Electricity: power supply or regulation systems – Output level responsive – Using a three or more terminal semiconductive device as the...
Patent
1998-10-01
2000-10-31
Han, Jessica
Electricity: power supply or regulation systems
Output level responsive
Using a three or more terminal semiconductive device as the...
323222, 323284, G05F 146
Patent
active
061408077
ABSTRACT:
An electronic device includes an electrical circuitry interface (112) adapted for coupling with an energy source (106), a comparator (138), and a DC-DC converter circuitry (134) having a switch circuit (161) and an energy storage circuit (132). The switch circuit (161) is coupled to the electrical circuitry interface (112) and to the energy storage circuit (132), and is controlled to charge the energy storage circuit (132). A first input (166) of the comparator (138) is coupled to a voltage that varies with a nominal supply voltage of the energy source (106). A second input (168) of the comparator (138) is coupled to a threshold voltage. A comparator output (160) of the comparator (138) is coupled to the switch circuit (161). In operation, the DC-DC converter circuitry (134) charges the energy storage circuit (132) for a certain time period or until the stored voltage is greater then a desired voltage. The DC-DC converter circuitry (134) is controlled to stop charging the energy storage circuit (132) when current demands cause the energy source voltage to exceed a threshold voltage.
REFERENCES:
patent: 410596 (1978-08-01), Weaver et al.
patent: 4155112 (1979-05-01), Miller et al.
patent: 4495648 (1985-01-01), Giger
patent: 4709404 (1987-11-01), Tamura et al.
Alberth, Jr. William P.
Frane Terrie
Vannatta Louis Jay
Han Jessica
Mancini Brian M.
Motorola Inc.
Oskorep John J.
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