Patent ID: 9243948
Filing Date: 2016-01-26
CPC Classification: G01F,H03B

Claim Text:
1. An apparatus for determining or monitoring the fill level of a substance in a container, comprising: a high frequency oscillator producing high-frequency measuring signals; an in/out coupling unit, an antenna, which transmits the high-frequency measuring signals in the direction of the surface of the fill substance and receives the measuring signals reflected on the surface of the fill substance; and an evaluation unit, which, based on the travel-time difference of the transmitted measuring signals and the reflected measuring signals, ascertains the fill level in the container, wherein: said high frequency oscillator has a transistor with a source branch, a drain branch and a gate branch, at least one frequency tuning component and at least one frequency determining component; and said frequency determining component of said high frequency oscillator is arranged in the source branch of said transistor.