Senior RFIC-PLL Designer

1 week ago


San Diego, California, United States Apple Full time

Role Overview

We are seeking a highly skilled Senior RFIC-PLL Designer to join our Wireless Radio team at Apple. As a key member of our team, you will be responsible for designing and developing analog and digital PLL solutions for wireless SoC, driving them to mass production for Apple's Wireless Connectivity products.

Key Responsibilities

  • Lead the design of radio transceiver chains, including analog PLLs, VCOs, digital PLLs, DCOs, LOGen, and chain of blocks in RX and TX for wireless connectivity products.
  • Drive radio KPIs (power, area, performance) to meet product requirements.
  • Collaborate with cross-functional teams, including platform architecture, wireless design, RF HW and SW, to define radio features enabling wireless innovation.
  • Work closely with RF Systems to block-level and high-level specifications of the PLL-LOGen, TX, and RX lineups, and proper distribution of spec margins in the chain.
  • Contribute to hand-on design, starting from concept, architecture, and topology to transistor-level feasibility studies and KPI tradeoff analysis, actual design, simulations, and extractions.
  • Design RF and Analog loopbacks for calibration and compensation.
  • Work through Co-Existence scenarios and design to meet CoEx requirements.
  • Oversee floorplan layout and verification of the design to ensure a successful tapeout.
  • Closely collaborate with RFIC test engineers in the bring-up, debug, and optimization of the wireless connectivity chip through productization.
  • Provide design versus silicon measurements correlation and compliance with specification for volume production.

Requirements

  • Typically requires 3+ years of RF/analog and mixed-signal design experience in cutting-edge RF CMOS design.
  • Direct experience in designing and bringing into mass production of wireless transceivers in deep sub-micron RFCMOS technology.
  • Experienced in design and development of fractional N Synthesizers, Digital PLLs, Analog PLLs, LO-Gen for high-performance applications and low-power applications.
  • Hands-on experience in designing TDC, GRO, Digital Filters, Sigma Delta Modulators, Pre-scalers, and MMD, DCOs, PFD-CP, and VCOs.
  • Modeling, analysis, and design of SD noise cancellation and spur cancellation techniques.
  • Deep understanding of analog, mixed-signal, and RF circuit design, including LNAs, PAs, mixers, baseband filters, VGAs, and calibration methods associated with high-performance wireless systems.
  • Familiarity with various RF transceiver architectures and their trade-offs, system specifications, and ability to work with system architects to translate system requirements into circuit requirements at IC level.
  • Experienced in Cadence Virtuoso, Spectre RF, Matlab, EM simulation (EMX, HFSS), and similar tools.
  • Familiarity with mixed-signal mode verification methodology (SystemVerilog, AMS, Nanotime).
  • Demonstrated capability to work with digital design group for an optimum partition between digital and analog domain, timing requirements.
  • Extensive experience in fractional N synthesizer and LOGen silicon characterization and debug.

Education & Experience

  • BS and 3+ years of relevant industry experience. MSEE and PhD is preferred.

Additional Requirements

Apple is an equal opportunity employer that is committed to inclusion and diversity. We take affirmative action to ensure equal opportunity for all applicants without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability, Veteran status, or other legally protected characteristics.

Apple employees also have the opportunity to become an Apple shareholder through participation in Apple's discretionary employee stock programs. Apple employees are eligible for discretionary restricted stock unit awards, and can purchase Apple stock at a discount if voluntarily participating in Apple's Employee Stock Purchase Plan.

Benefits include comprehensive medical and dental coverage, retirement benefits, a range of discounted products and free services, and for formal education related to advancing your career at Apple, reimbursement for certain educational expenses - including tuition.



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