Senior Analog & Mixed-Signal IC Designer

Phizenix Inc.; Santa Clara, Irvine (CA, CA); On-site; USD 180,000 - 240,000; Full time

Job summary

Phizenix Inc. seeks a Senior Analog & Mixed-Signal IC Designer to join a world-class semiconductor team. Deep expertise in high-speed analog circuit design, wireline SerDes front-ends, RFIC front-ends, and precision data converters is required. Silicon delivery in advanced FinFET/SOI processes is expected.

You will design and verify ADCs/DACs/PLLs, develop TIAs, drive pre-silicon sims and post-silicon bring-up, and mentor junior engineers within a cross-functional group.

Qualifications

• PhD in EE with 6+ years in analog/mixed-signal IC design.
• MS in EE with 8+ years in analog/mixed-signal IC design.
• Experience in high-speed analog and RF front-end design.

Responsibilities

• Design and verify high-speed analog/mixed-signal circuits (ADCs, DACs, PLLs, TIAs).
• Architect wireline SerDes front-ends and multi-GHz analog signal chains from concept to tape-out.
• Develop transistor-level schematics and layouts in FinFET (7–16 nm) or SOI.
• Drive pre-silicon simulation and post-silicon bring-up; analyze silicon data and iterate on design.
• Partner with digital, CAD, and systems teams on mixed-signal partitioning and specs.
• Produce detailed design documentation and present progress to stakeholders.
• Mentor junior designers and contribute to best-practice development.

Skills

Analog design

High-speed circuits

TIAs

Clocking systems

LNA/Mixer

ADC/DAC design

Education

PhD in EE

MS in EE

Tools

Cadence Virtuoso

Spectre

Ultrasim

Job description

Senior Analog & Mixed-Signal IC Designer

Role Overview

We are seeking a highly experienced Senior or Staff Analog/Mixed-Signal IC Designer to join a world-class semiconductor team. The ideal candidate brings deep expertise in high-speed analog circuit design—spanning wireline transceivers, RFIC front-ends, and precision data converters—and has a track record of delivering silicon in advanced FinFET or SOI processes. This is a high-impact individual contributor or technical lead role focused on next-generation silicon for data communications, wireless, and compute applications.

Key Responsibilities

• Design and verify high-speed analog and mixed-signal circuits including ADCs, DACs, PLLs, clock distribution, laser/modulator drivers, and transimpedance amplifiers (TIAs).
• Architect and implement wireline SerDes front-ends, optical interconnect ICs, and multi-GHz analog signal chains from concept through tape-out.
• Develop transistor-level schematics and layouts in advanced FinFET (7–16 nm) or SOI technologies; collaborate with layout engineers to meet stringent PPA targets.
• Drive pre-silicon simulation and post-silicon bring-up; analyze measured silicon data and iterate on design to close specification gaps.
• Partner with digital, CAD, and systems teams to define mixed-signal partitioning, interface specs, and shared design methodologies.
• Produce detailed design documentation and present technical progress to cross-functional stakeholders and leadership.
• Mentor junior designers and contribute to best-practice development across the organization.

Required Qualifications

Education & Experience

• Ph.D. in Electrical Engineering (or related) with 6+ years of analog/mixed-signal IC design experience, OR
• MS. in Electrical Engineering (or related) with 8+ years of analog/mixed-signal IC design experience.

Core Technical Skills

• Analog / high-speed circuit design: wideband amplifiers, comparators, bias networks, ESD-tolerant I/Os.
• Laser/modulator drivers and transimpedance amplifiers (TIAs) for optical interconnect applications.
• High-speed ADC and DAC design (pipeline, SAR, flash, current-steering); including low-speed (LS) converters for control and calibration planes.
• Clocking systems: DLLs, resonant/CMOS clock distribution, fractional-N synthesis, jitter budgeting, oscillators (LC/Ring).

Preferred Qualifications

• RFIC design experience: LNA, mixer, PA driver, Broadband amplifiers, RF front-end modules.
• Familiarity with high-speed wireline PHY architectures (56G / 112G PAM-4 SerDes, NRZ).
• Background in optical module ICs (TOSA/ROSA driver ASICs, coherent DSP interfaces).
• Proficiency with Cadence Virtuoso, Spectre / APS / Ultrasim, and industry-standard layout tools.
• Lab characterization skills: oscilloscopes, VNAs, spectrum analyzers, BERT setups.
• Publications or patents in analog/mixed-signal IC design are a plus.

Interested in building your career at Phizenix?