초록 ▼

A liquid level sensor unit outputs a voltage value, which corresponds to a measured liquid level, to an anti-slosh circuit that provides a fast timing rate during the initial condition of the circuit and a slow timing rate during the normal operation of the circuit. The anti-slosh circuit further in

A liquid level sensor unit outputs a voltage value, which corresponds to a measured liquid level, to an anti-slosh circuit that provides a fast timing rate during the initial condition of the circuit and a slow timing rate during the normal operation of the circuit. The anti-slosh circuit further includes a low liquid level warning circuit and a power-on-reset circuit. The system timing rate can be externally controlled by connecting an RC circuit to the improved anti-slosh circuit. A customer defined reference level for low liquid warning is also possible. The entire circuit is included on a single, monolithic integrated circuit. An input pin receives the signal from the fuel tank. An output pin drives a liquid level gauge.

대표청구항 ▼

[ What is claimed is:] [1.] An integrated circuit embodied in a single semiconductor chip for providing a liquid level gauge display driving signal to a liquid level gauge, the integrated circuit receiving a liquid level signal from a liquid level sensor unit, the integrated circuit comprising:a clo

[ What is claimed is:] [1.] An integrated circuit embodied in a single semiconductor chip for providing a liquid level gauge display driving signal to a liquid level gauge, the integrated circuit receiving a liquid level signal from a liquid level sensor unit, the integrated circuit comprising:a clock signal circuit for providing a clock signal at a clock frequency;a digital logic circuit coupled to the clock signal circuit for converting the clock signal into a plurality of internal clock signals having different frequencies;a comparing circuit coupled to said digital logic circuit for generating the liquid level gauge display driving signal and for comparing the liquid level signal with the liquid level gauge display driving signal;a current switch circuit coupled to the comparing circuit for driving a reference current into the liquid level sensor unit, the reference current being converted into the liquid level signal having a voltage value proportional to a liquid level measured by the liquid level sensor unit, the voltage value of the liquid level signal then being fed into the comparing circuit; anda gauge driver circuit coupled to said comparing circuit for driving the liquid level gauge.