Jitter amplification and DCD can also be understood in the voltage domain: limited bandwidth of the distribution network attenuates the carrier frequency, making the dBc of the phase noise, spurs of the lower sideband larger. From a AM-to-PM conversion perspective, this means larger jitter.
Duty cycle distortion (DCD) can be considered a kind of jitter that is periodic, arising on every alternate clock edge. Thus, it has a frequency equal to that of the clock signal itself. For example, a 10GHz clock signal with DCD will have a spur in its jitter spectrum at 10GHz.
Intuitively, both the PSIJ and RJ can be viewed as interference imposed on the volage transitions, as a result, a sharp edge turns out to be more immune to these types of interferences.
thank you for this incredibly useful summary on jitter in cmos clocks
Posting from my wife's account. I went to description and found out this paper had also contribution from Nijm Wary, same 2012 batch passout.
Jitter amplification and DCD can also be understood in the voltage domain: limited bandwidth of the distribution network attenuates the carrier frequency, making the dBc of the phase noise, spurs of the lower sideband larger. From a AM-to-PM conversion perspective, this means larger jitter.
It also helps to explain the design of DCD correcting butffer
Good video!. May I ask why duty cycle distortion contributes to high-frequency jitter amplification?
Duty cycle distortion (DCD) can be considered a kind of jitter that is periodic, arising on every alternate clock edge. Thus, it has a frequency equal to that of the clock signal itself. For example, a 10GHz clock signal with DCD will have a spur in its jitter spectrum at 10GHz.
@@Microelectronics-ChanCarusone In voltage domain, DCD appears as a dc signal. If my understanding is correct, prof? Thank you!
The long clock distribution wires are extracted by HFSS? How to convert the JIR to the jitter transfer function in slide 16?
Intuitively, both the PSIJ and RJ can be viewed as interference imposed on the volage transitions, as a result, a sharp edge turns out to be more immune to these types of interferences.
Thanks 🙏👍💯😊