Cadence Custom IC Design Blogs

Unifying Electronic and Photonic Circuit Simulation

Corporate — Tue, 17 Mar 2026 17:00:00 GMT

The Need For Photonics

The proliferation of artificial intelligence, the rollout of faster mobile networks, and the corresponding demand for vast data storage all require unprecedented processing power and data transfer capacity. To meet these bandwidth requirements, designers are pushing hardware to its absolute limits. However, electrical-only solutions are hitting a physical wall. Power consumption and heat generation pose critical constraints on system performance and operating costs, and the industry needs innovative ways to move data faster without exceeding power budgets.

Photonic integrated circuits (PICs) provide a path forward. By using photons with electrons, PICs offer high-bandwidth, high-energy efficiency, and low cost by leveraging CMOS-compatible manufacturing processes. Designing these complex systems, however, requires advanced tools that can handle both the electrical integrated circuits (EICs) and PICs without creating bottlenecks in your workflow.

Merging Two Worlds into One Engine

Spectre Photonics extends the trusted Spectre Simulation platform into photonic circuit simulation. It directly addresses the increasing complexity of electronic-photonic co-design by merging electrical and photonic simulation into a single, cohesive engine.

Key Features of Spectre Photonics

By integrating photonic capabilities into the simulator, Spectre Photonics delivers a consistent simulation experience. Key advantages include:

Versatile and Combined Circuit Simulation: You can simulate EICs or PICs alone or the combined EIC and PIC simultaneously. This single-engine approach ensures accurate results and reveals how different components interact across domains in real-world conditions.
Proven Scalability and Performance: Because it builds on the existing Spectre Simulation platform, Spectre Photonics leverages the exact same performance, speed, and massive scalability that engineers already trust for complex electrical designs.
Seamless Virtuoso Studio Integration: Spectre Photonics integrates tightly with the Virtuoso Studio environment. You can design, simulate, and analyze your photonic circuits using the exact same interfaces and workflows you use for standard IC design, drastically reducing the learning curve.
Open Modeling Framework: The solution is based on open modeling frameworks such as Verilog-A and S-parameters. This gives you the flexibility to create custom models, adapt to specific foundry processes, and tailor the simulation to your exact project requirements.

Advancing the Cadence Photonics Solution

Spectre Photonics is a vital part of the full Cadence photonics solution. It empowers engineering teams to bring high-bandwidth, energy-efficient optical interconnects to market faster.

Ready to streamline your electronic-photonic IC design? Explore the full capabilities of the Spectre Photonics Option and discover how unified simulation can accelerate your next major project.

Virtuoso Studio IC25.1 ISR4 Now Available

KomalJohar — Wed, 25 Feb 2026 10:50:00 GMT

Virtuoso Studio IC25.1 ISR4 production release is now available for download.(read more)

Virtuoso Studio: Layout Editor Productivity Enhancements Blog Series

Rohini Garg — Thu, 19 Feb 2026 05:31:00 GMT

In the complex world of custom IC layout, every click and keystroke counts towards productivity. Recognizing this, the Virtuoso®︎ Studio IC25.1 release introduces a suite of powerful UI usability enhancements tailored specifically for layout editors.(read more)

Virtuoso Studio: Excellent XL - Next-Gen Layouts with Virtuoso Layout XL

GirishV — Tue, 17 Feb 2026 04:45:00 GMT

The ‘Excellent XL’ blog series explores what makes Layout Suite XL so powerful for connectivity-driven layouts, how you can ensure Layout XL compliance, and the automation features that Virtuoso Studio offers to streamline your design flow.(read more)

A Journey Through 2025: Learning, Innovation, and Momentum

ulrike — Wed, 04 Feb 2026 05:26:00 GMT

Cadence Training 2025 Year in Review: 30 New Blogs, Accelerated Learning Expansion, New Digital Badges, and Top-Performing Virtuoso Content (read more)

Virtuoso Studio IC23.1 ISR17 Now Available

KomalJohar — Wed, 28 Jan 2026 04:21:00 GMT

Virtuoso Studio IC23.1 ISR17 production release is now available for download.(read more)

Virtuoso Studio: Plotting Templates-Compare, Focus and Analyze Like Never Before

Udit Rajput — Wed, 21 Jan 2026 03:30:00 GMT

If you’ve ever wished waveform analysis could be faster, cleaner, and less repetitive, the latest IC25.1 ISR3 update delivers exactly that. Plotting Templates now support Append mode, letting you compare results from multiple runs in a single graph—no more juggling windows or reapplying settings. And with the new corner filtering options, you can instantly narrow down hundreds of corners to just the ones that matter, then plot results only those with a single click. Read through this blog to know more about the enhancements made to Plotting Templates in Virtuoso Studio IC25.1 ISR3.(read more)

Virtuoso Studio IC25.1 ISR3 Now Available

KomalJohar — Wed, 17 Dec 2025 18:30:00 GMT

Virtuoso Studio IC25.1 ISR3 production release is now available for download.(read more)

