Abstract: An apparatus for safely operating at least two components which are movable relative to one another in a machine for processing printing materials, includes drive motors each driving a respective one of the movable components. At least one control computer detects movement of the movable components. The control computer is set up in such a way that, if a spacing is reduced between the movable components, at least that movable component, which is the cause for the reduction in the spacing between the movable components, is brought to a standstill. A printing press having the apparatus is also provided.

Abstract: A cover for a cylinder head of an internal combustion engine having a connecting element for attachment the cylinder head and a sealing element arranged between the cylinder head cover and the cylinder head. The connecting element is associated with a connecting area, and the sealing element is associated with a sealing area. The connecting area and the sealing area are constructed independently of each other and are spatially separated from each other, and the force vectors of the connecting force transmitted by the connecting element and the sealing force transmitted by the sealing element form an angle with each other.

Abstract: A general method is given for screening laser diodes for electrostatic discharge, (ESD), damage. The laser diode may be selectively isolated from the laser driver so that a current-voltage (I-V), curve can be taken and then compared to curves taken previously on the same laser diode to ascertain the possibility of ESD damage. Presumably the initial I-V curve will be representative of the characteristics of that particular laser in the undamaged state. Such an initial curve may be supplied by the manufacturer and may be a curve specific to a particular laser diode. Comparison with a standard curve is not sufficient to determine ESD damage in the early stages of failure. Some embodiments focus on isolating the laser diode from the laser driver, storing the information locally in the transceiver, and providing some analysis resulting in flagging laser diodes showing changes that are indicative of ESD damage.

Abstract: In one example, an optoelectronic transceiver includes an optical transmitter with which a set of operating wavelengths is associated. A temperature sensor and heat transfer device are thermally coupled with the optical transmitter, and drive circuitry is provided that is in communication with the heat transfer device. The optoelectronic transceiver further includes a control device in communication with the temperature sensor and with the driver circuitry. The control device includes a memory within which is stored several temperature control values, where each of the temperature control values is associated with a respective operating wavelength of the optical transmitter. Finally, the control device includes logic coupled with the memory, wherein an output of the logic is a command signal that concerns operation of the driver circuitry and corresponds with a selected operating wavelength. The command signal is based in part upon a temperature control value and input from the temperature sensor.

Abstract: Apparatus for separating oil from crankcase ventilation gases of an internal combustion engine having at least two oil separators in the form of cyclones connected in parallel and traversed by the crankcase ventilation gases. The apparatus is equipped with a control valve that divides the volumetric flow of the crankcase ventilation gases into at least two subflows, depending on the magnitude of the volumetric flow, and conducts the subflows to the at least two oil separators. A control piston releases or blocks access of the gases to additional cyclones depending on the dynamic pressure of the crankcase gas.

Abstract: This disclosure concerns systems, methods and devices for temperature-based control of laser performance. One example of a method is performed in connection with a laser of an optoelectronic transceiver. In particular, the laser is operated over a range of temperatures and the optical output of the laser is monitored. During operation of the laser, the bias current and current swing supplied to the laser are adjusted to the extent necessary to maintain a substantially constant optical output from the laser over the range of temperatures.

Abstract: An optical transceiver module having a multiplexing analog control interface. The optical transceiver module comprises a controller and integrated post-amplifier/laser driver, which are included on a printed circuit board associated with the module. Transmitting and receiving optical sub-assemblies are also included in the module. A time division multiplexing analog control signal interface interconnects the controller with the integrated post-amplifier/laser driver. Digital control signals produced by the controller are converted and combined into a multiplexed analog control signal and transmitted via the interface to the integrated post-amplifier/laser driver. After receipt by the integrated post-amplifier/laser driver, the multiplexed analog control signal is divided into discrete analog control signals and forwarded to a plurality of control devices that use the control signals to modify a plurality of operating parameters of the transceiver module.

