difference between CML and CMOS

[HSD_analog]

what are CML based logic circuits ? and CMOS based logic circuits?

 

[elbadry]

This question is too basic. You'd better search on google

 

[jbeniston]

CML is faster, but consumes more current than CMOS.

 

[malizevzek]

in CML your signal is represented by currents and not voltages. CML is faster and sometimes better for routing, but it has some disadvantages, power consumption for instance

 

[DZC]

For higher frequencies (>GHz) CML's power dissapation may be comparable or even less than CMOS.

 

[sparso]

cml input is basically a differential input stage with the
collectors open. So the mail structural difference is CML
most of the time is on a bipolar process.

 

[RFDE]

CML : Current Mode Logic , or sometimes called SCL : Source Coupled Logic

1 - CML is differential circuits rather than single ended circuits as in standard CMOS, and so, it is more immune to common mode noise

2 - CML isn't rail to rail swing as in standard CMOS , this reduced swing helps in adding much less noise to the surrounding analog blocks

3 - CML is prefered in high frequency designs as it is less aggressive to the surrounding sensitive analog blocks , and it is less power consumption than the standard CMOS , however , as technology scales down , below 90 nm , standard CMOS becomes capable of operating at high frequencies with less power consumption