摘要:
The present invention relates to a coupling arrangement for phantom-mode transmission over a wired loop plant. In accordance with an embodiment of the invention, the coupling arrangement comprises adders (Σ1Α, Σ2Α, Σ1Β, Σ2Β) for adding a common-mode signal (+VC, -VC) to a differential -mode signal ( (+VA, -VA), (+VB, -VB)), and amplification units (AMP2A, AMP2B) for individually and evenly amplifying input signals present on their input terminals, thereby yielding amplified common-and-differential -mode signals ((+VA'+VC', -VA'+VC'), (+VB' -VC', -VB' -VC')), and coupling units (COUP2A, COUP2B) with capacitive coupling (C3A, C4A, C3B, C4B) for passing the amplified common-and-differential-mode signals towards a wire pair (L1, L2). The present invention also relates to a line termination unit or an access node including a coupling arrangement according to the invention.
摘要:
Embodiments of the invention are generally directed to systems, methods, and apparatuses for time-multiplexed dynamic on-die termination. In an embodiment, an integrated circuit receives, during a first clock, an on-die termination (ODT) activation signal at its ODT pin. The integrated circuit also receives, during a second clock, an ODT value selection signal on its ODT pin. In an embodiment, the integrated circuit prevents a reset of the state of the ODT activation signal for a predetermined period of time to enable the multiplexing of signals on the ODT pin. Other embodiments are described and claimed.
摘要:
Processing a received optical signal in an optical communication network includes equalizing (322) a received optical signal to provide an equalized signal, demodulating (323) the equalized signal according to an m-ary modulation fornat to provide a demodulated signal, decoding (323) the demodulated signal according to an inner code to provide an inner decoded signal, and decoding (324) the inner decoded signal according to an outer code. Other aspects include other features such as equalizing an optical channel including storing channel characteristics during a waiting period between bursts on the channel, and equalizing a received burst from the client using the loaded channel characteristics.
摘要:
A method and apparatus for selectably providing single-ended (210, 211) and differential signaling (205) with controllable impedance and transition time is provided. According to the method and apparatus, a differential signal can be transmitted over two wires or two single-ended signals can be transmitted over the two wires (208, 209). According to the method and apparatus, termination may be selected among a single-reference termination, a center termination, or a high-impedance termination. Regardless of the type of termination selected, a capability for dynamic control of the termination impedance is provided. Moreover, an ability to change impedances of termination elements to maintain a desired termination impedance for both single-reference termination and center termination modes by shifting bits is provided. Also, a capability for dynamic control of transition times of signals is provided.
摘要:
The present invention relates to an arrangement for data transmission in an expandable modular system (200, 400), preferably for point-to-multipoint transmission, formed of a plurality of structurally and electrically connectable modules (210a-210c, 410a-410b), between each module being located databus connectors (220, 420, 225, 425), which under operation allow connection and disconnection of the modules, each databus connector being connected to a driver (250) and a receiver (260) arrangement, each comprising output and input channels, said outputs being connected to said inputs. Thus for each module said arrangement comprises a signal termination arrangement (270, 270', 270'', 270''') arranged outside said driver and receiver between said output channels of the driver arrangement (250) and the input channels of the receiver arrangement (260).
摘要:
The present invention relates to an arrangement for data transmission in an expandable modular system (200, 400), preferably for point-to-multipoint transmission, formed of a plurality of structurally and electrically connectable modules (210a-210c, 410a-410b), between each module being located databus connectors (220, 420, 225, 425), which under operation allow connection and disconnection of the modules, each databus connector being connected to a driver (250) and a receiver (260) arrangement, each comprising output and input channels, said outputs being connected to said inputs. Thus for each module said arrangement comprises a signal termination arrangement (270, 270', 270'', 270''') arranged outside said driver and receiver between said output channels of the driver arrangement (250) and the input channels of the receiver arrangement (260).
摘要:
The invention relates to an active impedance converter circuit with a first side with complex impedance and a second side with complex/resistive impedance. The impedance converter is provided with an amplifier (15, 16, 17, 19; 15a, 15b, 16a, 16b, 17a, 17b, 19) which input is connected to said first side of the circuit. The amplifier is adapted to provide low gain for low frequency signals and to change over to provide more gain for high frequency signals. The invention also relates to a splitter for splitting a subscriber line into a first transmission branch including a low pass filter and a second transmission branch including a high pass filter. The invention also comprises a termination of a twisted pair telephone transmission line for delivering two-way service including low frequency band telephone signals and high frequency band digital subscriber line signals.
摘要:
An inherently balanced electrical supply system for a bus (202) provides improved reliability for bus termination in computer systems. The apparatus includes a single current source (212) that is fed into a feeder line (216, 218) connected to opposite ends of the bus (202) at about the midpoint of the feeder line, dividing the path into two equal-length segments (216, 218). Integrated circuit chips (208) connected to the bus, when switched on, draw esentially equal amounts of current through each feeder segment, creating substantially equal voltage drops at each end of the bus.
摘要:
The invention includes a terminating circuit or network (4) which is connected to a signal transmission medium in the form of one or two conductors or lines (2, 3) on which information-carrying signals in the form of voltage pulses can be transmitted, and a impedance-matching circuit (4a) connected to the conductor or conductors. The circuit includes a mean voltage value forming unit which produces a mean voltage value, a control unit which produces adapted reference voltage value, and an impedance-matching transistor which is included in said impedance-matching circuit, wherein said voltage value and said reference voltage value are added together to form a composite control voltage which is applied to the gate-connection of the impedance matching transistor.