Siemens Aktiengesellschaft

Advanced Micro Devices Corporation

(cnbm) Bengbu Design Research Institute for Glass Industry Co. Ltd

Robert Lechner

Hans-Werner Rudolf

Norbert Wingerath

Harald Stader

Roland Krimmer

Nigel P Dyer

Pierre Albouy

Virgilio Mosca

Robert K Galpin

Christopher C Priest

Marcello Manca

Antonio Nicastro

Ramatchandirane Nadaradjane

Robert Le Gougnec

Frithjof Von Sichart

Helmut Vogt

Klaus Wintzer

Peter Picard

Volker Rogasch

Moni Malek

Tom Miller

Josef Forer

Axel Dalhof

Hermann Monat

David Sealer

Manfred Drescher

A method for producing a layer structure for the production of thin-film solar cells including: providing a carrier substrate, depositing a rear electrode layer on the carrier substrate, producing a rear-electrode-layer-free region, creating a measurement layer over the rear electrode layer such that the measurement layer is situated at least over the rear-electrode-layer-free region, wherein the measurement layer is a photoactive absorber layer or a precursor layer of the photoactive absorber layer, and determining a quantity or a relative share of a component of the measurement layer in a region of the measurement layer that is situated over the rear-electrode-layer-free region of the rear electrode layer.

Method for producing a layer structure for thin-film solar cells using etching or laser ablation to produce rear-electrode-layer-free region

The radio control unit (RDU) which is near to the switching office and which is connected via a transmission link (UT) to radio base stations (RBS) near the subscriber is divided into a plurality of switching office-side interfaces (LEIM) conceived as a downtime unit and subscriber-side interfaces (RBIM) which have multiple access to one another in various ways via a multiple bus system. The subscriber connection data are distributed over the databases of the interfaces (RBIM, LEIM). There is good insensitivity to failures with a low level of expenditure on hardware and development.

Subscriber connection net for the connection of subscriber stations to an exchange using a radio system

The arrangement synchronizes the radio transmission in a radiotelephone subscriber connection network. The connection network for the subscriber connection to the telecommunication exchange (LE) is divided into a central control unit (RDU), at least one concentrating, decentralized unit (RBC), as well as a plurality of base stations (RBS) between which and subscriber stations the radio transmission to be synchronized occurs. The decentralized units contain receivers (GPS-E) for reference signals of a radio-locating system, for example GPS, beamed out by satellites and derive time signals therefrom for the time-division multiplex radio frame of the base stations that they transmit thereto via a U-interface (U).

Arrangement for the synchronization of the radio transmission in a

Public communications service with multiple access use of trunk links

Given simultaneous connection of the subscriber line circuits by way of a main distributor to a new switching center and to an existing or old switching center, the subscriber terminals are successively selected proceeding from the new switching center and the old switching center produces connections from a test terminal to these subscriber line circuits. A tone generator of the new switching center supplies a test code word by way of these connections that proceeds via a termination-associated test connection contact and via an external test bus to a code character receiver of the new switching center and is checked therein for coincidence with the test code word.

Method for testing the line connection before switching from a telephone

Radio communication network based on digital local exchanges

A control unit of a subscriber line termination module has access via a programmable interface to the transmitting and receiving arms of a time division multiplex line connected to the switching network. At intervals which are long in relation to the pulse frame length, during the course of existing connections, PCM-words which occur N-times on the receiving arm and, in each case following a reflection time, during a plurality of pulse frames, a plurality of PCM-words occurring on the transmitting arm are received, subjected to amplitude evaluation and, if recognized as valid, subjected to cross-correlation. The result of the cross-correlation provides a control value for the dummy impedance.

Method and a circuit arrangement for setting the subscriber line dummy

A circuit for subscriber line interface circuits in a digital time-division multiplex communication switching center is disclosed. In the case of reception of the same information on the same time slot allocation via a number of subscriber line interface circuits, a transmit time slot as well as a receive time slot is alloted, but access of the transmit driver stages of the subscriber line interface circuits to the bus conductors leading to the switching center is prevented in order to avoid damaging interacting final stages in the transmit driver stages of the subscriber line interface circuits.

