Abstract: A method for the at least temporary activation of bidirectional communication between a transponder having a nonvolatile memory area and a base station, whereby the transponder in an at least partial mute state receives messages, but no information-related data from the nonvolatile memory area are transmitted and for activation a data stream is transmitted to the transponder by the base station, wherein the data stream for a transmission is linked with a symmetric password, the enable signal is extracted by the transponder with the symmetric password from the received data stream, and the transponder is activated at least temporarily after the enable signal has been verified as valid. The invention relates further to a transponder having means for carrying out this type of procedure.

Abstract: A method for testing integrated circuits comprises: generation of a change in an input signal of the integrated circuit, detection of a change in the output signal of the integrated circuit, the change triggered by the change in the input signal when a predetermined condition is satisfied, and a comparison of the detected output signal with at least one predetermined comparison criterion. Whereby, the predetermined condition is derived individually for each integrated circuit from a time response of the output signal.

Abstract: A method for integrating an electronic component or the like into a substrate includes following process steps: formation of a dielectric insulating layer on the front side of a substrate; complete back-etching of an area of the substrate from the back of the substrate to form a cavity; formation of a photoresistive layer with a homogeneous thickness over the back of the substrate; placement of an electronic component on the photoresistive layer formed in the cavity for adhesion of the electronic component to the photoresistive layer; removal of the formed photoresistive layer except for the area on which the electronic component adheres to the photoresistive layer in the cavity; and formation of a fixing layer over the back of the substrate to fix the electronic component in the cavity of the substrate.

Abstract: A method for integrating three bipolar transistors into a semiconductor body, multilayer component, and semiconductor arrangement is provided. A tendency toward thyristor-like behavior of the multilayer semiconductor arrangements with the three bipolar transistors is suppressed with the aid of a heterojunction. The high frequency characteristics and the blocking capability of the circuit of the three bipolar transistors is made more flexible, while the capability of an input signal to control an output signal is maintained.

Abstract: The invention discloses a monolithic integrated circuit with at least one signal connection carrying a signal and with an interference suppression device integrated in the circuit to reduce radiated interference. The interference suppression device has at least one stripline having a section whose beginning is coupled to the signal connection and whose end is short-circuited, wherein a length of the section is chosen as a function of a predefinable frequency, in particular as a function of a frequency of the radiated interference that is to be suppressed.

Abstract: For transmitting data between a base station and a transponder, information packets modulated onto an electromagnetic carrier wave each include a header section, a middle section, and an end section. The data are encoded in the middle section using information symbols, e.g. representing digital “1s” and “0s”. The header section of at least the first packet defines the number and unique identifications of all of the symbols that will be used for encoding the data in the middle section of this and/or subsequent packets. This transmission protocol defined in the header section can be varied in subsequent packets to adaptively adjust the transmission rate depending on the existing communication conditions and requirements such as high frequency regulations prescribed by national law. The transmission rate can be considerably increased, in comparison to a transmission rate that would otherwise be necessary for achieving a reliable transmission even under unfavorable conditions.

Abstract: A planar microwave line is provided, having a dielectric substrate and a planar arrangement of a first microstrip conductor and at least one additional microstrip conductor, in which a gap between the first microstrip conductor and the additional microstrip conductor permits an electromagnetic coupling, a first region in which the microwave line has a first direction, a second region in which the microwave line has a second direction, and a transition region in which a change from the first direction to the second direction occurs. The microwave line is characterized in that the adjacent edges of the first microstrip conductor and of the additional microstrip conductor in the transition region are equal in length and do not cross.

Abstract: An integrated quartz oscillator circuit is disclosed having a capacitive voltage divider, which has a first capacitor and a second capacitor, as well as having a first transconductance amplifier, which is placed in a loop connecting a first terminal and a second terminal of the first capacitor. An input of the first transconductance amplifier is connected to a center tap between the first capacitor and the second capacitor, an output of the first transconductance amplifier is connected to the first junction of the first capacitor, and the quartz oscillator circuit has a conductive element connected parallel to the second capacitor.

Abstract: Data encoded in packets modulated onto a carrier wave is transmitted between a base station and a transponder. Each packet includes a header section containing at least a reference symbol, and a further section such as a data section. In the transponder, the time duration of the reference symbol is determined, and a parameter is adjusted dependent on the determined duration. The parameter determines at least a property, such as the time resolution, of the encoding and/or decoding operation, and may be the clock frequency of a counter circuit or the charging current of an RC-circuit used to determine the duration of the symbols. The parameter may initially be set to a minimum default value, which is increased if the determined duration is less than or equal to a specified threshold. Thereby, power consumption is minimized while ensuring reliable encoding and decoding over a large range of transmission distances.

