摘要:
A receiver circuit having an optical reception device and having an amplifier connected to the reception device, the amplifier also having a circuit for setting the operating point of the amplifier and also at least one control terminal of the circuit, by which the operating point of the amplifier can be selectively changed between at least two values at the user end. The receiver circuit according to the invention enables a noise optimization of the amplifier by virtue of an adjustability of the operating point of the amplifier.
摘要:
The invention relates to a method and a device for operating an optical transmitting device having a plurality of optical transmitters that can be driven independently. The method includes detecting the parameter values of the individual transmitters, comparing the parameter values determined with one another and/or with a prescribed comparison value, and selecting one of the transmitters for the communication operation of the transmitting device based on the comparison. The method further includes operating the transmitting device with the selected transmitter.
摘要:
A method which provides a very simple way of forming a control signal if the frequencies differ too greatly from one another between a useful signal and a reference signal. A control signal is produced which indicates that the frequency error between the frequencies of a useful signal and the frequency of a reference signal exceeds a prescribed error limit value, where the useful signal and the reference signal are used to produce a pulsed signal whose pulse length is proportional to the frequency difference between the useful signal and the reference signal. The pulse length is then compared with a prescribed maximum pulse length, and the control signal is produced if the pulse length exceeds the prescribed maximum pulse length.
摘要:
A receiver circuit is disclosed which enables a reception signal fed into the receiver circuit by a reception element to be processed—e.g. amplified—with little to no errors The receiver circuit has a cascode circuit on an input side, which cascode circuit generates an output signal from the reception signal of the reception element. Control means that act on the cascode circuit are connected to the cascode circuit. The control means are configured in such a way that they counteract an increase in a high level of the output signal of the cascode circuit on account of an excessively large input signal from of the reception element.
摘要:
The invention is related to an optical emission module having a particularly high degree of reliability. The emission module includes a redundant optical emission module having at least two emission elements and having a control device, which is connected to the at least two emission elements. According to the invention, in the emission mode, the control device respectively switches at least one of the emission elements to the active state and at least one of the other emission elements to the passive state.
摘要:
According to the invention, a duty cycle correction device is disclosed. The duty cycle correction device corrects the duty cycle value of a data signal as a function of a digital control signal that is applied to a control input of the duty cycle correction device, and forms a corrected data signal at a signal output. The circuit has a digital duty cycle detector that is connected to the signal output and to the control input of the duty cycle correction device. The circuit determines the actual duty cycle value of the corrected data signal, and produces the digital control signal for the duty cycle correction device such that the discrepancy between the respective actual duty cycle value and a predetermined duty cycle value is a minimum. The duty cycle detector contains a digital integrator for forming the control signal.
摘要:
The invention is based on the object of specifying a drive device for a light-emitting component in which fluctuations in the output power of the light-emitting component on account of measurement errors of the assigned photodetector, in particular on account of “monitor tracking errors”, are avoided. This object is achieved according to the invention by means of a drive device (10) for a light-emitting component (20) having a reference source (30), which generates a power stipulation signal (UREF1) stipulating a desired light power, having a photodetector (40) for measuring the actual light power of the light-emitting component, having a regulating device (50), which is connected to the photodetector (40) and the reference source (30) and generates a regulating signal (I1), which regulates the light power of the light-emitting component (20), in such a way that the deviation between the desired light power and the measured actual light power becomes minimal, and having a correction device (60), which compensates for a temperature-dictated measurement error of the photodetector (40) by modifying, in a temperature-dependent manner, the power stipulation signal (UREF1) generated by the reference source (30).
摘要:
The invention relates to a circuit arrangement for operating a laser diode, having: a laser driver, to which a differential input signal is applied and which provides a differential output signal comprising a first output signal and a second output signal that is the inverse of the first output signal, which are provided at a first and a second laser driver output; a first laser diode, which is connected to the first laser driver output and to which the first output signal is applied; and a second laser diode, which is connected to the second laser driver output and to which the second output signal is applied. In this case, the load provided at the first laser driver output and the load provided at the second laser driver output are essentially identical. This has the effect that the supply current of the laser driver is essentially constant and, therefore, a high-frequency interference signal that effects an interference emission is not applied to said supply current. Only the light of a laser diode is utilized for information transmission.
摘要:
The invention relates to an optoelectronic module having at least one leadframe, at least one carrier element connected to the leadframe, and at least one optoelectronic component connected to the carrier element, which component can emit and/or receive light. The invention furthermore relates to a method for producing an optoelectronic module that includes providing at least one leadframe, at least one carrier element and at least one optoelectronic component, connecting the optoelectronic component to the carrier element and connecting the carrier element to the leadframe, and at least partly encapsulating the optoelectronic component, the carrier element and the leadframe with a plastic.
摘要:
A receiver circuit having at least one amplifier device for amplification of a data signal which is applied to the input side of the receiver circuit, and having a control device which measures the data rate of the data signal and sets the bandwidth of the amplifier device such that the bandwidth of the amplifier device corresponds to the data rate of the data signal.