Cadence® system design and verification solutions, integrated under our Verification Suite, provide the simulation, acceleration, emulation, and management capabilities.
Verification Suite Related Products A-Z
Cadence® digital design and signoff solutions provide a fast path to design closure and better predictability, helping you meet your power, performance, and area (PPA) targets.
Full-Flow Digital Solution Related Products A-Z
Cadence® custom, analog, and RF design solutions can help you save time by automating many routine tasks, from block-level and mixed-signal simulation to routing and library characterization.
Overview Related Products A-Z
Driving efficiency and accuracy in advanced packaging, system planning, and multi-fabric interoperability, Cadence® package implementation products deliver the automation and accuracy.
Cadence® PCB design solutions enable shorter, more predictable design cycles with greater integration of component design and system-level simulation for a constraint-driven flow.
An open IP platform for you to customize your app-driven SoC design.
Comprehensive solutions and methodologies.
Helping you meet your broader business goals.
A global customer support infrastructure with around-the-clock help.
More Support Log In
24/7 Support - Cadence Online Support
Locate the latest software updates, service request, technical documentation, solutions and more in your personalized environment.
Cadence offers various software services for download. This page describes our offerings, including the Allegro FREE Physical Viewer.
The Cadence Academic Network helps build strong relationships between academia and industry, and promotes the proliferation of leading-edge technologies and methodologies at universities renowned for their engineering and design excellence.
Participate in CDNLive
A huge knowledge exchange platform for academia to network with industry. We are looking for academic speakers to talk about their research to the industry attendees at the Academic Track at CDNLive EMEA and Silicon Valley.
Come & Meet Us @ Events
A huge knowledge exchange platform for academia. We are looking for academic speakers to talk about their research to industry attendees.
Americas University Software Program
Join the 250+ qualified Americas member universities who have already incorporated Cadence EDA software into their classrooms and academic research projects.
EMEA University Software Program
In EMEA, Cadence works with EUROPRACTICE to ensure cost-effective availability of our extensive electronic design automation (EDA) tools for non-commercial activities.
Apply Now For Jobs
If you are a recent college graduate or a student looking for internship. Visit our exclusive job search page for interns and recent college graduate jobs.
Cadence is a Great Place to do great work
Learn more about our internship program and visit our careers page to do meaningful work and make a great impact.
Get the most out of your investment in Cadence technologies through a wide range of training offerings.
Overview All Courses Asia Pacific EMEANorth America
Instructor-led training [ILT] are live classes that are offered in our state-of-the-art classrooms at our worldwide training centers, at your site, or as a Virtual classroom.
Online Training is delivered over the web to let you proceed at your own pace, anytime and anywhere.
Exchange ideas, news, technical information, and best practices.
The community is open to everyone, and to provide the most value, we require participants to follow our Community Guidelines that facilitate a quality exchange of ideas and information.
It's not all about the technology. Here we exchange ideas on the Cadence Academic Network and other subjects of general interest.
Cadence is a leading provider of system design tools, software, IP, and services.
Get email delivery of the Cadence blog featured here
This posting is part of a series of blogs on dynamic power management in digital-centric mixed-signal verification environments. In this post, I will cover error detection.
My previous blogs covered some of the following topics:
1. Basics of dynamic power management2. Very brief introduction to RNM (Real Number Modeling) for efficient simulation of mixed signal SoCs3. How to create a controlled voltage source using a Specman testbench4. Closed-loop voltage scaling5. Simulation of closed-loop adaptive voltage scaling
Previous postings include:
Controlled voltage source error detection
You may have a situation where a tightly controlled voltage source is created in the testbench, and noise is injected in the form of IR drop, switching and other noise sources. The level of noise is carefully controlled as test stimulus.
A noisy voltage source such as a battery supply that varies over time, and also drifts with temperature and use, can be created as shown in Figure 1. Error conditions like low and dead battery need to detected and tracked as seen in Figure 1.
Figure 1: Controlled Voltage Source with error detection
Voltage scaling error detection
The fundamental task of any verification exercise is the detection of errors. In this example, randomly generated noise is injected into the regulated output of the LDOs to emulate the effects of switching noise and IR drop on voltage of each power domain. This results in glitches, some of which occur close to the transitions of the nominal voltages of a given power domain, thus causing faulty voltage transitions.
It is important to detect glitches larger than a specified size and duration. Checkers are put in place to detect these. Any time these conditions are violated, the entire power domain is corrupted, as shown in Figure 2.
Errors are also detected by creating mixed-signal assertions that track expected behavior across the digital/analog boundary.
In the next blog, I will talk about Analog coverage and metrics.
Stay tuned for more...