Abstract: A portable communication device has an antenna configuration that allows to form various different antenna directivity configurations. In particular, a control device discriminates between a transmitting state and a receiving state of the communication device. As based thereon, it effects various non-uniform selection patterns among the directivity configurations.

Abstract: An image is grouped the image into levels of blocks of pixels, each particular level, except a top level, providing a subdivision of each block of pixels of a next higher level into a respective matrix of blocks of pixels of that particular level. An image source transfers pixel values of all of the pixels to an image receiver like a display device on a block by block basis. The blocks in each respective matrix are transferred consecutively without intervening transfer of pixel values of pixels from other blocks from the same level. This makes it possible to make interchangeable use of image receivers with mutually different resolutions, without requiring a change in the way the pixel values are transferred and without requiring a memory in the image receiver for pixel values that are transferred between the pixel values for one block.

Abstract: A printed circuit board is provided with at least one component having one or more leads which are secured to contact faces of the printed circuit board. The leads of the component are secured to the printed circuit board via wire clamps soldered onto the surface of the contact faces. The formation of through-holes in the printed circuit board is rendered superfluous by the wire clamps. For the leaded components use can be made of resistors and capacitors, but also of a single electroconductive wire. Also described is a method of manufacturing the invented printed circuit board.

Abstract: A cordless telephone is provided with a first part having a loudspeaker, a second part having a microphone, and furthermore with a hinge by means of which the second part is pivotable relative to the first part between a folded state, in which the second part lies over the first part, and an open state, in which the second part lies at least substantially in the extended direction of the first part. The first and second parts are provided with support portions adjacent the hinge by which the telephone in its folded state is supported in a vertical position on an at least substantially flat base surface in a stable manner.

Abstract: A battery unit is designed for battery-operated appliances such as cordless telephones, notebook computers, video cameras, etc., and comprises an envelope within which one or several electrochemical cells are accommodated as well as electrical connection contacts, which envelope has at least approximately the shape of a closed rectangular block. To provide a satisfactory and stable guiding, ridges and/or grooves are present at least adjacent the side surfaces of the envelope for mating with corresponding grooves and/or ridges of a housing of a battery-operated appliance to provide a sliding possibility for the battery unit. The envelope is further provided with external asymmetrical locating portions for cooperating with correspondingly shaped and positioned locating portions of the battery-operated appliance so as to prevent an incorrect insertion of the battery unit. The connection contacts are present adjacent the lower surface of the envelope.

Abstract: A DC to DC power converter which can suitably be used, for example, in a charger device for rechargeable batteries has an input and a load output, a resonant transformer provided with a transformer input and a transducer output coupled to the load output, an output rectifier circuit coupled to the load output, a controllable transformer control circuit, in the form of a pulse providing circuit, coupled between the input of the converter and the transformer input, and a synchronous output rectifier circuit coupled between the transformer output and the load output. The transformer control circuit receives a control signal derived from a signal constituting or proportional a signal at the transformer output. The output rectifier circuit shows a variety of possible embodiments, each embodiment including at least two transistor switches which are connected between a different end of the transformer output and a same end of the load output.

Abstract: A power supply device produces, on a plurality of accesses, a plurality of voltages coming from a plurality of accumulator assemblies formed by at least one accumulator element and connected in series by at least one series connection. The power supply device includes a back-up provision for mitigating discharges of at least one of the accumulator assemblies.

Abstract: Known is an induction charging apparatus for charging battery means in an electronic device when inductively coupled to the charging apparatus, the charging apparatus comprising a first casing having a charging receptacle for receiving the electronic device and an alternating current power source coupled to a primary coil provided in the first casing, and the electronic device comprising a second casing provided with a secondary coil electronically coupled to the battery means, whereby the primary and the secondary coil are magnetically coupled for inductively conveying energy from the primary coil to the secondary coil when the electronic device is put in the receptacle.

Abstract: A digital lattice filter, comprising a plurality of identical stages each having a pair of inputs for receiving input signals and a pair of outputs for supplying output signals, these stages being connected in a cascade arrangement, each stage consisting in two mutually linked branches and no less than one of these branches comprising delay means, and in that always an even number of successive cascaded filter stages forms a group, in which both branches of each group of filter stages comprise a delay elements such that the time delay in the first branch is equal to the time delay in the second branch.