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PLL Design Engineer

Company: Apple Inc.
Location: Cupertino
Posted on: June 12, 2021

Job Description:

At Apple, we work every single day to craft products that enrich people's lives. Do you love working on challenges that no one has solved yet? Do you like changing the game? We have an opportunity for a forward-thinking and especially talented PLL Designer. As a member of our multifaceted group, you will have the rare and rewarding opportunity to craft upcoming products that will delight and inspire millions of Apple's customers every day!

Apple Silicon Engineering is seeking qualified PLL designers to work on the next generation PLLs for Apple's world-leading systems-on-chip (SOCs). You will be part of a growing analog/mixed-signal team involved in design and productization on leading-edge CMOS process technology nodes.

Key Qualifications

  • Understand system level requirements to create overall PLL specifications.
  • Create behavioral models of PLL to drive architectural decisions and derive block-level requirements for analog and digital blocks.
  • Work closely with mask design team to implement layout view of designs.
  • Complete top-level spice and mixed-mode simulations to validate top-level integration.
  • Run pre-tapeout verification flows to confirm design meets performance, power, reliability and timing requirements.
  • Define production/bench-level test plans for post-silicon characterization.
  • Work with lab engineers in taking lab measurements to validate IP.
  • Review ATE and lab test results to resolve yield issues and drive bug fixes.
  • Work with system teams in system bringup and debug.
  • Hold design reviews of blocks with peers/management to show design meets spec targets and requirements.


The ideal candidate should have proven taking chips to production with experience in the following areas:

Dual charge-pump PLL designs, Fractional-N PLLs, spread-spectrum PLLs, Digital PLL techniques, etc. High speed digital circuit design and analysis (e.g., STA, formal verification). Digitally assisted analog circuit and techniques. Good knowledge of band gaps, bias, op-amps, LDOs, feedback and compensation techniques. Experience in VCO design including but not limited to LC VCOs. Lab and ATE test plans and measurement for characterization, and volume production.

Education & Experience

MSEE 3+ yrs in related area of expertise or PhD

Keywords: Apple Inc., Cupertino , PLL Design Engineer, Other , Cupertino, California

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