Signal & Power Integrity · Advanced Packaging · RF & Analog IC

Kruthik Reddy
Purumandla

Electronics enthusiast with a passion for chips, semiconductor packaging, and debugging the trickiest signal integrity problems.

Expertise

Deep-domain work spanning EM simulation, packaging co-design, and full-custom analog with hands-on cleanroom fabrication experience bridging design to silicon.

01 — SI/PI

Signal & Power Integrity

Extracting S-parameters, modeling interconnect parasitics, and characterizing PDN impedance for high-speed chiplet-based systems. Experienced with ANSYS HFSS for full-wave EM simulation of package and PCB structures including via transitions, trace routing, and decoupling strategies.

ANSYS HFSSS-Parameter ExtractionPDN AnalysisSI/PI Co-Simulation
02 — Packaging

Advanced Semiconductor Packaging

Building 2D/2.5D chiplet package models with interposer routing, micro-bump arrays, and RDL stackups. Analyzing warpage, CTE-driven strain, and thermo-mechanical reliability to inform SI/PI-aware co-design decisions across die-package-board boundaries.

2.5D InterposerChiplet Co-DesignWarpage & CTE AnalysisANSYS Mechanical
03 — RF & Analog

RF & Analog IC Design

Full design flow from schematic through simulation — folded-cascode amplifiers and multi-class RF power amplifiers in Cadence Virtuoso and Keysight ADS with DC, AC, and transient analysis across load and bias conditions.

Keysight ADSCadence VirtuosoRF Power AmplifiersCMOS Amplifiers

Education

Graduate training at ASU's semiconductor packaging and analog IC programs, built on a strong EE foundation from Mahindra University.

Expected May 2026

M.S. Electrical Engineering, GPA: 3.7

Arizona State University · Tempe, AZ
Key Coursework
Co-Design for Advanced Semiconductor Packaging · Advanced Analog Integrated Circuits · Analog-to-Digital Converters · RF Transmitters · Microwave Circuit Design · Computer Architecture · CMOS & MEMS · Semiconductor Fabrication & Cleanroom Practices
Graduated August 2024

B.Tech. Electrical & Electronics Engineering

Mahindra University · Hyderabad, India
Key Coursework
Analog IC Design · VLSI Design · Semiconductor Devices · Digital Electronics

Projects

Simulation-driven projects spanning package-level SI/PI, transmission line characterization, RF power divider co-simulation, and full-custom analog design.

SI/PI · Packaging

2D/2.5D Chiplet Package Modeling

Package-level modeling study using ANSYS Mechanical to evaluate thermo-mechanical behavior and its impact on interconnect parasitics and signal/power integrity in chiplet architectures.

  • Built 2D and 2.5D chiplet package models including dies, interposer, and micro-bumps to study package-level behavior
  • Examined warpage and thermal effects caused by material mismatch to understand their impact on interconnect parasitics
  • Evaluated how package deformation influences signal and power integrity behavior in high-density interconnects
ANSYS Mechanical
SI · EM Simulation

Microstrip Transmission Line EM Modeling on AlN Substrate

Full-wave electromagnetic simulation of a microstrip transmission line on aluminum nitride substrate in ANSYS HFSS, characterizing high-frequency interconnect behavior through S-parameter extraction across a wideband frequency sweep.

  • Constructed microstrip geometry on AlN substrate in ANSYS HFSS, defining trace dimensions and 50 ohm wave ports for high-frequency simulation
  • Extracted S-parameters (S11, S21) across a 2.5 to 12.5 GHz frequency sweep, observing an S11 minimum of -8.5 dB near 7.5 GHz
  • Evaluated reflection and transmission characteristics to validate impedance control and frequency-dependent loss behavior
ANSYS HFSS
RF · EM Co-Simulation

Wilkinson Power Divider Design

Microstrip Wilkinson power divider designed for the 5.65 to 5.925 GHz band on Rogers RO4003C substrate, validated through S-parameter analysis and Momentum EM co-simulation for return loss, power split balance, and port isolation.

  • Designed a 5.65 to 5.925 GHz Wilkinson power divider using microstrip transmission lines on Rogers RO4003C substrate
  • Performed S-parameter analysis and Momentum EM co-simulation to evaluate return loss, power split balance, and port isolation
  • Validated equal power division and inter-port isolation across the target frequency band using circuit and EM simulation agreement
Keysight ADSMomentum EM
Analog IC Design

High-Performance CMOS Amplifier Design

Folded-cascode CMOS amplifier design in Cadence Virtuoso with transistor sizing, beta-multiplier biasing, and comprehensive DC/AC/transient simulation across load and bias conditions.

