Electrical transmission or interconnection systems – Plural supply circuits or sources
Patent
1994-06-23
1996-10-22
Shoop, Jr., William M.
Electrical transmission or interconnection systems
Plural supply circuits or sources
307 23, 307 29, 307 64, 307 65, 307 66, 363 19, 363 21, H02J 314
Patent
active
055679935
ABSTRACT:
A programmable power controller for controlling power between a primary power source and a second power source and powering first circuitry, each of which has a voltage, comprises a control register having a first field, which is used to activate circuitry used to direct power from the primary power source to the second power source, and circuitry to compare the first voltage and the second voltage to determine which is greater and then coupling the primary power source or the second power source depending upon which is greater to power the first circuitry. The control register also has a second field used to select an electrical path having a first voltage drop that ensures the primary power source will have a higher voltage when the primary power source is active under normal operating conditions and a third field used to select an electrical path of a plurality of electrical paths, each electrical path having a variety of voltage drops and resistances. The second power source is preferably chargeable, such as a capacitor or a rechargeable battery.
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Jones Brian W.
Morton Alan M.
Dallas Semiconductor Corporation
Paladini Albert W.
Shoop Jr. William M.
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