Abstract: A microprocessor is used to control the temperature of a laser emitter and thereby regulate the wavelength of optical signals from the laser. A serial interface in the microprocessor provides input and output lines to a host device, and temperature lookup tables are stored in nonvolatile memory. Control logic processes information stored in the memory as well as information on operating conditions of the laser emitter to precisely control the temperature of the laser emitter. A thermo-electric cooler adjusts the temperature of the laser emitter.

Abstract: A method for optimizing a dc operating drive current of a laser diode is presented. Lasers of a particular type are characterized in terms of the dependency of certain parameters on temperature and of the minimum bias current required for adequate laser speed. The minimum bias current is determined using the operating bias current minus the threshold current all normalized by the threshold current. For individual laser diodes, the threshold current and slope efficiency are obtained at various temperatures to allow calculation at operating temperatures of interest. The minimum laser bias current for speed can then be determined over the operating temperature range. This may be done by setting the optical power to the highest value calculated using this minimum acceptable bias criterion over the operating temperature range. The ac and dc laser driver current sourcing requirements may be computed to ensure laser and module compatibility.

Abstract: A cover for a cylinder head of an internal combustion engine having a connecting element for attachment the cylinder head and a sealing element arranged between the cylinder head cover and the cylinder head. The connecting element is associated with a connecting area, and the sealing element is associated with a sealing area. The connecting area and the sealing area are constructed independently of each other and are spatially separated from each other, and the force vectors of the connecting force transmitted by the connecting element and the sealing force transmitted by the sealing element form an angle with each other.

Abstract: The invention concerns method for scheduling of user terminals (T) to subcarriers in a multi-cell or multi-sector network using FDM transmission with interference coordination and with the frequency band used for FDM transmission being subdivided into at least two frequency subsets (F1, F2 . . . FR), whereby the data throughput of user terminals (T) is measured or modeled by means of the signal to interference ratio measured by said user terminals (T) dependent on the frequency subset (F1, F2 . . . FR), subcarriers are allocated preferably to user terminals (T) with a high signal to interference ratio on said subcarriers, and subcarriers are allocated in clusters to the user terminals (T), whereby all clusters offer the same data throughput for the respective user terminal (T), a base station (BS), a user terminal (T) and a network therefor.

Abstract: A microprocessor is used to control the temperature of a laser emitter and thereby regulate the wavelength of optical signals from the laser. A serial interface in the microprocessor provides input and output lines to a host device, and temperature lookup tables are stored in nonvolatile memory. Control logic processes information stored in the memory as well as information on operating conditions of the laser emitter to precisely control the temperature of the laser emitter. A thermo-electric cooler adjusts the temperature of the laser emitter.

Abstract: An integrated post-amplifier and laser driver assembly is provided that includes a digital control interface for communication with an external digital IC controller having an I2C bus configured to receive signal parameter programming input from a user. The PA/LD includes one or more DACs which communicate with the digital control interface by way of a glue logic module. A memory is provided in the PA/LD that communicates with the DACs by way of the glue logic module and stores an algorithm for facilitating implementation of changes to signal parameters of one or more signals by way of the DACs. Signal parameter programming instructions are received at the PA/LD from a user by way of the I2C bus, and/or from the internally coded algorithm, and are used by the DACs to facilitate implementation of changes to signal parameters of one or more signals.

Abstract: Systems and methods to measure signal propagation delay through objects. The system includes a controller, a single shot pulse generator, a first pulse/edge former, a multiplexer/demultiplexer, a second pulse/edge former, a timer, and a counter. The controller initializes the system, the clock and the counter. A pulse is sent from the single shot pulse generator to the first pulse/edge former. The pulse is propagated through the first pulse/edge former to the multiplexer, through a device under test, to the demultiplexer, and to the second pulse/edge former. The second pulse edge generator provides the pulse to the counter, which counts a predetermined number of pulses, and the clock, which measures the amount of time the counter counts the pulses. The propagation delay of the device under test is then calculated based on the counted number of pulses and the elapsed time measured by the clock.