  • Designed a folded-cascode CMOS amplifier with transistor sizing and beta-multiplier biasing in Cadence Virtuoso
  • Evaluated gain, bandwidth, phase margin, and stability using DC, AC, and transient simulations across load and bias conditions
  • Validated performance achieving 666 uA bias current, 2 mW power consumption, and 1.06 V output swing from a 3 V supply
Cadence VirtuosoADE-L
RF Design

Multi-Class RF Power Amplifier Design

Comparative RF amplifier study across Class-A, Class-B, Class-C, and Doherty topologies evaluating efficiency and linearity through input power sweeps, output back-off analysis, and modulated signal characterization.

  • Simulated Class-A, Class-B, Class-C, and Doherty RF power amplifiers in Keysight ADS to evaluate efficiency and linearity
  • Performed input power sweeps and output back-off (OBO) analysis to study efficiency under CW and modulated signal conditions
  • Used MATLAB to analyze signal envelope and evaluate efficiency trends under modulated signals
Keysight ADSMATLAB
Computational Modeling

Cleanroom Airflow & Particle-Transport Simulation

Python-based simulation of 0.5 um particle distribution in a 10x10x1 ft3 cleanroom slice, modeling zone-based recirculation, HEPA/ULPA filtration, and equipment blockages to determine ISO and Fed. Std. 209E cleanliness classifications.

  • Built grid-based airflow model with columnar, diverging, and merging particle transport logic across recirculation zones
  • Validated model against provided test case, matching 2.1848 particles/min benchmark for filter penetration
  • Simulated four scenarios including improved filtration (ISO Class 4), air handler failure (Class 1000), and a realistic case using published industry parameters
  • Determined ISO 14644 and Fed. Std. 209E cleanliness classifications from per-cell particle count outputs
PythonNumPyMatplotlib

Experience

Teaching, hardware development, and fabrication experience connecting design simulation to physical realization.

Jan 2025 -
Present

Graduate Service Assistant

Arizona State University · Tempe, AZ

Supporting semiconductor fabrication cleanroom instruction and systems dynamics laboratory coursework.

  • Guided students on cleanroom design and layout constraints in the Semiconductor Fabrication Cleanroom course
  • Assisted with MATLAB-Arduino labs for Systems Dynamics and Controls course, supporting experiments and grading
MATLABArduino
Nov 2023 -
Apr 2024

Electronics Engineer Intern

Wisda Energy · Hyderabad, India

Developed analog front-end circuits for solar energy sensing with emphasis on noise reduction and signal conditioning.

  • Designed a low-noise analog front-end for solar sensing signals, reducing noise susceptibility by 22% during system validation
  • Validated analog signal paths using LTSpice to ensure stable gain behavior prior to PCB implementation
  • Integrated sensor conditioning and ADC scaling into the control module, improving measurement reliability
LTSpice
Jun 2023 -
Sep 2023

Electronics Design Engineer Intern

iTIC Incubator, IIT Hyderabad · Hyderabad, India

Developed IoT sensor modules with analog signal conditioning for industrial monitoring applications.

  • Conditioned piezoelectric sensor signals using analog amplification and filtering to reduce noise before ADC digitization
  • Modeled the analog signal chain in LTSpice to validate gain and noise performance prior to hardware testing
  • Debugged signal noise using an oscilloscope and interfaced digitized sensor data with an Arduino-based IoT module
LTSpiceOscilloscopeArduino

Skills

Tools and domain knowledge spanning EM simulation, package design, analog IC, and lab measurement organized by functional area.

Signal & Power Integrity

Signal IntegrityPower IntegrityPDN AnalysisInterconnect ParasiticsHigh-Speed Interconnects

Semiconductor Packaging

2D / 2.5D Chiplet PackagingThermo-Mechanical ReliabilityThermal Analysis

EDA & Simulation Tools

ANSYS HFSSANSYS SIwaveANSYS Q2D ExtractorANSYS MechanicalKeysight ADSCadence VirtuosoLTSpice

Measurement & Validation

VNATDROscilloscopeSpectrum AnalyzerPCB DebuggingHardware Signal Validation

Programming & Analysis

PythonMATLABCC++NumPyMatplotlibMS Excel

Open to Opportunities

Open to opportunities in Signal/Power Integrity engineering, advanced semiconductor packaging, and analog IC design.