Astera Labs Interview Question

Explain; 1. What causes ISI 2. What causes Jitter

Interview Answer

Anonymous

Feb 22, 2026

1. (My response was rooted in channel loss(conductors and dielectric), PDN impedance droop(which results in supply droop and causes gates to slow down). He gave me some bogus answers regarding BERT data pattern 2. I told him about noise getting coupled into the PLL power supply, ground bounce. He went on to talk about reference clock. Overall a negative experience. My advice would be for anyone looking to interview- Run don't walk. Their Stock is trading at 128.67 which is ridiculously over-priced based on their recent wins with M$FT and AMZN. But CXL 3.0 is heating up with both Marvell and MCHP making retimers that would compete with Astera's offerings.