Abstract: An optical transceiver device having digital and programmable control over transceiver components is disclosed. The optical transceiver module comprises a controller and an integrated post-amplifier/laser driver (“PA/LD”), which are included on a printed circuit board disposed in the module. Transmitting and receiving optical sub-assemblies for transceiving optical signals are also disposed in the module. A digital signal interface interconnects the controller with the integrated PA/LD. A microprocessor is interposed between the controller and the PA/LD and is connected to both components via the digital signal interface. Digital control signals produced by the controller are transmitted via the digital signal interface to the integrated PA/LD where they are converted to analog signals for use by a plurality of control amplifiers. Conversely, analog feedback signals produced by the control amplifiers are converted to digital signals and transmitted to the controller.

Abstract: An EMI shielding mechanism for use with an electronic module, such as an opto-electronic transceiver module, is disclosed. The EMI shielding mechanism includes a plurality of shielding tabs disposed on an outside face of the module. When the module is fully disposed in a port of a host device, the shielding tabs contact an edge of the port, thus reducing the amount of EMI radiation emitted form that edge. The shielding tabs are angled so that when the module is fully disposed in the port, a portion of the shielding tabs is inside the port and a portion is outside of the port. The angled shielding tabs provide a spring force which assists a user to extract the module from the port.

Abstract: An optical transceiver module having a digital control interface is disclosed. The optical transceiver module comprises a controller and integrated post-amplifier/laser driver, which are included on a printed circuit board disposed in the module. Transmitting and receiving optical sub-assemblies are also disposed in the module. A digital signal interface interconnects the controller with the integrated post-amplifier/laser driver. Digital control signals produced by the controller are transmitted via the digital signal interface to the integrated post-amplifier/laser driver. After receipt by the integrated post-amplifier/laser driver, the digital control signals are converted to analog control signals and forwarded to control amplifiers that use the control signals to vary a plurality of operating parameters of the transceiver module. The digital signal interface can also be employed to provide feedback to the controller relating to the operation of the control devices.

Abstract: Systems and methods are disclosed measuring the turn-on and turn-off times of an optoelectronic transceiver's transmitter circuitry. The method includes generating a two bit sequences from separate bit sequence generators using the same controlling pattern. The first bit sequence is transmitted through an optoelectronic device and compared with corresponding bit groups in the second bit sequence. The optoelectronic device is disabled and a count of compared bit groups is kept until the comparison indicates that the optoelectronic device is completely off. Using the count and one or more of the bit groups, a turn-off time is calculated. Alternatively, the method is used to calculate a turn-on time. The optoelectronic device is enabled and a count is kept from the time the device is enabled to when the comparison of the corresponding bit groups indicates that the optoelectronic device is completely on.

Abstract: Methods and processes are disclosed for calibrating optoelectronic devices, such as optoelectronic transceivers and optoelectronic receivers, based upon an avalanche photodiode breakdown voltage. In general, the method involves adjusting a reverse-bias voltage of the avalanche photodiode until avalanche breakdown of the avalanche photodiode occurs. An optimized APD reverse-bias voltage is then determined by reducing the reverse-bias voltage at which avalanche breakdown occurs by a predetermined offset voltage. This process is performed at a variety of different temperatures. Information concerning each temperature and the corresponding optimized APD reverse-bias voltage is stored in a memory of the optoelectronic device.

Abstract: An integrated circuit is provided, which is formed on a semiconductor substrate. The integrated circuit comprises electronic elements and isolation elements, wherein the electronic elements and the isolation elements are arranged at a top surface of the semiconductor substrate. The isolation elements each are arranged between electronic elements and electrically isolate the electronic elements from each other. Furthermore, the isolation elements comprise an upper part and a lower part, wherein the upper part is broader than the lower part.