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Altera_Forum
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15 years ago

Transceiver Pseudo-CML equivalent circuit?

I'm currently testing with the Stratix IV GX development kit and would like to know if anyone has details on the equivalent circuit for the transmitter. A CML driver typically consists of a dif...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
15 years ago

Just to follow-up on the transmitter side of this discussion, the attached LTSpice circuit shows how two current sources at the transmitter can be used to get signal high/low voltages pretty close to those measured for the VOD default setting of 3, i.e., with 7.5mA current source, Vhigh = 920mV, Vlow = 550mV.

Cheers,

Dave