Ratiometric processing and driver circuit

Details Ratiometric processing and driver circuit Ratiometric processing and driver circuit

1997-07-29

1999-07-06

Tong, Nina

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

340438, 340623, 340612, 73313, B60Q 100

Patent

active

059202556

ABSTRACT:
The electronic interface circuit can perform ratiometric processing and driving of a signal generated by a fuel-level detector of a vehicle. The circuit uses a current mirror configured so as to send one half of the output current to the input resistance and one half of the output current to earth. The current mirror is controlled by a voltage taken from the input resistance and by a voltage taken from a resistive divider, the latter voltage having been filtered by a low-pass filter, so as to achieve ratiometric processing of the input signal.

REFERENCES:
patent: 4309656 (1982-01-01), Okanobu
patent: 4517547 (1985-05-01), Gray et al.
patent: 5483109 (1996-01-01), Gholston
patent: 5504425 (1996-04-01), Fericean et al.

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