Product Documentation
Spectre Circuit Simulator and Accelerated Parallel Simulator RF Analysis in ADE Explorer Workshop
Product Version 23.1, September 2023

Contents

Introduction

Using SpectreRF from the SPECTRE Hierarchy

Accessing the Most Current SpectreRF Documentation

Creating a Local Editable Copy of the ExampleLibRF Library

Downloading and Using GPDK180

Starting Virtuoso

Simulating Low Noise Amplifiers

The lnaSimple Low Noise Amplifier Circuit

Setting Up to Simulate the lnaSimple Low Noise Amplifier

Opening the lnaSimple Circuit in the Schematic Window
Choosing Simulator Options
SP Analysis and Small Signal Gain
Stability
Linear 2-port noise analysis (NF, NFmin) and Noise circles
Summary
Third-Order Intercept measurement with HB (2 tone HB)
Choosing Simulator Options
Measuring IP3 with Rapid IP3
Summary

Simulating Oscillators

Simulation Methods

Phases of Autonomous PSS/HB Analysis

Phase Noise and Oscillators

Starting and Stabilizing Feedback Oscillators

The Oscillator Circuit

Setting Up to Simulate the Oscillator Circuit

Setting up ADE Explorer for Oscillator Simulation

Calculating the Steady-State Solution using PSS Harmonic Balance

Setting up the PSS Analysis
Running the PSS analysis

Oscillator Loop Gain Measurement

Setting up the stb Analysis
Setting up the HB Analysis
Setting up the HBSTB Analysis
Running the HB, stb and HBSTB analysis
Plotting the results

Phase Noise Measurement and Noise Summary Table

Setting up the HB and HBnoise Analysis

Oscillator Swept Tuning Range and Phase Noise Measurement

Setting up the HB and HBnoise Analysis

Ring Oscillator Measurements

Starting and Stabilization of Ring Oscillators
The Oscillator Circuit

Simulating the Oscillator Circuit

Calculating the Steady-State Solution using PSS Shooting Analysis

Setting up the PSS Analysis
Running the PSS analysis

FM Jitter Measurement using PSS Shooting and Pnoise Jitter Analyses

Determining FM Jitter
Setting up the PSS Analysis
Running the PSS and Pnoise analysis

Calculating the Swept Tuning Range and Phase Noise for the Ring Oscillator

Setting up the PSS Analysis
Running the PSS and Pnoise analysis
Summary

Simulating Mixers

The db_mixer and db_mixer_xmit Mixer Circuits

Setting Up to Simulate the db_mixer Mixer

Opening the db_mixer Mixer Circuit in the Schematic Window
Choosing Simulator Options
Setting Up the Simulation - Setting Design Variables
Setting Up Model Libraries
Setting Design Variables
Setting up hbnoise to measure noise figure
Third-Order Intercept measurement with HB
Mixer Distortion Measurement

Setting Up to Simulate the db_mixer_xmit Mixer

Three Tone Spectral Content and Image Rejection
Three Tone IP3
Signal-to-Noise Ratio
Three Tone HB Analysis Setup
Summary

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