Power supply self-adjusted circuit for dual or multiple voltage

Details Power supply self-adjusted circuit for dual or multiple voltage Power supply self-adjusted circuit for dual or multiple voltage

1996-03-04

1998-10-20

Krishnan, Aditya

Electricity: power supply or regulation systems

Input level responsive

G08C 1904

Patent

active

058251669

ABSTRACT:
A power supply self adjusted circuit that can sense a power supply voltage and detect whether the power supply is of a first value (e.g., 5V) or a second value (e.g., 3.3 V). In the case of a modem system, the power supply self adjusted circuit then adjusts the modem system accordingly. Hence, using this circuit, a modem or other signal processing circuit can be designed to work for both 5V and 3.3V power supply systems, for example. Futhermore, the power supply self adjusted circuit enables a modem system to automatically adjust itself when the power supply is switched from 5V to 3.3V or vice versa, without any manual intervention from the user. This capability is important for increasingly-popular PC Card- modems.

REFERENCES:
patent: 4400690 (1983-08-01), Brokaw et al.
patent: 4635057 (1987-01-01), Schaefer
patent: 5532918 (1996-07-01), Mayrand et al.

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