ByteDance seeks a PLL (Phase-Locked Loop) Analog/Mixed Signal Designer to contribute to the design and development of CPUs for its data center servers.  Responsibilities include designing and modeling high-speed PLL circuits at system and circuit levels; developing analog circuits such as VCOs, charge pumps, loop filters, and dividers; custom circuit design in deep-submicron and FINFET CMOS technologies; creating high-speed circuits and clock distribution paths; performing schematic entry and SPICE simulations; and collaborating with cross-functional teams.  The ideal candidate will possess strong PLL design experience, proficiency in analog circuit design, and expertise in high-speed circuit design using deep-submicron and FINFET CMOS technologies. The role involves working with layout engineers, performing post-layout simulations, and optimizing design performance and reliability. This position is crucial to the development of high-performance, energy-efficient, and reliable chips for ByteDance's data center infrastructure.

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<div class="jobDetail__1UFk5 jobDetail" style="transform: translate(0px, 0px); opacity: 1;"><div class="block-title">Responsibilities</div><div class="block-content">About the team:
This team is at the forefront of technological innovation, specializing in the design, development, and production of CPUs for ByteDance data center servers. Leveraging a team of highly skilled engineers, researchers, and experts, the unit focuses on creating high-performance, energy-efficient, and reliable chips that power a wide range of electronic devices and systems.

 Responsibilities 
- Design and model PLL circuits at high speed or above at both system and circuit levels.
- Develop analog circuits, including VCOs (high speed, ring preferred and/or LC), charge pumps, loop filters, voltage regulators, PFDs, and dividers.
- Custom design circuits in deep-submicron and FINFET CMOS technologies.
- Create high-speed circuits such as dividers and clock distribution paths.
- Perform schematic entry and SPICE simulation of custom circuits.
- Collaborate with cross-functional teams to optimize design performance and reliability.
- Supervise layout engineers for circuit layout and conduct post-layout simulations with LPE fixes.</div><div class="block-title">Qualifications</div><div class="block-content">Minimum Qualifications:
- MS in Electrical Engineering or a related field.
- Hands-on experience with PLL design.

Preferred Qualifications:
- 5 years of experience in analog circuit design.
- MS/PhD in Electrical Engineering or a related field with 5 years of experience.
- Direct experience in PLL design.
- In-depth knowledge of PLL loop operation and design.
- Experience in designing PLL circuit components such as VCOs (high speed, ring preferred and/or LC), charge pumps, loop filters, regulators, PFDs, and dividers.
- Proficiency in designing high-speed circuits and working with deep-submicron and FINFET CMOS technologies.
- Experience with schematic entry in Cadence Custom Designer or similar tools.
- Knowledge of digital timing in PrimeTime and/or Nanotime is a plus.