Virtuoso Studio: Streamlining the Design Review Process

Parula — Wed, 17 Dec 2025 06:11:00 GMT

This blog covers how to overcome challenges that can arise in the Design review process due to accessibility, maintenance, and relevance by using the Virtuoso-based Design Review feature.(read more)

Virtuoso Studio: Navigating Smarter - Introducing the Virtuoso Dashboard

Vipin Singh — Fri, 12 Dec 2025 12:45:00 GMT

The Virtuoso Dashboard brings a unified, streamlined way to manage every window and session in Virtuoso Studio. With dynamic thumbnails, quick navigation, session monitoring, and an easy-access interface on every window, it simplifies multitasking and keeps your workspace organized. Discover how this final update in the Virtuoso Studio Refresh series helps you stay focused, efficient, and in control of your design environment.(read more)

Virtuoso Studio: Stay Notified, Stay Productive-Introducing Notification Display

Vipin Singh — Thu, 11 Dec 2025 08:24:00 GMT

The latest update to Virtuoso Studio introduces a smarter, more seamless way to stay aware of important events while you design. The new Notification Display brings messages directly onto the canvas, helping you stay focused without switching back to the CIW or breaking your flow. With clear visual cues, configurable behavior, and an intuitive read/unread model, this enhancement ensures you never miss critical information — while still keeping the workspace clean and distraction-free. Curious how the new notification system works and how it fits into your daily workflow? Dive into the full blog to see how this feature keeps you informed, in control, and fully in your design zone.(read more)

Demystifying Standard Cell Characterization with Cadence Liberate

Rajshekharayya — Wed, 10 Dec 2025 08:57:00 GMT

In the constantly evolving field of semiconductor design, accuracy and performance are essential. A key step in creating high-quality chip designs is the characterization process, which determines how circuits perform under different specified conditions, including Process, Voltage, and Temperature (PVT) variations. This is where the Characterization tool Cadence Liberate acts as a transformative solution.

Why Standard Cell Characterization Matters

Imagine you are designing a high-speed processor for a next-generation smartphone. Your design incorporates millions of standard cells, including NAND gates, NOR gates, and flip-flops. Each of these cells must be accurately characterized to ensure that the chip meets its timing, power, and noise specifications.

Let’s say you're using a BUFFER cell in a critical path; inaccurate modeling of its delay or power consumption could result in timing violations, increased power usage, or even chip failure. This is where Cadence Liberate proves to be essential. It allows you to simulate and model the behavior of these cells under various process, voltage, and temperature (PVT) conditions, as well as various slew rates and load conditions. This ensures that your design remains robust and reliable.

Why Cadence Liberate Stands Out

Liberate automates the creation of Liberty (.lib) files, which are essential for synthesis, simulation, and sign-off. Its unique Inside View technology extracts deep insights from SPICE netlists and process models, enabling:

Pre-analysis at transistor level: Enhances performance by eliminating false and redundant vector sequences and automatically setting initial conditions.
Static and dynamic techniques: Determine setup information like input/output and timing bounds.
Embedded SKI Spectre engine: Eliminates the need for repeatedly invoking an external SPICE simulator. This is particularly impactful when running hundreds of thousands of simulations, where the cumulative overhead can become substantial. The outcome is a 2–3× speed up in simulation throughput.
Timing accuracy: Tightens bounds for calculating timing constraints (e.g., setup and hold times) and enables efficient characterization for high-quality libraries.

Cadence Liberate supports multiple models, including NLDM, CCS, ECSM, CCSN, and LVF. It also offers manual flexibility to define arcs, loads, and waveforms for precise tuning.

Learn How to Do This Yourself

Our Characterizing Standard Cells Using Liberate Course takes you from concept to implementation, covering:

Timing characterization concepts and modeling
Power and noise characterization concepts and modeling
Liberty file structure
Setting up characterization using the Liberate tool
Characterization and modeling of standard cells using Liberate
Debug methods for timing and power characterization

The course not only teaches theory but is also deeply integrated with Cadence’s product ecosystem. Tools like Spectre for transistor-level simulation and Liberate for characterization are central to the workflow. These tools support a wide range of modeling formats, including:

NLDM: Conventional delay modeling using 2D lookup tables
CCS/ECSM: Advanced waveform-based timing models
CCSN/ECSMN: Noise modeling for signal integrity
CCSP/ECSMP: Power modeling using current waveforms

Advanced formats are essential for modern designs, especially at 7nm and below, where traditional models fall short in capturing nonlinearities and parasitic effects.

Ready to Master Standard Cell Characterization?

For lab instructions and a downloadable design, enroll in the online training courses of your interest, Characterizing Standard Cells Using Liberate

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Online Course

Characterizing Standard Cells Using Liberate

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On the Cadence Support portal, select Register Now and provide the requested information on the Registration page.
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Green, Red, and Blue Lights in the Layout Design — What Do They Indicate?

