Apple

PLL Design Engineer

Apple$120K — $160K *
Telecommunications & Hardware
Less than 5 years of experience
Job Overview by Ladders

Qualifications

  • BSEE degree required.
  • 5-7 years of experience in PLL design.
  • Expertise in fractional-N PLLs, Digital PLLs, sigma-delta PLLs, and VCOs.
  • Strong grasp of loop design factors (phase noise, lock time).
  • Knowledge of device physics to optimize PLL block performance.
  • Proficiency in Cadence Virtuoso, SpectreRF, and/or C/Matlab/VerilogA.
  • Familiar with digital design and AI/ML optimization techniques.

Responsibilities

  • Design and implement PLL circuits and associated RF/mixed-signal blocks.
  • Conduct transistor-level feasibility studies for new designs.
  • Simulate and model analog solutions for wireless chips.
  • Drive innovation in silicon development for cellular transceivers.
  • Collaborate with production test engineers on test plans and design for testability.
  • Stay updated on industry trends and technologies to enhance design processes.

Benefits

  • Access to cutting-edge technology and resources.
  • Opportunities for professional development and training.
  • Collaborative work environment with skilled engineers.
  • Impact on products reaching millions of customers.
Full Job Description
We are seeking a highly skilled PLL Design Engineer to join our engineering team. The ideal candidate will possess strong analytical abilities, a passion for innovation, and extensive experience in designing and implementing PLL architectures and circuits.\nIn this highly visible role, you will drive innovation within a silicon design group with a critical impact on getting functional products to hundreds of millions of customers quickly.

Our team is responsible for all aspects of silicon development for cellular transceivers, with a particular emphasis on highly integrated and efficient designs and technologies that transform the user experience at the product level. You will utilize your virtuoso knowledge to design PLL Circuits and component blocks including some of the following: PLL, VCO, LO generation, Dividers, Charge Pumps, XTAL, and other RF/mixed-signal blocks. In addition to the above responsibilities, you will utilize your technical analysis skills to conduct transistor-level feasibility studies for new RF circuit architectures, as well as be responsible for simulation and modeling to design and develop analog and mixed signal solutions for next-generation wireless chips.

BSEE required.

Experience designing fractional-N PLLs, Digital PLLs, sigma-delta PLLs, and VCOs. Strong knowledge of loop design to optimize for phase noise/jitter, lock time, reference spur, area, power, etc. Understanding of device physics and demonstrated ability to apply that to optimize noise, power, area, frequency of PLL blocks. Knowledge of bandgaps, bias, opamps, LDOs, feedback, and compensation techniques. Should be familiar with Cadence Virtuoso, SpectreRF, and/or C/Matlab/VerilogA modeling. Familiarity with various RF transceiver architectures and their trade-offs is considered a plus. Bring-up and debugging skills, and experience in working with production test engineers to build test plans and design for testability. Ability to stay up to date with industry trends and new technologies to drive continuous improvement. Familiarity with digital design, digital verification, and system-verilog modeling. Familiarity with AI/ML optimization and automation flows.

About Apple

Apple is a corporation that designs, manufactures, and markets mobile communication and media devices, personal computers, portable digital music players, and sells a variety of related software, services, peripherals, networking solutions, and third-party digital content and applications. Apple provides many products and services, including iPhone; iPad; iPod; Mac; Apple TV; a portfolio of consumer and professional software applications; the iOS and OS X operating systems; iCloud; and accessories, service, and support offerings. It sells its products worldwide through its retail stores, online stores, direct sales force and third-party cellular network carriers, wholesalers, retailers, and value-added resellers to the consumer and also sells third-party iPhone, iPad, Mac and iPod compatible products, including application software and accessories through its online and retail stores. Introduced in 1984, the Macintosh was the first widely sold personal computer with a graphical user interface (GUI). That feature and others such as an improved floppy drive design and a low-cost hard drive that made data retrieval faster helped Apple cultivate a reputation for innovation. Apple was named as the most admired company in the United States in 2008 and in the world from 2008 to 2012 by the Fortune magazine. The company was founded by Steven Paul Jobs, Steve Wozniak, and Ronald Gerald Wayne on April 1, 1976, and is headquartered in Cupertino, California.

Apple Careers

Join Apple, a place where extraordinary people gather to do their best work. Our ever-expanding global team is at the forefront of innovation and leadership in the tech industry. At Apple, we're not just building products—we're crafting the kind of wonder that revolutionizes entire industries. It's the diversity of our people and their ideas that inspires the innovation that runs through everything we do, from amazing technology to industry-leading environmental efforts. Work You’ll Do Embark on a journey with Apple’s market-leading team to help some of the world’s most influential companies navigate their path to digital mastery with cutting-edge technology and services. Transform industries and touch lives with your unique ideas at Apple. Here, you’ll lead through a unique position at the intersection of technology, creativity, and robust industry expertise. Collaborate with a global team of professionals who are at the top of their game in technology and design. Apple isn’t just a company, it’s a community of innovators and passionate thinkers. Introducing the Apple Innovation and Leadership Initiative We are building a market-leading team to drive our efforts in delivering groundbreaking solutions and services. At Apple, job opportunities are abundant, offering you the chance to explore diverse roles from engineering to marketing, all designed to empower your career growth. Do Innovative Work Join the largest group of creative and technical experts in the world—professionals dedicated to redefining what’s possible through technology and innovation. Deliver targeted solutions through a depth and breadth of expertise that’s unmatched, driving forward our commitment to excellence and leadership in every project we undertake. Be Part of a Great Team Engage in a wide range of projects utilizing Apple’s technology and resources. Harness the unparalleled capabilities, global scale, and joint solution development that only Apple can offer. Future-Proof Your Career Advance your career with limitless opportunities at Apple. Go as far as your ambition takes you with unmatched training, development, and certification support. Explore Discover how Apple is leading the way in tech innovation: [With iOS] Businesses can streamline operations and enhance customer interactions... READ MORE Smart home technology integration that sets the standard for convenience and security... READ MORE The Apple Experience Our combined service capabilities, global scale, and joint solution development help clients overcome challenges and lead transformation in their industries. Clients worldwide look to Apple for new strategies and solutions that drive growth and innovation in the digital era. Stay Connected Join Our Team Search open positions that match your skills and interests. We look for passionate, curious, creative, and solution-driven team players. Whether you’re seeking a professional role, an internship, or a leadership position, Apple offers a variety of employment opportunities. SEARCH APPLE JOBS Keep Up to Date Stay ahead with career tips, insider perspectives, and industry-leading insights you can put to use today—all from the people who work here. READ CAREERS BLOG Job Alert Emails Personalize your subscription to receive job alerts, latest news, and insider tips tailored to your preferences. See what exciting and rewarding opportunities await at Apple, a company committed to diversity, innovation, and leadership. Explore job opportunities, employment benefits, and the culture of growth and innovation at Apple. Prepare your resume, hone your interview skills, and ready yourself for a career at one of the most prestigious companies in the world. Join us in pushing the boundaries of what is possible.
Learn more about Apple
Size
154,000 employees
Market Cap
$2,074.3 billion
Industry
Net Income
$63.9 billion
Founded
1976
5 Year Trend
+11.5%
Revenue
$294.1 billion
NASDAQ

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