#LI-MZ3</div><div class="block-title">Job Information</div><div class="block-content block-content-jobinfo"><div class="job-info-item__UZSBL job-info-item-lang__3Il6m"><span>【For Pay Transparency】Compensation Description (Annually)</span><div class="template__2vEr7"><div class="editor-content" style="font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Helvetica Neue', Helvetica, Arial, sans-serif, 'Roboto', 'Apple Color Emoji', 'Segoe UI Emoji', 'Segoe UI Symbol'; color: #1f2329; word-wrap: break-word; white-space: pre-wrap;"><p style="font-size: 14px; text-align: left;">The base salary range for this position in the selected city is $184300 - $389500 annually.<span>​</span></p><p style="font-size: 14px; text-align: left;">Compensation may vary outside of this range depending on a number of factors, including a candidate’s qualifications, skills, competencies and experience, and location. Base pay is one part of the Total Package that is provided to compensate and recognize employees for their work, and this role may be eligible for additional discretionary bonuses/incentives, and restricted stock units.<span>​</span></p><p style="font-size: 14px; text-align: left;">Benefits may vary depending on the nature of employment and the country work location. Employees have day one access to medical, dental, and vision insurance, a 401(k) savings plan with company match, paid parental leave, short-term and long-term disability coverage, life insurance, wellbeing benefits, among others. Employees also receive 10 paid holidays per year, 10 paid sick days per year and 17 days of Paid Personal Time (prorated upon hire with increasing accruals by tenure).<span>​</span></p><p style="font-size: 14px; text-align: left;">The Company reserves the right to modify or change these benefits programs at any time, with or without notice.<span>​</span></p><p style="font-size: 14px; text-align: left;">For Los Angeles County (unincorporated) Candidates:<span>​</span></p><p style="font-size: 14px; text-align: left;">Qualified applicants with arrest or conviction records will be considered for employment in accordance with all federal, state, and local laws including the Los Angeles County Fair Chance Ordinance for Employers and the California Fair Chance Act. Our company believes that criminal history may have a direct, adverse and negative relationship on the following job duties, potentially resulting in the withdrawal of the conditional offer of employment:<span>​</span></p><p style="font-size: 14px; text-align: left;">1. Interacting and occasionally having unsupervised contact with internal/external clients and/or colleagues;<span>​</span></p><p style="font-size: 14px; text-align: left;">2. Appropriately handling and managing confidential information including proprietary and trade secret information and access to information technology systems; and<span>​</span></p><p style="font-size: 14px; text-align: left;">3. Exercising sound judgment.<span>​</span></p></div></div></div><div class="job-info-item__UZSBL job-info-item-lang__3Il6m"><span>About Us</span><div class="template__2vEr7"><div class="editor-content" style="font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Helvetica Neue', Helvetica, Arial, sans-serif, 'Roboto', 'Apple Color Emoji', 'Segoe UI Emoji', 'Segoe UI Symbol'; color: #1f2329; word-wrap: break-word; white-space: pre-wrap;"><p style="font-size: 14px; text-align: left;">Founded in 2012, ByteDance's mission is to inspire creativity and enrich life. With a suite of more than a dozen products, including TikTok, Lemon8, CapCut and Pico as well as platforms specific to the China market, including Toutiao, Douyin, and Xigua, ByteDance has made it easier and more fun for people to connect with, consume, and create content.<span>​</span></p></div></div></div><div class="job-info-item__UZSBL job-info-item-lang__3Il6m"><span>Why Join ByteDance</span><div class="template__2vEr7"><div class="editor-content" style="font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Helvetica Neue', Helvetica, Arial, sans-serif, 'Roboto', 'Apple Color Emoji', 'Segoe UI Emoji', 'Segoe UI Symbol'; color: #1f2329; word-wrap: break-word; white-space: pre-wrap;"><p style="font-size: 14px; text-align: left;">Inspiring creativity is at the core of ByteDance's mission. Our innovative products are built to help people authentically express themselves, discover and connect – and our global, diverse teams make that possible. Together, we create value for our communities, inspire creativity and enrich life - a mission we work towards every day.<span>​</span></p><p style="font-size: 14px; text-align: left;">As ByteDancers, we strive to do great things with great people. We lead with curiosity, humility, and a desire to make impact in a rapidly growing tech company. By constantly iterating and fostering an "Always Day 1" mindset, we achieve meaningful breakthroughs for ourselves, our Company, and our users. When we create and grow together, the possibilities are limitless. Join us.<span>​</span></p><p style="font-size: 14px; text-align: left;">Diversity &amp; Inclusion<span>​</span></p><p style="font-size: 14px; text-align: left;">ByteDance is committed to creating an inclusive space where employees are valued for their skills, experiences, and unique perspectives. Our platform connects people from across the globe and so does our workplace. At ByteDance, our mission is to inspire creativity and enrich life. To achieve that goal, we are committed to celebrating our diverse voices and to creating an environment that reflects the many communities we reach. We are passionate about this and hope you are too.<span>​</span></p></div></div></div><div class="job-info-item__UZSBL job-info-item-lang__3Il6m"><span>Reasonable Accommodation</span><div class="template__2vEr7"><div class="editor-content" style="font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Helvetica Neue', Helvetica, Arial, sans-serif, 'Roboto', 'Apple Color Emoji', 'Segoe UI Emoji', 'Segoe UI Symbol'; color: #1f2329; word-wrap: break-word; white-space: pre-wrap;"><p style="font-size: 14px; text-align: left;">ByteDance is committed to providing reasonable accommodations in our recruitment processes for candidates with disabilities, pregnancy, sincerely held religious beliefs or other reasons protected by applicable laws. If you need assistance or a reasonable accommodation, please reach out to us at <span>​</span></p></div></div></div></div></div>

PLL (Phase-Locked Loop) Analog/Mixed Signal Designer