CHEEDELLA SAMBASIVA RAO

acu0l3@r.postjobfree.com

Mobile: +1-617-***-****

Summary:

Medical Device Design/Support Engineer:

9+years of professional experience as an Embedded Hardware Engineer with firmware skills and Medical device sustenance engineering support.

Highly skilled design engineer experienced in researching, developing, designing and single-use disposables, drug delivery systems, implantable devices, medical instruments and surgical devices.

Qualifications include a master’s degree in Digital Systems; comprehensive knowledge of FDA Quality System Regulations, design control SOPs, CQP’s and various servicing processes.

Electronics circuit design with debugging skills

Expertise in preventive maintenance and remote technical support

Knowledge of Embedded hardware life cycle and involvement in more than 5 complete life cycle of projects

Expertise in Risk Management (ISO 14971)

Effectively involved in Design Reviews

Expertise in System Integration and Testing

Expertise in Requirement Analysis, Hardware Architecture, Low Level Design, Higher Level Design, System Integration and final testing

Academic Profile:

M.Tech in Digital Systems and Computer Electronics Engineering (2004-2006) from JNTU, Hyderabad with an aggregate of 75%.

B.Tech in Electronics and Communications Engineering (2000-2004) from Jawaharlal Nehru Technological University with an aggregate of 73.16%.

Diploma in Electronics and Communications Engineering (1996-1999) from S.B.T.E.T. with an aggregate of 70.9%.

SSC from Board of Secondary Education (1995-1996) with an aggregate of 72.33%.

Technical Skills (Hardware):

Hardware design and debugging

Knowledge of analog, digital and mixed signal designs

Knowledge of microcontroller, processor and FPGA based designs

Worked on processors/controllers/FPGA like C8051FO20, C8051F025, ADSP21062

Knowledge of protocols like UART, SPI, I2C

Extensively worked on displays, ADCs, PWM, keypad and other interfaces

Knowledge of schematic tools like ORCAD, CADSTAR

Customer Quality control Tools : BPLM,TcU,TW8,DOORS,Clear Case and Clear Quest

Knowledge of layout tools like CADSTAR, PADS, Allegro PCB editor

Hands on experience IBM Rational Doors

Extensive knowledge in power supply designs

Knowledge of high speed board designs

Extensive hardware debugging experience

Knowledge of RF circuit design and testing

Extensively used test equipment like Multimeter, Signal generator, Spectrum Analyzer, Power meter, DSO, Network analyzer, Radio Communication test set, Data Logger(GraphTEC midi Logger GL820), ICP EXPRESS® unit

Expert in component selection, BOM creation

Knowledge in Zebra design pro software to print the labels on demand

Technical Skills (Firmware):

Knowledge of C/C++/Assembly languages

Knowledge of tools like Silicon IDE, Keil uVISION-3, VisualDSP4.5++, National instruments Multisim, Doors, Clear Case, Clear Quest and Minitab

Experience in development of firmware for various 8-bit microcontrollers like AT89C51, C8051F020, C8051F025 and DSP Processor ADSP-21062.

Experience in simulators like MATLAB6.5/7.0

Project Details:

Project # 1 : HomeChoice Service Support

Client name&Loc : Baxter Healthcare Corporation, Round Lake-IL

Description : The cycler performs Automated Peritoneal Dialysis (APD) by heating a dialysis solution, pumping the solution to and from the patient, and accounting for volumes of the solution according to a physician prescribed therapy. It requires compatible dialysate solution bags, a disposable cassette and tubing sets to perform the dialysis therapy.

Once the system is turned on and all pre-therapy parameters have been entered, the system prompts the user to load a new disposable set. With the new disposable set loaded, the system performs integrity checks, and then begins the APD therapy according to the prescribed set of therapy parameters. In general, APD therapy consists of repeated Fill, Dwell and Drain sequences over the course of a day or night.

Responsibilities:

HomeChoice Service Procedure revision

Revise the SPIHOMECHOICE (BOM Preparation)

Design, document package configurations and develop corrections including device label updates ( label design, development and validation) and support to Supplemental and Non-supplemental Labels based on regions requirement

Issue the Technical service bulletins/interim based on Change Controls (ex: Chore boy, RSI Cable, Piston Foam, Japan Data plates)

Supporting HomeChoice Service related change packages

Support to Value improvement service projects

Service instruction for print on demand process and finalize hardware & software configurations and validate

Requirement Analysis and Implementation

Hardware design

Power Supplies Design

Components Selection

Schematic preparation

Trouble Shooting

Project # 2 : ICP Microsensor verification activities

Client name&Loc : Johnson and Johnson, BOSTON-MA

Description : Intracranial pressure Microsensor placed in a head, this sensor is connected to ICP monitor. This monitor senses the inside the skull with support of ICP micro sensor and sends measurements to a recording device.

