical transmission or interconnection systems – Nonlinear reactor systems – Parametrons
Patent
1992-11-10
1993-12-28
Heyman, John S.
Electrical transmission or interconnection systems
Nonlinear reactor systems
Parametrons
307219, 3072964, H03L 100
Patent
active
052742725
ABSTRACT:
A device for energizing a load has first and second input terminals adapted to be connected to first and second poles of a first DC voltage source, third and fourth input terminals adapted to be connected to first and second poles of a second DC voltage source and first and second output terminals for connection to the load. First and second electrical connections connect the first and second input terminals to the first and second output terminals, respectively, third and fourth electrical connections connect the third and fourth input terminals to the first and second output terminals, respectively and a transistor switch is included in at least one of the first and second electrical connections. The switch is connected to one of the first and second input terminals and to the first output terminal and will to establish an electrically conducting path between its first and second electrodes if a first DC voltage source is connected to the first and second input terminals and unless a second DC voltage source producing a voltage exceeding the voltage of the first DC voltage source is connected to the third and fourth input terminals. A selectively conductive element is included in at least one of the third and fourth electrical connections, and is in an electrically conducting state when the second DC voltage source is connected to the third and fourth input terminals with a predetermined polarity and is in a non-conducting state when the second DC voltage source is disconnected and the first DC voltage source is connected to the first and second input terminals. In order to prevent a voltage drop across and a loss of power in the switch, the switch has a control electrode connected directly to that one of the third and fourth input terminals to which the selectively conductive element is connected. The control electrode thereby receives from the input terminal a control voltage for controlling the switch.
REFERENCES:
patent: 4291266 (1981-09-01), Portmann
patent: 4556804 (1985-12-01), Dewitt
patent: 4704542 (1987-11-01), Hwang
patent: 5073837 (1991-12-01), Back
"OM1016 I.sup.2 C Evaluation Board", See Page 12 The Section Clock/Calendar Publication From Philips Components.
Franzblau Bernard
Heyman John S.
Riley Shawn
U.S. Philips Corporation
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