Senior Staff Engineer Radio Frequency Design (f/m/div)

Infineon Technologies AG; Villach; On-site; EUR 90,000 - 130,000; Full time

Job summary

Infineon Technologies AG in Austria seeks an experienced RF/Digital-assisted design specialist to drive next-generation Frequency Synthesizers from concept to silicon. You will combine analog/RF expertise with digital-assisted design, collaborating with system architects, digital designers and validation teams.

Responsibilities include defining PLL concepts (Fractional-N, ADPLL), modeling loop dynamics, designing VCOs, prescalers, PFDs and charge pumps, and developing calibration algorithms.

Qualifications

• Education: A degree (Master/PhD preferred) in Electrical Engineering, Microelectronics, or a related field with a focus on RF/microwave design.
• Experience: 5+ years of proven experience specifically focused on RF Digital PLL concept definition, architectural modeling, and circuit design.
• Technical Expertise: Deep understanding of RF design principles, PLL loop theory, microwave engineering, noise analysis (Phase Noise, Jitter), and frequency synthesizer architectures for RF applications. Proficient in advanced CMOS and BiCMOS technologies.
• Tools & Skills: Mastery of RF simulation environments (e.g., Cadence Spectre/SpectreRF, GoldenGate) and behavioral modeling tools (e.g., MATLAB, Simulink, Verilog-A).
• Leadership Skills: Proven technical leadership, mentoring skills, and project coordination capabilities.
• Languages: Fluent in English (written and spoken). Knowledge of German is considered a plus.

Responsibilities

• Define and evaluate RF PLL concepts and architectures tailored for high-frequency wireless applications.
• Develop high-level behavioral models to analyze and optimize RF PLL loop dynamics, jitter, spurs, and stringent phase noise performance.
• Translate concepts into high-performance RF and mixed-signal circuits, focusing on blocks such as VCOs/DCOs, prescalers, Phase-Frequency Detectors, and Charge Pumps, TDC, DTC.
• Architect and verify digital calibration algorithms for PLL (spur mitigation, mismatch compensation, TDC, DTC calibrations) to enhance RF performance.
• Partner closely with system architects, digital, and RF frontend teams to optimize mixed-signal and RF system partitioning for transceiver architectures.
• Guide layout engineers to preserve RF signal integrity, minimize parasitics, and support silicon characterization and debugging of RF PLL.

Skills

RF PLL design

Architectural modeling

Circuit design

Noise analysis

CMOS/BiCMOS

RF simulation tools

MATLAB

Verilog-A

Leadership

Fluent English

Education

Master/PhD in Electrical Engineering

Tools

Cadence Spectre

SpectreRF

GoldenGate

Verilog-A

Job description

Join our international RF and mixed-signal design team and drive the development of next-generation Frequency Synthesizers for cutting-edge semiconductor solutions. In this role, you will combine deep analog and RF expertise with digital-assisted design approaches, working closely with system architects, digital designers and validation experts from concept to silicon. Your role

Key responsibilities in your new role

• PLL Concept & Architecture: Define and evaluate RF Digital PLL concepts (e.g., Fractional-N, ADPLL, Sub-sampling PLLs) and architectures tailored for high-frequency wireless applications
• Modeling & Noise Budgets : Develop high-level behavioral models (e.g., MATLAB, Simulink, Verilog-A) to analyze and optimize RF PLL loop dynamics, jitter, spurs, and stringent phase noise performance .
• Circuit Design & Implementation: Translate concepts into high-performance RF and mixed-signal circuits, focusing on critical blocks such as VCOs/DCOs, high-speed frequency dividers (prescalers), Phase-Frequency Detectors, and Charge Pumps, TDC, DTC
• Digitally-Assisted RF Calibration: Architect and verify digital calibration algorithms for PLL (e.g., spur mitigation, and mismatch compensation, TDC, DTC calibrations) to enhance RF performance
• System Partitioning: Partner closely with system architects, digital, and RF frontend teams to optimize mixed-signal and RF system partitioning for transceiver architectures
• Layout & Silicon Characterization: Guide layout engineers to preserve RF signal integrity, minimize parasitic effects, and ensure optimal isolation. Support laboratory validation teams during silicon characterization and debugging of the RF PLL

Your profile Qualifications and skills to help you succeed

• Education: A degree (Master/PhD preferred) in Electrical Engineering, Microelectronics, or a related field with a focus on RF/microwave design
• Experience: 5+ years of proven experience specifically focused on RF Digital PLL concept definition, architectural modeling, and circuit design
• Technical Expertise: Deep understanding of RF design principles, PLL loop theory, microwave engineering, noise analysis (Phase Noise, Jitter), and frequency synthesizer architectures for RF applications. Proficient in advanced CMOS and BiCMOS technologies
• Tools & Skills: Mastery of RF simulation environments (e.g., Cadence Spectre/SpectreRF, GoldenGate) and behavioral modeling tools (e.g., MATLAB, Simulink, Verilog-A)
• Leadership Skills: Proven technical leadership, mentoring skills, and project coordination capabilities
• Languages: Fluent in English (written and spoken). Knowledge of German is considered a plus

We offer competitive salaries and additional benefits based on your performance, experience and qualification.

The employment is in accordance with the collective salary and wage agreement for employees of the electrical and electronics industry, employment group I ( https://www.feei.at/leistungen/informations-service/mindestlohne-und-gehalter ). The monthly salary is paid 14 times p.a. We offer a higher compensation depending on your expertise and skills.

#WeAreIn for driving decarbonization and digitalization. As a global leader in semiconductor solutions in power systems and IoT, Infineon enables game-changing solutions for green and efficient energy, clean and safe mobility, as well as smart and secure IoT. Together, we drive innovation and customer success, while caring for our people and empowering them to reach ambitious goals. Be a part of making life easier, safer and greener. Are you in? We are on a journey to create the best Infineon for everyone. We strive to create the best Infineon for everyone by embracing diversity and inclusion. We welcome applicants for who they are and offer a workplace built on trust, openness, respect and equal opportunity. Our hiring decisions are based on skills and experience. Even if you don’t meet every requirement, we encourage you to apply. Please let your recruiter know if you need any accommodations during the interview process. Learn more about our various contact channels and about Diversity & Inclusion at Infineon.

Martin Gabernig https://www.linkedin.com/in/martin-gabernig-38517a208/