To insert an intraventricular catheter, a hole is drilled through the skull. The catheter is inserted through the brain into the lateral ventricle. This area of the brain contains liquid (cerebrospinal fluid or CSF) that protects the brain and spinal cord.

The intracranial pressure (ICP) can at the same time as monitoring by draining fluid out through the catheter.

Responsibilities:

Preparation of Protocols and Test methods

Verification activities for test methods

Involvement in system integration

Preparation of user document

Trouble Shooting

Project # 3 : CODMAN CERTAS Programmable Valve

Client name&Loc : Johnson and Johnson, BOSTON-MA

Description : CODMAN CERTAS Programmable Valve combines simplicity with control.

With hydrocephalus, optimal fluid management requires a versatile device that can easily accommodate different rates of drainage. Only CODMAN CERTAS Programmable Valves provide all these features combined:

• Easy programming and setting confirmation

• A range of 8 settings

• Resistant to MRI influence1 up to 3 Tesla

• Programmer portability

•Optional BACTISEAL® Antimicrobial Catheter integration

A valve like no other.

Responsibilities:

Verification activities for test methods

Involvement in system integration

Preparation of user document.

Trouble Shooting.

Project # 4 : Risk Management support for Peritoneal Dialysis system disposables

Client name&Loc : Baxter Healthcare Corporation, Round Lake-IL

Software/Tools : IBM Rational Doors, TCU, BPLM

Description : The Peritoneal Dialysis (PD) System is intended for automatic control of dialysis fluid solution exchanges in the treatment of renal failure patients undergoing peritoneal dialysis. The PD System consists of a disposable set that provides a sterile liquid circuit for directing dialysis solution into and out of the patient through an implanted catheter. The disposable set has a cassette to provide fluid pumping and routing, tubing and connectors that connect to the dialysate solution supply bags, an outlet drain line, a heater bag, and tubing to the patient (allowing connection to the patient's peritoneal catheter).

Responsibilities:

DFMEA

System FMEA

UMFMEA

RACT

Trace matrix Report

Risk Management Plan(PMP)

Risk Management Report (RMR)

DOORS Module (Linking provided between SyRS, DFMEA, PFMEA, System FMEA,RACT and Hazard Situation(HS)

Project # 5 : Sustenance Activities & Component Engineering for IVT

Client name&Loc : Baxter Healthcare Corporation, Round Lake-IL

Software/Tools : IBM Rational Doors, TCU, BPLM

Description : Worked in Nutrition therapy device –IVT Compounders. Compounder is a medical device used solely for the purpose of preparing total parenteral nutrition (TPN) solutions. It features gravimetric weighting of compounded TPN solutions to monitor the actual volume of TPN solutions compounded. It is designed to operate in a laminar flow hood or equivalent environment and to perform fluid transfers aseptically.

Responsibilities:

DFMEA

WCCA analysis.

Derated Stress analysis

Provided extended support to the customer by performing product support activities like Non conformity (NC) and change packages (CP).

Project # 6: Sustenance Activities & Component Engineering for Infusion Pump

Client name & Loc : Baxter Healthcare Corporation, Round Lake-IL

Software/Tools : IBM Rational Doors, TCU, BPLM

Description : Worked for Volumetric infusion pump COLLEAGUE, where I was involved in the product support activities. Infusion pump is basically a medical device that infuses fluids, medication or nutrients into a patient circulatory system.

Infusion pump is a drug delivery system that delivers drug into the patient body. It consists of a PIC controller, a stepper motor, LCD, key board and some sensors. Re-design of its boards and checking for reliability analysis for stress, de-rating, WCCA, DFMEA and later performing schematic design, board bring up and testing.

Responsibilities:

DFMEA

WCCA analysis.

Derated Stress analysis

Provided extended support to the customer by performing product support activities like Non conformity (NC) and change packages (CP).

Project # 7 : AKASH Weapon Systems

Client name & Loc : BDL, Hyderabad

Role : Testing and Development

Software/Tools : Visual DSP++4.5, Tiger SHARC Processor, Xilinx ISE 9.2 i and Analog device filter design wizard

Description : The Akash RPF (Radio Proximity Fuse) is mounted on Akash missile, which is a guided missile weapon system. The fuse detects the presence of enemy target with in a distance of 2mts to 45 mts and initiates signal to activate the warhead. The unit works with 28 V DC supply. Internal DC-DC Converter generates the voltages +15v, -15v, +5v required for operation of modules/PCBS in the unit.

The unit contains the modules like Ku Band RF Transmitter, Ku Band Receiver, Digital Signal Processing Unit, DC-DC Converter, External LNA, and RF Cables.

Responsibilities:

Responsible for Testing both in system level and sub module level.

Involvement in system integration

Preparation of user document.

Trouble Shooting.

Transfer of technology from R & D to production.

