What is meant by current mode logic?
Current mode logic (CML), or source-coupled logic (SCL), is a digital design style used both for logic gates and for board-level digital signalling of digital data .
What is MCML logic?
MOS Current-Mode Logic (MCML) is one of the most widely used logic styles in high-speed circuits such as high-speed processors and Gbps multiplexers for optical transceivers (Cao et al., 2002; Tanabe et al., 2001; Yamashina and Yamada, 1992).
What is CML driver?
CML Driver Direct Connect (DC) to LVPECL The ON Semiconductor ECL Logic Devices with CML OUTPUT Structures easily interconnects directly (DC) to a typical LVPECL receiver input on similar power supplies.
What is CML output?
The CML output consists of a differential pair with 50Ω collector resistors, as shown in Figure 3. The signal swing is supplied by switching the current in a common-emitter differential pair.
Why is CML faster than LVDS?
The CML output transistors are permanently biased in the active region, resulting in the ability for much faster switching than technologies that use saturated transistor operation, such as CMOS or most LVDS implementations.
What is Lvcmos signal?
LVCMOS output signals are used for certain low-powered medical imaging equipment, as well as portable testing and measurement devices, industrial testing equipment, and networking and communication systems. LVCMOS is well-suited to both wireless and wired infrastructure. That covers a lot of ground there.
Is LVDS serial or parallel?
LVDS works in both parallel and serial data transmission. In parallel transmissions multiple data differential pairs carry several signals at once including a clock signal to synchronize the data.
What is a CML buffer?
CMOS current-mode logic buffers were first introduced in [3] to implement a giga-hertz MOS adaptive pipeline technique. the CML circuits can operate with lower signal voltage and higher operating frequency at lower supply voltage than CMOS circuits can. This will pre- pare us to study the design of CMOS buffer chain.
What is LVDS used for?
Also known by its technical specification of TIA/EIA-644, LVDS is a specification used to transmit data at high speeds using voltage differences. In other words, it’s able to transmit information between a computer and LCD by sending specific voltages.
What is CMOS signal?
CMOS gate circuits have input and output signal specifications that are quite different from TTL. For a CMOS gate operating at a power supply voltage of 5 volts, the acceptable input signal voltages range from 0 volts to 1.5 volts for a “low” logic state, and 3.5 volts to 5 volts for a “high” logic state.
What protocols use LVDS?
In addition, LVDS is the physical layer signaling in SCSI standards (Ultra-2 SCSI and later) to allow higher data rates and longer cable lengths. Serial ATA (SATA), RapidIO, and SpaceWire use LVDS to allow high speed data transfer.
What are the requirements of a current-mode logic circuit?
One of the primary requirements of a current-mode logic circuit is that the current bias transistor must remain in the saturation region in order to maintain a constant current. Recently, CML has been used in ultra-low power applications.
What is ECL (electronic current mode logic)?
It is also called as current mode logic. The design of ECL circuit consists of transistors and resistors. By preventing the transistor from entering into saturation, the high-speed operation is achieved in ECL logic family.
What is CML (current mode logic)?
Current mode logic ( CML ), or source-coupled logic ( SCL ), is a digital design style used both for logic gates and for board-level digital signalling of digital data .
What are the different types of logic in CMOS?
The types of logic discussed will be CMOS rail-to-rail logic, CMOS current mode logic (CML), bipolar CML, and bipolar emitter coupled logic (ECL). Note that CML is a general term and applies to both bipolar and CMOS; however, with metal oxide semiconductor (MOS) transistors, it is often called MOS current mode logic (MCML).