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Low-voltage differential signaling (LVDS), also known as TIA/EIA-644, is a technical standard that specifies electrical characteristics of a differential, serial signaling standard. LVDS operates at low power and can run at very high speeds using inexpensive twisted-pair copper cables.
LVDS Digital: YP B P R (a.k.a. component video) 1990s: 3 RCA or BNC connectors, Apple-AAUI, D-Terminal, SCART 21-pin: Analog: 1920 × 1080 @ 60 [9] Consumer electronics: Also referred to as Component video and YUV. D-Terminal uses voltage levels to signal resolution. Digital Visual Interface (DVI) 1999: DVI, Mini-DVI, Micro-DVI: Both: 2560 × ...
Current mode logic (CML), or source-coupled logic (SCL), is a digital design style used both for logic gates and for board-level digital signaling of digital data. The basic principle of CML is that current from a constant current generator is steered between two alternate paths depending on whether a logic zero or logic one is being represented.
A signal transmitted differentially. Notice the increased amplitude at the receiving end. Differential signalling is a method for electrically transmitting information using two complementary signals. The technique sends the same electrical signal as a differential pair of signals, each in its own conductor.
As semiconductor technology has progressed, LVCMOS power supply voltage and interface standards for decreasing voltages have been defined by the Joint Electron Device Engineering Council for digital logic levels lower than 5 volts.
Like LVDS, the data is transmitted serially over the data link. When transmitting video data and used in HDMI, three TMDS twisted pairs are used to transfer video data. Each of the three links corresponds to a different RGB component. The physical layer for TMDS is current mode logic (CML), [2] DC coupled and terminated to 3.3 Volts. While the ...
QSGMII, like SGMII, uses low-voltage differential signaling (LVDS) for the TX and RX data, and a single LVDS clock signal. QSGMII uses significantly fewer signal lines than four separate SGMII connections. QSGMII predates NBASE-T and is used to connect multi-port PHYs to MACs, for example in network routers. [10]
Transmitted signal levels are 0.0–0.3 V for logical low, and 2.8–3.6 V for logical high level. The signal lines are not terminated. High speed (HS) mode uses the same wire pair, but with different electrical conventions. Lower signal voltages of −10 to 10 mV for low and 360 to 440 mV for logical high level, and termination of 45 Ω to ...