초록 ▼

A container having an electrically conductive container body. The container body defines a container cavity. A sensor assembly is disposed within said container cavity. The sensor assembly is electrically isolated from the container body, and is configured for sensing a level of material within the

A container having an electrically conductive container body. The container body defines a container cavity. A sensor assembly is disposed within said container cavity. The sensor assembly is electrically isolated from the container body, and is configured for sensing a level of material within the container cavity.

대표청구항 ▼

A container having an electrically conductive container body. The container body defines a container cavity. A sensor assembly is disposed within said container cavity. The sensor assembly is electrically isolated from the container body, and is configured for sensing a level of material within the

A container having an electrically conductive container body. The container body defines a container cavity. A sensor assembly is disposed within said container cavity. The sensor assembly is electrically isolated from the container body, and is configured for sensing a level of material within the container cavity. present within the high frequency signal. 11. The system of claim 10 wherein the noise reducing device includes a switch operable to short the high frequency portion to ground. 12. The system of claim 1 wherein said combining circuitry includes a noise reducing device operable to reduce the proportion of the high frequency output and a noise present within the high frequency output in the combined output signal. 13. The system of claim 12 wherein the noise reducing device includes a switch operable to short the output of the low frequency device. 14. The system of claim 8 wherein said high frequency driver includes: a first RC high pass filter coupled to a non-inverting amplifier, the non-inverting amplifier providing a first high frequency output to a first terminal of the primary coil; and a second RC high pass filter coupled to an inverting amplifier, the inverting amplifier providing a second high frequency output to a second terminal of the primary coil, the second high frequency output 180° out of phase with the first high frequency output. 15. The system of claim 1 further including: an amplifier, said input signal coupled to an input of the amplifier, the output of the amplifier coupled to the high frequency driver and low frequency driver; and a frequency band limiter connected to the input and output of the amplifier; the frequency band limiter limiting a voltage applied to the inductive load. 16. The system of claim 1 wherein said high frequency driver includes a first gain circuitry operable to provide a first open loop gain to the high frequency portion, said low frequency driver includes a second gain circuitry operable to provide a second open loop gain to the low frequency portion. 17. A system for driving a load comprising: an amplifier operable to receive a signal having a voltage and provide an amplified output; a high frequency driver including: a high pass filter operable to receive the amplified output and provide a filtered output; and a high frequency amplifier operable to receive the filtered output and provide a high frequency driving signal; a low frequency driver including: a low pass filter operable to receive the amplified output and provide a filtered output; and a low frequency amplifier operable to receive the filtered output and provide a low frequency driving signal; and a transformer, the low frequency driving signal coupled to the secondary coil of the transformer, the high frequency driving signal coupled to the primary coil of the transformer, said transformer providing a combined output signal. 18. The system of claim 17 wherein the combined output signal is configured to drive an inductive load. 19. A method for driving a load comprising: receiving an input signal, the input signal having a high frequency portion and a low frequency portion; providing a high frequency driving signal derived from the high frequency portion; providing a low frequency driving signal derived from the low frequency portion; and driving a load with the high frequency driving signal and the low frequency driving signal. 20. The method of claim 19 wherein driving a load includes driving an inductive load. 21. The method of claim 19 wherein providing a high frequency driving signal includes: receiving the input signal; deriving the high frequency portion from the input signal; processing the high frequency signal by an amplifier; and providing a high frequency driving signal output from the amplifier. 22. The method of claim 21 wherein deriving a high frequency signal from the input signal includes processing the input signal by a high pass filter. 23. The method of claim 21 wherein the amplifier is configured to operate as a buffer. 24. The method of claim 20 wherein providing a low frequency driving signal includes: receiving the input signal; deriving the low frequency portion from the input signal; processing the low frequency signal by an amplifier; and pr