Abstract: Time signals transmitted by a time signal transmitter and received by a receiver are processed for gaining time information and for reducing demodulation errors to increase the demodulation certainty. For this purpose the following steps are performed in a time signal receiver: a) scanning of received time signals, b) storing of scanned values of the time signal, c) detecting from the scanned and stored values an amplitude change in said time signal, d) measuring the duration of any detected amplitude changes, e) evaluating the measured time durations relative to a predetermined time duration (?t) and f) excluding from further processing amplitude changes that have a measured duration that is shorter than the predetermined duration. Amplitude changes of longer duration than (?t) are demodulated and further processed. The receiver circuit is equipped to perform the foregoing steps, particularly in a radio-controlled clock.

Abstract: An integrated circuit is disclosed that includes a MOS output stage transistor, a gate terminal for applying a drive signal, which controls the turning on and off of the output stage transistor, a charge transistor, which when the output stage transistor is turned on supplies a gate electrode of the output stage transistor with a charging current, and a discharge transistor, which when the output stage transistor is turned off supplies the gate electrode of the output stage transistor with a discharge current. Also, a turn-off control unit is disclosed, which when the output stage transistor is turned off supplies the gate electrode with an additional discharge current during a second time interval and turns off the additional discharge current after the second time interval.

Abstract: A method and apparatus for wireless data transmission between a base station and one or more, in particular, passive and/or backscatter-based transponders, in which the base station modulates a carrier signal with a modulation signal, to generate synchronization markers, and transmits the modulated carrier signal. Whereby, a frequency of the modulated carrier signal can be switched between different frequency values.

Abstract: A method for structuring a laterally extending first layer in a semiconductor device with the aid of a reactive second layer, which together with the first layer to be structured forms first reaction products, which products are removed by material removal that acts selectively on the first reaction products, whereby the structuring takes place in a vertical direction.

Abstract: A constant voltage source is disclosed having an output current control element, which adjusts an output voltage of the constant voltage source by varying its output current, a control circuit, which acquires a measure for an actual value of the output voltage and processes it to a control signal for the control of the output current control element, and a limiting circuit, which limits the output current to a predefined maximum value by action on the control signal, whereby the limitation is independent of an actual value of the output current.

Abstract: A cascode of a high-frequency circuit, includes a first transistor having a first base semiconductor region, a first collector semiconductor region and a first emitter semiconductor region, and a second transistor having a second base semiconductor region, a second collector semiconductor region and a second emitter semiconductor region. The first emitter semiconductor region of the first transistor and the second collector semiconductor region of the second transistor are geometrically arranged on top with respect to a wafer surface, while the first collector semiconductor region of the first transistor and the second emitter semiconductor region of the second transistor are geometrically arranged on the bottom with respect to the wafer surface.

Abstract: A method for generating a pulse train is provided with adjustable start and end times of individual pulses, in which additional clock signals are generated from a 0th clock signal, the signals which in each case have a frequency of the 0th clock signal and whose phase is shifted in each case relative to a phase of the 0th clock signal. Pairs of one first clock signal and one second clock signal are provided, partial pulses are generated from the properties of the first and second clock signal of a pair in accordance with a timing vector, and the pulse train is generated by superimposition of partial pulses.

Abstract: A process for manufacturing a semiconductor device, provides that a silicide layer is formed, an amorphous semiconductor layer is applied both to the silicide layer and to an open monocrystalline semiconductor region, adjacent to the silicide layer, and during a subsequent temperature treatment, the amorphous semiconductor layer is crystallized proceeding from the open, monocrystalline semiconductor region, acting as a crystallization nucleus, so that the silicide layer is covered at least partially by a crystallized, monocrystalline semiconductor layer.

Abstract: A driver circuit is provided, which includes a differential amplifier whose output signal controls the driving input signal, a reference signal generator that supplies a reference input of the differential amplifier, an external feedback that applies a signal, which is dependent on the output signal, to a feedback input of the differential amplifier, an adapter circuit, and an internal feedback activated in a compensation mode as an alternative to the external feedback, which internal feedback provides a signal to both the feedback input and the adapter circuit even for input signals that do not exceed the first threshold. The adaptor circuit generates and stores a compensation signal that compensates an offset signal acting alone at the reference input when the reference signal generator is switched off, and feeds the stored compensation signal, together with a reference signal, to the reference input or feedback input when the external feedback is activated.

Abstract: A method and circuit for wireless data transmission between a base station and one or more transponders is provided in which the base station modulates a carrier signal with a modulation signal and transmits it, in which symbols that are to be transmitted are coded by the base station using sequential delimiters. A value of a particular symbol being determined by the time period between two sequential delimiters, and in which the particular delimiter is generated by changing the modulation signal during a modulation period. Whereby, the modulation signal is preferably a noise signal during the modulation period.

Abstract: One or more transponders are selected by a base station out of a plurality of transponders. For this purpose an identification bit sequence (IB) that is or includes a random number bit sequence (ZB) is made available in the respective transponder and the base station transmits in a bit-by-bit fashion a selection bit sequence (AB) to the transponders. These sequences (IB or ZB) and (AB) are compared bit-by-bit in the respective transponder. The comparing is performed by way of a predeterminable comparing criterion to provide a comparing result in the form of a selection bit to which a bit value is assigned. The selection is then made depending on the bit value of the selection bit of the respective transponder.