VEENA G P — Wed, 26 Nov 2025 14:30:00 GMT

As you know, even after generating the layout from the source, there can still be connectivity (binding) mismatches between the schematic and layout. Traditionally, fixing or debugging these issues requires manual navigation through multiple menus to...(read more)

Virtuoso Studio: Viewing Designs Clearly - Understanding LPP Transparency

Vipin Singh — Tue, 18 Nov 2025 06:49:00 GMT

Virtuoso Studio introduces LPP Transparency—a feature that gives you clearer visibility across multi-layer designs by reducing clutter on the canvas. It helps important details stand out while keeping your workflow uninterrupted. Want to see how it streamlines dense layouts? Explore the blog for a quick overview. (read more)

Small-Signal Analyses Using HB and Shooting Newton Methods in SpectreRF Option

Pratul Nijhawan — Mon, 10 Nov 2025 05:12:00 GMT

In the world of RF and analog design, understanding how circuits behave under periodic steady-state conditions is essential—especially when dealing with mixers, oscillators, LNAs, and power amplifiers. These circuits often operate in nonlinear regimes and involve frequency translation, making traditional transient analysis inefficient or even impractical.

The SpectreRF option, Cadence’s industry-standard RF simulation engine, offers two powerful simulation methods/techniques:

Harmonic Balance – a frequency-domain technique.
Shooting Newton – a time-domain technique.

These methods allow engineers to simulate and analyze circuits under periodic conditions. Just as a dc, quiescent, operating point enables accurate predictions of gain, noise, distortion, transfer function, stability, and s-parameters. The periodic steady-state can be used to calculate the small signal response of the circuit.

What Are Harmonic Balance and Shooting Newton Methods?

Method

Domain

Best for

Use case scenarios

Harmonic Balance (HB)

Frequency

RF and millimeter wave circuits

· Amplifiers (PA, LNA)

· Frequency translation (mixers)

· Distributed elements (transmission lines)

· Phase noise and jitter analysis for LC oscillators and crystal oscillators

Shooting Newton (SN)

Time

Analog and digital circuits

· Phase noise and jitter analysis for LC oscillators and ring oscillators

· Switching circuits: dynamic comparators, sample & ,

· Frequency dividers

Key Small-Signal RF Analyses in the SpectreRF Option

Analysis	Purpose
HBAC, Harmonic Balance AC PAC, Shooting Newton AC	Analyze small-signal response around a periodic operating point.
HBNOISE, Harmonic Balance Noise PNOISE, Periodic Noise	Measure time-average noise, phase noise, and jitter.
HBXF, Harmonic Balance Transfer Function PXF, Shooting Newton Transfer Function	Evaluate conversion gain, FM sensitivity, and power supply rejection.
HBSTB, Harmonic Balance Stability PSTB, Shooting Newton Stability	Assess loop stability in oscillators, amplifiers, node impedance, and directional impedance.
HBSP, Harmonic Balance S-Parameters PSP, Shooting Newton S-Parameters	Characterize input/output reflection and transfer coefficients.

Introducing the Comprehensive Training on Small-Signal RF Analyses Using Harmonic Balance and Shooting Newton

This training provides a hands-on understanding of Small-Signal analyses using both Harmonic Balance and Shooting Newton methods within the SpectreRF Option. You’ll learn:

How to choose between HB and Shooting Newton based on circuit behavior.
How to simulate and interpret key RF metrics like conversion gain, LO leakage, phase noise, and jitter.
Practical workflows for analyzing mixers, VCOs, LNAs, and power amplifiers.
Real-world examples and demo simulations that reinforce each concept.

By the end of the course, you’ll be equipped to confidently apply these techniques in your own RF design projects—bridging the gap between simulation and silicon.

For more details, kindly navigate to the training: Small-Signal RF Analyses Using Harmonic Balance and Shooting Newton

How to Enroll

This link gives you more information regarding this course, and the link to enroll: Small-Signal RF Analyses Using Harmonic Balance and Shooting Newton

This course includes slides, audio instruction, and downloadable lab exercises, in line with the lecture content.

Earn Your Badge

This training has a Digital Badge You can earn this badge by passing the exam for this course.

Training is also available as "Blended" or "live"

You can become Cadence Certified once you complete the course and share your knowledge and certifications on social media channels. Go straight to the course exam at the Cadence ASK and Learning portal.

Note: Some of the above links are accessible only to Cadence customers who have a valid login ID for the Cadence ASK and Learning portal.

Do You Have Access to the Cadence Support Portal?

If not, follow the steps below to create your account.

On the Cadence ASK portal, select Register Now and provide the requested information on the Registration page.
You will need an email address and host ID in order to sign up.
If you need help with registration, contact ask@cadence.com.

To stay up-to-date with the latest news and information about Cadence training and webinars, subscribe to the Cadence Training emails.

If you have questions about courses, schedules, online, public or live onsite training, reach out to us at Cadence Training.

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