Abstract:
A system capable of transmitting and receiving high frequency video signals across various lengths of a twisted pair cable while maintaining video quality is presented. The system includes a transmitter and a receiver tandem coupled together over twisted pair cable. Each video component is mixed with a reference signal in the transmitter and driven differentially onto the twisted pair cable. Upon detection of a signal in the twisted pair cable, the receiver adjusts its internal gains until the known characteristic of the reference signal is achieved. The receiver then automatically adjusts the skew & DC offset. Thus, the receiver is able to automatically measure the degradation in video quality and appropriately compensate the video signals for the accumulated degradation caused primarily by the transmission between the transmitter and the receiver. The compensated video may subsequently be provided to a video display device.
Abstract:
Fast settling circuits and methods designed to align input signal amplitude level and to remove DC offset voltages with minimal loss of low frequency signal in receiving analog circuits are disclosed. With the key innovative circuits and methods for signal peak alignment, the disclosed circuits and methods achieve fast settling without significant attenuation of the input signal. Peak aligning circuits and methods can be implemented along with conventional RC AC coupling circuits. In applying the aligning circuits and methods to differential signal pair, DC offsets can be easily removed.
Abstract:
A system including a circuit configured to receive differential signals on differential signal lines and provide DC voltages to the differential signal lines in response to a restore pulse.
Abstract:
Es wird ein Kommunikationssystem (1) mit einem Sender (2) und einem Empfänger (3) jeweils mit einer unidirektionalen Schnittstelle (21, 31) und einer zwischen Sender (2) und Empfänger (3) verbindbaren unidirektionalen Übertragungsleitung (4) beschrieben, wobei der Empfänger eine Prüf- und eine Auswerteschaltung (34) umfasst, und der Sender (2) eine Sendeeinrichtung (22) und eine Diagnoseeinrichtung (23) umfasst. Damit möglichst einfach und kostengünstig der Sender vom Empfänger (3) Informationen, in der Gegenrichtung einer unidirektionalen Signalermittlung erhält, sind von der Sendeeinrichtung (22) sendbare Signale von einer Mitteilungseinrichtung (32) des Empfängers (3) als Sendeinformation zur eigenen Zustandsmitteilung veränderbar und sind an der senderseitigen Schnittstelle (21) von der Detektoreinrichtung (230) detektierbar.
Abstract:
The invention relates to an interfacing device for pseudo-differential transmission through interconnections used for sending a plurality of electrical signals. The interfacing device of the invention comprises signal terminals (101) and a common terminal ( 100). A transmitting circuit (5) receives the "input signals of the transmitting circuit" coming from a source (2). The output of the transmitting circuit (5) delivers, when the transmitting circuit is in the activated state, voltages between one of said signal terminals (101) and said common terminal (100). A receiving circuit (6) delivers, when the receiving circuit is in the activated state, "output signals of the receiving circuit" determined each by the voltage between one of said signal terminals (101) and said common terminal (100), to the destination (3). The balancing circuit (9) is such that, when the transmitting circuit is in the activated state, the current flowing out of the common terminal (100) approximates the opposite of the sum of the currents flowing out of the signal terminals (101).
Abstract:
Fast settling circuits and methods designed to align input signal amplitude level and to remove DC offset voltages with minimal loss of low frequency signal in receiving analog circuits are disclosed. With the key innovative circuits and methods for signal peak alignment, the disclosed circuits and methods achieve fast settling without significant attenuation of the input signal. Peak aligning circuits and methods can be implemented along with conventional RC AC coupling circuits. In applying the aligning circuits and methods to differential signal pair, DC offsets can be easily removed.
Abstract:
A description is given of an arrangement for compensation of ground offset in a data bus system comprising a plurality of communication devices (2, 10) which are each supplied with an operating voltage (U0) by a voltage source (4; 14), are connected to ground (G1); G2) and have a data bus connection (6; 12) via which they are connected to a data bus line (8). The special thing about the invention is that between operating voltage (U0) and ground (G2) at least one voltage dividing device (R3, R6) is connected whose output is coupled to the data bus connection (12) of at least one communication device (10) and whose voltage dividing ratio is selected such that an offset of the ground (G2) of the communication device (10), whose data bus connection (12) is coupled to the voltage dividing device (R3, R6), is in essence compensated compared to ground (G1) of another communication device (2).