Coordinating all Environmental, EMI/EMC tests (Acceptance)

Project # 8 : Multiple Radio Pre Initiators (MRPI)

Client name & Loc : Ministry of Defense (ARMY), J&K

Role : Developer

Software/Tools : Embedded C / Silicon IDE, ORCAD

MCU : C8051F020

Description : MRPI is specially designed equipment for pre-initiating the Remote Controlled Improvised Explosive Devices (RCIED) by transmitting the Dual Tone Multiple Frequency (DTMF) codes. The entire equipment operates in Citizen Band (136-172 MHz). There will be two sections basically, power amplifier section and exciter section. Exciter section consists of a micro controller based control card with keypad and display interface along with inbuilt BITE module. The BITE module senses the forward power from the output of the power amplifier and if it is in comfortable range, the control card shall transmit the DTMF codes. The control card interfaces with four Multichannel DDS chips, which will generate the required citizen band frequencies.

The controller will interface with Four multichannel DDS Chips (AD9959), DTMF Transceiver chip (MT8880C), Analog voltage monitoring of Forward power, Keypad and LCD.

Responsibilities:

Involved in coding for various modules, keypad, LCD 4x20 displays and A/D Converters

Involved in System/Hardware designing and coding for application

Involved in system functionality testing

Involved in Integration testing

Involved in Code Review

Project # 9 : DDS Based Exciter of Cell Jammer

Client name&Loc : BHARATH ELECTRONICS LIMITED, Hyd

Role : Developer

Software/Tools : Embedded C / Silicon IDE

MCU : C8051F020

Description : DDS based Exciter ASL-DDSEX-CJ 20X4 Delivers 20-watt average power in each port over frequency range of 860 to 960 MHz with a power gain 43db(approx).The primary voltage for this model is +26V DC (nominal). High temperature protection,VSWR protection,BITE test,RS-232 and Automatic Level Control(ALC) are the standard features of this model Front panel display indicates the statusof BITE test,output power Levels and Fault alarms . All the functions are performed by using Front panel keypad and displayed by LCD.

Responsibilities:

Involved in coding for various modules, keypad, LCD and 4x20 displays

Involved in system functionality testing

Involved in designing and coding

Involved in Unit testing

Project # 10 : IF DOWNCONVER AND BURST DEMODULATOR

Client name & Loc : Indian Navy, New Delhi

Team Size : 4

Role : Developer

Software/Tools : Visual DSP++4.5, SHARC Processor

MCU : ADSP-21062

Description : The Hub station receives the C - band signal from the terminal through GSAT satellite and converts to an IF of 73.920MHz 50 kHz. The IF Down converter and Burst demodulator is interfaced signal to 9 kHz 5 kHz. This Low Pass Filter will reject noise signals above the14kHz between RF down Converter and Synchronous to Asynchronous Converter. The IF Down-Converter down converts input signal in two stages. These two stages will be used to down convert standard 73.920MHz. The amplified signal (9 kHz 5 kHz) is fed to burst demodulator for further processing.

Responsibilities:

Involved in coding for various modules, keypad, LCD and 4x20 displays.

Involved in system functionality testing.

Involved in designing and coding.

Involved in Unit testing.

Project # 11 : S-Band Receiver &Burst Demodulator

Client name & Loc : Indian Navy, New Delhi

Role : Team member

Programming Tools : Visual DSP++4.5, SHARC Processor,

Embedded C/ Keil

Tools : ORCAD, Oscilloscope, Function Generator,

Spectrum Analyzer

Description : The aim of this project is to communicate between ships or Hub to ship.The satellite based MSS S-Band Receiver unit receives the messages from Hub through GSAT-2 MSS transponder to realize Hub to Ship data communication. The Receiver receives the messages from various Hub stations with a unique code pattern & demodulates and decodes and finally displays in the system through serial port configuration.

Responsibilities:

Involved in sub system designing.

Prepared the schematic & checking the net list for Demodulator and Decoder card.

Hardware testing of the sub modules& Integration level.

Project # 12 : MATLAB SIMULATION FOR BPSK MODULATION, CARRIER

RECOVERY AND DEMODULATION.

Client : In house development

Role : Team member

Programming Tools : MATLAB 7.0

Description : This project deals with the design of a carrier recovery. Recovering the carrier in demodulator is key for recovering the message signal. We implement one of the two common methods for BPSK carrier recovery .1. Squaring the BPSK signal then dividing by two and 2. The costas loop. Once the carrier frequency estimation is done, we can generate a local oscillator. When the incoming signal and local oscillator signals are passed through a mixer and further processed we can get the message signal which is a base band signal.

Responsibilities:

Involved in Designing, Coding and Testing

Personnel Profile:

Name : Sambasiva Rao. CH

Date of Birth : 12.06.1981

Marital status : Married

Passport Number : K0359825

Visa type : H1B

Validity : Till MAR-2018

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