A method and apparatus for generating second pulse signal from a first pulse signal. The second pulse signal has flanks positioned with a well-defined spacing. The width of the pulses as well as the frequency and phase correspond to the first signal. The apparatus employs a shape generator for generating a shape signal having uniform and well-defined flanks. A frequency generator produces a clock signal wherein the clock and phase correspond to the first pulse signal. The signal generator produc...

Disclosed is a method of obtaining data to determine a rotation matrix R, for rotating the axes (x,y,z) of an analogue probe coordinate system (PCS) onto the axes (X,Y,Z) of a machine coordinate system (MCS). The head (14) of the machine is driven to bring a measuring tip (16) of a stylus (12) supported by the probe for movement relative to the head (14) into engagement with a kinematic location (20). With the tip (16) fixed in the location (20) the head is then moved to six different locations....

The present invention relates to a new prostagrandine I analogous compounds represented by the following formula (I) and (II). ##STR1## wherein R.sub.1 is a hydrogen atom or alkyl group, at least one of R.sub.2 and/or R.sub.2 ' are a halogen atom, an alkyl group, a group containing an aromatic group, a hydroxyl group or an alkoxy group providing that the R.sub.2 and R.sub.2 ' are not simultaneously hydrogen atoms or salt thereof, which compound is expected as hypotensives.

A high-speed digital to analogue convertor includes a matrix of cells each including a current source, in which there are provided local decode circuitry within each cell to bring into operation simultaneously all those current sources required to decode any one value.

An object of the invention is to enable not only to select an ODD signal and an EVEN signal on the same timing but also to set up a duty ratio of the ODD-signal component to the EVEN signal component to be 50%. The purposes are attained by use of a constitution wherein on an analogue signal processing circuit for processing the ODD-signal and the EVEN-signal divided from an output image signal produced from a CCD-type sensor to have the same phase which are then digitized by a singular A/D conve...

Methods and apparatus are described for processing an optical signal. The optical signal comprises at least a first channel signal at a first wavelength modulated by a first frequency, a second channel signal at a second wavelength modulated by a second frequency, and a third channel signal at a third wavelength modulated by a third frequency. The method includes receiving the optical signal, and splitting the received optical signal into at least two optical bands, a first optical band comprisi...

The present invention provides a biological particle analogue, or biological analogue, that simulates a chosen biological organism or compound. The biological analogue includes a first portion that is not, in and of itself, recognized by the biological detection system, and a second portion, which provides the properties necessary for recognition by the detection system, carried by the first portion. The biological analogue is constructed in such a way as to include some important characteristic...

An analogue-to-digital converter includes a summing element for combining an analogue input signal of the analogue-to-digital converter with a feedback signal in order to generate a fault signal, a quantizer which has comparators for comparing the fault signal with reference voltages in order to generate a digital output signal, a digital-to-analogue converter for converting the digital output signal into the feedback signal, a control device for generating a control signal from the digital outp...

The invention relates to a method of selectively producing adamantanes in a production apparatus made of an inexpensive material, not having any negative influence on the natural environment. The method for producing adamantanes includes isomerizing a tricyclic saturated hydrocarbon having at least 10 carbon atoms in the presence of a metal-carrying solid acid catalyst, wherein water and/or alcohol is made to coexist along with the catalyst during the isomerization.

An analogue to digital converter (ADC) of the recirculating type is described. In one embodiment, the ADC is composed of three storage and residual determination units, which, in cooperation with an operational amplifier, and suitable comparator means, are operable to re-present residual signals for analogue to digital conversion. To enhance settling at the beginning of a cycle, the first storage and residual determination unit is used once, with remaining recirculation being conducted between t...