Abstract: A current supply circuit includes an input, a load terminal, a selectively activatable current regulator, a selectively activatable adjustable current source, and a comparator circuit. The input is configured to receive a first value signal. The load terminal is configured to provide a load current that is dependent on the first value signal. The current regulator is operable to, when activated, cause a first current to be provided through the load based on the first value signal. The adjustable current source is operable to, when activated, cause a second current to be provided through the load based on the first value signal. The comparator circuit is operable to generate a comparison of the first value signal and a second value signal, and is further operable to cause selective activation of one of the current regulator or the adjustable current source based on the comparison.

Abstract: The invention relates to a current supply circuit and a method for supplying current to a load.

Abstract: A clamping circuit is described which prevents an input signal present on an input path from being able to assume a negative potential. The circuit is distinguished by a high voltage endurance in conjunction with accurate adherence to the clamping voltage and, at the same time, a low current consumption in the normal mode. The clamping circuit contains cross-coupled first and second transistors and can be changed over from a normal mode to a clamping mode if the voltage of the input signal falls below a predetermined clamping voltage, preferably 0 V. For this purpose, a third transistor is provided, which is connected into the input path in such a way that it is in a reverse conducting state in the clamping mode of the circuit and in a forward blocked state in the normal mode.

Abstract: The length of a column of a gaseous or liquid substance or of a solid bar is determined by generating a standing wave of known frequency, wavelength and/or wave velocity in the column or in the bar. The wave frequency is varied until at least two consecutive maxima (antinodes), two consecutive minima (nodes) or a minimum following a maximum of the amplitude of the standing wave have been detected. The length of the column of medium at known frequency and wave velocity of the standing wave generated in that column is computed from the equationL=c/[2(f.sub.n -f.sub.n-1)] (1),where L is the length of the column of medium, c is the wave velocity, f.sub.n is the frequency of the nth maximum and f.sub.n-1 the frequency of the (n-1)th maximum. Apparatus for implementing the method comprises a loudspeaker 1 mounted in a resonance chamber 2 with a tubular acoustic exit aperture 3.

Abstract: The length of a column of a gaseous or liquid substance or of a solid bar is determined by generating a standing wave of known frequency, wavelength and/or wave velocity in the column or in the bar. The wave frequency is varied until at least two consecutive maxima (antinodes), two consecutive minima (nodes) or a minimum following a maximum of the amplitude of the standing wave have been detected. The length of the column of medium at known frequency and wave velocity of the standing wave generated in that column is computed from the equationL=c/[2(f.sub.n -f.sub.n-1)] (1),where L is the length of the column of medium, C is the wave velocity, F.sub.n is the frequency of the nth maximum and F.sub.n-1 the frequency of the (n-1)th maximum. Apparatus for implementing the method comprises a loudspeaker 1 mounted in a resonance chamber 2 with a tubular acoustic exit aperture 3.