CASE STUDY

Designed RF transceiver Circuit

for a leading mobile and wireless major

Client

Our client is a leader in communication/ signal-processing/ sensor tech.

v

Expectation

Our client had IP’s designed to meet the needs of different customers – leaders in communication/ signal-processing/ sensor tech. They wanted our help in designing their RF transceiver Circuits for mobile and wireless handheld devices.

Team

Team of 17 resources were dedicated to this project: 2 architects, 6 circuit designers, 6 layout persons and 3 MSV resources.

Duration

The team took 24 months to execute this project.

ROLES & RESPONSIBILITIES

Our team developed high performance RFIC blocks for mm-wave transceivers using Cadence tools such as LNA, Mixer, RF-PLL, Filter, etc. We were able to:

  • Understand RF/mm-wave transceiver specifications
    and translate them into circuit-level specifications
  • Design and verify calibration algorithms
    such as DC cancelation, VCO setting, LO rejection, IQ gain and phase mismatch
  • Execute physical layout of all circuits
    and have a thorough understanding of all RF-layout requirements
  • Participate in IC assembly,
    SOC verification and lab evaluation
  • Prepare and maintain project doc
    including general spec & circuit description

PROJECT SPECIFICATIONS

  • Tools
    Cadence virtuoso schematic editor, ADE-L/XL and Spectre/SpectreRF, ADS and HFSS.
  • Engagement Model
    We took complete ownership of the block from specs to GDS delivery with all functional and performance simulation qualifying the spec.
  • Application
    Targeting the analog/RF front end for next generation wireless communication system.
  • Design Spec
    Speed/Frequency like 800M-900MHz, 2.4/5GHz and multi-channel wireless system, in 90nm/65nm RF process technology.
  • High-frequency front end
    LNA, PA, modulator, mixer, LC-VCO, frequency divider/multiplier, switch, filter and phase shifter.

DESIGN CHALLENGES

  • Low jitter and phase noise LC-PLL (Local Oscillator)
    driving clock to RF mixer and externally divided clock to I-Q mixer.
  • Design of the power pad
    had the same significant effects on the RF PA operation.
  • General PA design challenges
    such as low breakdown voltage, limited gain, parasitic cap and resistances, less power efficiency were also experienced
  • LNA design was challenged by factors
    such as impedance matching, power constrained noise matching, maintaining moderate to high gain over fairly large bandwidth, low power consumption, good linearity etc

START A CONVERSATION

We'll get back to you as soon as we can.