Cml driver circuit

CML driver circuit is an essential part of high-speed serial interfaces. [ ] Key Method The pre-emphasis circuit include emphasis circuit and adjust the emphasis range circuit. Designed and verified in Cadence IC, the proposed circuit’s output swing is mV, the bit rate can reach Gbps, the power consumption is mW, emphasis can achieve dB.  · The driver circuit , includes a CML driver , , respectively, and a level shifting mechanism (LSM) , , respectively. As described earlier, the current mode logic (CML) driver , generates a drive waveform that includes a common mode voltage (VCM) (e.g., VCM and VCM ). V/V CML Line Driver/Receiver with Fail-Safe The circuit is designed to meet the DC specifications shown in the above table after thermal equilibrium has been established. Micrel, Inc. SYR June 4 MA hbwhelp@www.doorway.ru or ()

The principle difference between CML and ECL as a link technology is the output impedance of the driver stage: the emitter follower of ECL has a low resistance of around 5 ohms whereas CML connects to the drains of the driving transistors, that have a high impedance, and so the impedance of the pull up/down network (typically 50 ohm resistive) is the effective output impedance. Having a drive impedance that is closer to the characteristic impedance of the driven line greatly reduces. The CML interface drivers provide several design features, including high-speed capabilities, adjustable logic output swing, level adjustment, and adjustable slew rate. Current Texas Instruments serial gigabit solution devices that have an integrated CML driver are the TLK, TLK, TLK, and TLK CML Output Stage. Interfacing between CML and LVDS HOTLink II devices can be interfaced to standard LVDS devices easily. The following sections describe suggested methods and circuits for implementing a link from: an LVDS output to a CML input. a CML output to an LVDS input. LVDS Output to CML Input Interfacing from LVDS to the HOTLink II is straightforward.

CML circuits can operate with low signal voltages and higher operating frequencies an OR gate, a data buffer, a XOR gate, a data latch, and a flip-flop. Circuits and Systems. Spring Lecture 5: Termination, TX Driver, Multiplexer Circuits CML Driver w/ Higher Output Stage Supply. limiting amplifier, CML buffer and output voltage-peaking circuit. Several wide-band techniques for this work are adopted to broaden.