Inverter system with variable input gain apparatus and...

Details Inverter system with variable input gain apparatus and... Inverter system with variable input gain apparatus and...

2008-01-31

2009-06-02

Jeanglaude, Jean B (Department: 2819)

Coded data generation or conversion

Analog to or from digital conversion

Nonlinear

C341S155000, C341S141000

Reexamination Certificate

active

07541956

ABSTRACT:
An inverter system includes a comparator unit receiving an analog input voltage signal and compared with at least one threshold voltage value to determine a voltage range of the analog input voltage signal. An amplifier unit receives and amplifies the analog input voltage signal. A feedback-controlling gain unit adjusts a voltage gain of the amplifier unit according to the voltage range of the analog input voltage signal. An analog-to-digital converter unit converts an analog signal outputted from the amplifier unit into a digital count. A microcontroller unit is electrically connected with the analog-to-digital converter unit and the comparator unit. The microcontroller unit receives an indicating signal outputted from the comparator unit to know the voltage range of the analog input voltage signal. The microcontroller unit receives a digital count outputted from the analog-to-digital converter unit to correctly calculate an original value of the analog input voltage signal.

REFERENCES:
patent: 5526126 (1996-06-01), Furihata et al.
patent: 6459458 (2002-10-01), Balaban
patent: 7030800 (2006-04-01), Arai et al.
patent: 2001/0006542 (2001-07-01), Ozeki et al.
patent: 2007/0258548 (2007-11-01), Sutton
patent: 2008/0100485 (2008-05-01), Tanaka et al.

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