Circuit for subscriber line interface circuits in a digital

A digital interface between at least two subscriber line interface circuits and a processing unit is described. The interface is configured in the form of a parallel interface. The level of an input/output register and of a control register is allocated, as needed, to the connections of the processing unit. These connections can be operated selectively as inputs or outputs. They can also be operated in two modes, depending upon which type of subscriber line interface circuit (SLIC) is connected. The connections of the last-mentioned units are partially operable as inputs or outputs and partially operable only as inputs but in the input case, selectively for various types of input signals.

Digital interface between at least two subscriber line interface

A digital interface of an integrated subscriber line interface circuit is provided. The interface serves for the connection of a signal processor unit. Individual connections are used as signal inputs in signal entry operation of the interface, and as signal outputs in signal transmission operation. Other connections are used as signal inputs in both operating mode, but receive different signals in each operating mode. One group of connections includes two registers with respective associated decoders to enable switching from one to the other, so that the number of operating instructions that can be represented by means of binary signal value combinations applied to the connections is doubled.

Digital interface of an integrated subscriber line interface circuit

In a subscriber termination module for coupling a plurality of subscriber termination lines of a digital time multiplex telecommunications network, lines coupling a central portion and local portions individually allocated to at least one subscriber termination line are selectably utilized for the transmission of status setting information to the local portions for setting different operating conditions and for serial transmission, that is, successive transmission of information to be supplied to the individual local portions as well as for simultaneous information transmission from the local portions to the central portion, that is, parallel information transmission.

Method for the operation of an interface circuit between a central

A circuit arrangement for a module in the line-connection section of a digital time-multiplex telecommunication network is disclosed. The module contains, among other things, a transverse filter to perform a two-wire/four-wire conversion and is connected through a transformer to the wires of a subscriber line. In order to compensate for phase distortions caused by reflection of signals from the transformer back to the module, the corresponding signals coming from the module are subjected to an equal and opposite phase pre-distortion. This optimizes the hybrid circuit attenuation.

Circuit arrangement for a module in the exchange of a digital TDM

The invention relates to a circuit arrangement for the indication of loop closure during the ringing condition for a subscriber circuit which is connected to the exchange of a digital time multiplex telephone system by way of a subscriber termination circuit comprising a subscriber line interface circuit which, in part, provides the ringing supply and signalling, and a signal processing unit which, in part, provides for analog to digital conversion and digital to analog conversion as well as for filtering. The circuit arrangement includes a changeover switch, by way of which, a signal representative of the subscriber termination line current is applied to the signal processing unit during the ringing condition, in place of the speech signal present during the speech condition. This voltage signal is subjected to analog to digital conversion and filtering as for the speech signal at other times except that the high-pass filtering otherwise employed is avoided, and in that the resulting digital signal is further summed over at least one period of the ringing signal frequency. The sum signal is compared with a reference value which provides a loop closure signal when the reference value is exceeded by the sum signal.

Circuit arrangement for the indication of loop closure during the

The invention describes a protective circuit for the protection of the electronic interconnect circuit (SLIC) and the electronic switches for test access, by means of a threshold setting element which is provided for each conductor (a,b) of a core pair for the shunting of overvoltages to ground, as well as a current path of higher breakover voltage for each conductor of the core pair, which permits checking the subscriber line circuit for line interruption during a malfunction of the threshold setting element.

Protective circuit for the overvoltage protection of a subscriber line

A protective circuit for the electronic interface circuit (SLIC) as well as the electronic switches for test access is described, in which a first threshold setting element for each conductor of the core pair is connected between the line side and a test access and/or isolation switch and the test access switch for the related first conductor of the core pair, for conducting overvoltages to ground, as well as a second threshold setting element bridging access switch which is connected to ground via a third threshold setting element.

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Otterfing, Germany

Robert Lechner