Lab9: ADS Ptolemy-Circuit Co-Simulations Day 3 Lab9: ADS Ptolemy-Circuit Co-Simulations

Theme Day 1- Background Preparation Maxwell Equations-Physical Interpretation & Application Interconnects- Design, Mismatch, & Insertion Losses GaAs Process- Pseudomorphic HEMTs, Inductors & MIM Capacitors Process Introduction Day 2- Power Amplifier, MMIC Design Example DC Characterization- Biasing Decoupling, Biasing Techniques, Thermal Stability Small Signal Characterization- Matching & Stability Large Signal Characterization- Single Tone Analysis, Matching across Power Load Pull Day 3- Design Refining, Layout & Design Post Processing Modulated Signal- QAM16 Input, Ptolemy & Circuit Co-simulations Linearity- Two Tone Analysis, IP3, ACPR, & EVM On-chip Power Combiners & Dividers Layout & Tiling

QAM16 Modulation Each State, designated unique phase and amplitude, represents 4 bit symbol Acceptable State with Amplitude and Phase Error I Q I Q Bin Sampling I Signal Filtered I Signal Ideal QAM 16 Constellation

PA Linearity & Signal Integrity Pout (dBm) Gain (dB) Phase t I (t) Q (t) Modulates Sine Carrier Modulates Cosine Carrier QAM16 Constellation Filtered I & Q Signals Sine & Cosine Components of RF Carrier are modulated by I and Q Signals. Output of IQ Modulator is input to PA PA Transfer Characteristics Demodulated PA Output

QAM16 Source TkPlot DSP Filters TkPlot IQ Modulator Random Data Bits I & Q bit stream

PA Circuit for Ptolemy-Circuit Co-Simulations Symbol for PA Sub-Circuit PA Sub-Circuit

Envelope Simulation Setup

Ptolemy Bench for Ptolemy-Circuit Co-Simulation

PA Performance Output Constellation from Compressed PA Skewed Constellation Output Constellation from Uncompressed PA

Lab9: ADS Ptolemy-Circuit Co-Simulations Start Lab Exercise!