Method for controlling an analogue switch including a transistor to which a variable analogue input voltage Vin is applied on a first terminal between a source terminal and a drain terminal of the transistor while a second terminal between the drain and the source terminal is at a variable output voltage V.sub.ST, including the steps of: during a first phase, applying a first voltage to the transistor gate, the first voltage equal to a sum of or a difference between Vin and a first constant pote...

A digital to analogue converter comprising at least two resistor ladders (A, B) and at least two banks of switches (SwA, SwB etc.), means for controlling said switches in accordance with at least the MSBs of a digital input signal, connecting means (Rx) for connecting the two resistor ladders at their ends to form a ring topology, said connecting means comprising means for deriving two analogue output signals to form a differential analogue output signal. The output means may include further res...

An analogue to digital converter using several flash converter units to convert successively the increasingly lower orders of resolution, wherein the transition from a stage of lower magnitude of resolution to that stage of successively higher magnitude of resolution is obtained by physically isolating the resistor element of the resistor ladder of the first flash converter wherein the unresolved portion of the input voltage falls, and substituting a second flash converter comprising a resistor ...

A digital-to-analogue converter for use in a digitally-recorded-signal reproducing apparatus comprises a first constant current source, a switch for allowing the constant current of the first constant current source to flow therethrough for a period corresponding to the digital data, a second constant current source generating a current flowing in the direction opposite to that of the current generated by the first constant current source, a switch for allowing the current of the second constant...

The invention relates to an analogue sensor for sensing deviation from a normal position in at least two directions. The sensor senses dimensions in at least one direction and for this purpose it has a ball (52) at the tip of a measuring stick (51), which is resiliently mounted in such a manner that it can move essentially about a center. It is the deviation of the tip from its normal position which is to be indicated. The stick has a sensor portion (8, 9; 54, 55; 71, 72) placed in a sensor unit...

An apparatus for digital-to-analogue conversion. A dither generator creates a noise signal which is added to a digital input signal to produce an added output. Noise shaping is performed on the added output at a noise shaping circuit. The noise shaping circuit includes a quantizer with certain threshold levels for quantizing the added signal. A digital-to-analogue (D/A) converter converts the output of the noise shaping circuit to an analog signal. A control circuit widens the threshold levels a...

This is an analogue to digital converter channel including an analogue multiplexer, a switched gain amplifier, a mode amplifier, a sample and hold stage, and an analogue to digital converter. Off-set errors can be precalculated and then corrected for by switching the input to the amplifiers to null, and storing the output from the converter, and the amplified output from the gain amplifier respectively at `X` and `Y` and then combining those stored off-set error signals at an adding circuit at t...

The present invention is directed to a method of treating one or more of the following disease and/or conditions, which comprises administering to a patient in need thereof the compound H-.beta.-D-Nal-Cys-Tyr-D-Trp-Lys-Val-Cys-Thr-NH.sub.2, where the Cysteines are bonded by a disulfide bond, or a pharmaceutically acceptable salt thereof, most preferably the acetate salt of the compound, in the treatment of certain diseases and/or conditions such as gastroenterological conditions and/or diseases,...

An active avermectin analogue which can be produced by directed biosynthesis is described. The compound, named 26-R-Avermectin B.sub.1 a, is active in the Haemonchus egg to L3 assay and has the following structure: ##STR1##

A pharmaceutical composition comprising a nucleotide analogue and one or more glass forming additives which is suitable for freeze drying.