Circuit arrangement for recognizing and outputting control...

Details Circuit arrangement for recognizing and outputting control... Circuit arrangement for recognizing and outputting control...

2006-10-03

2006-10-03

Wells, Kenneth B. (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Synchronizing

C327S198000

Reexamination Certificate

active

07116140

ABSTRACT:
An integrated circuit preferably to be connected to a motor vehicle battery is selectively switchable between sleep and normal operating modes. The IC may include a useful control logic circuit, a wake-up circuit evaluating an input signal and responsively outputting a wake-up signal dependent on the input signal, and an input control and supply circuit connected between the wake-up circuit and the control logic circuit. The wake-up circuit includes at least one recognition circuit having an amplifier arrangement to selectively amplify the input signal, and an evaluation circuit having a switch arrangement controlled by the amplified signal and an amplifier producing the output signal. The wake-up circuit has a very low current consumption while monitoring the input signal, and produces the wake-up signal only if the input signal suitably exceeds or falls below a specified voltage threshold. The wake-up signal may activate the control circuit, which may activate the logic circuit.

REFERENCES:
patent: 4453094 (1984-06-01), Peil et al.
patent: 5926049 (1999-07-01), Shi
patent: 6249174 (2001-06-01), Tsunezawa
patent: 6411070 (2002-06-01), Ito
patent: 6636082 (2003-10-01), Price, Jr.
patent: 6747498 (2004-06-01), Pauletti et al.
patent: 6756850 (2004-06-01), Matsushita et al.
patent: 101 23 737 (2002-03-01), None

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