Electronic module energy storage circuitry

Details Electronic module energy storage circuitry Electronic module energy storage circuitry

1994-03-14

1996-05-14

Yoo, Do Hyun

Static information storage and retrieval

Systems using particular element

Capacitors

36518905, 365226, 36523006, 36523008, G11C 1300

Patent

active

055174477

ABSTRACT:
An integrated circuit, in which some areas of the chip are powered from battery, but at least two other areas of the chip can draw power from independent on-chip power-storage capacitors (which are diode-isolated to accumulate charge from an external signal line). The signal line's input buffer draws power from one capacitor, and the decoder logic draws power from another. Thus, even if the first capacitor is depleted by the signal line's staying in the high-current regime, it will be powered up again when the signal line is again driven high; and the charge stored in the second capacitor will permit the decoding logic to operate. Preferably the second capacitor also powers circuitry which encodes a unique serial number for the chip. Thus, even after the battery has died, the chip can be interrogated to ascertain its unique serial number.

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