science

VHDL-AMS

VHDL-AMS is a science topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand VHDL-AMS rather than just read about it. In short: VHDL-AMS is a derivative of the hardware description language VHDL (IEEE 1076-2002). It includes analog and mixed-signal extensions (AMS) in order to define the behavior of analog and mixed-signal systems (IEEE 1076.1-2017).

Key takeaways

VHDL-AMS belongs to science; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect VHDL-AMS to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of VHDL-AMS from memory before moving on to harder problems.

Reference excerpt

VHDL-AMS is a derivative of the hardware description language VHDL (IEEE 1076-2002). It includes analog and mixed-signal extensions (AMS) in order to define the behavior of analog and mixed-signal systems (IEEE 1076.1-2017). The VHDL-AMS standard was created with the intent of enabling designers of analog and mixed signal systems and integrated circuits to create and use modules that encapsulate high-level behavioral descriptions as well as structural descriptions of systems and components. VHDL-AMS is an industry standard modeling language for mixed signal circuits. It provides both continuous-time and event-driven modeling semantics, and so is suitable for analog, digital, and mixed analog/digital circuits. It is particularly well suited for verification of very complex analog, mixed-signal and radio frequency integrated circuits.

Code example In VHDL-AMS, a design consists at a minimum of an entity which describes the interface and an architecture which contains the actual implementation. In addition, most designs import library modules. Some designs also contain multiple architectures and configurations. A simple ideal diode in VHDL-AMS would look something like this:

VHDL-AMS Simulators ANSYS Simplorer Cadence Virtuoso AMS Designer Dolphin Integration SMASH Mentor Graphics Questa ADMS Mentor Graphics SystemVision Synopsys SaberRD

References

See also Verilog-AMS, the Analog and Mixed Signal derivative of the Verilog hardware description language VHDL Electronic design automation Very-large-scale integration Modelica, a language for modeling physical systems

Worked examples

Example 1 — a first encounter with VHDL-AMS

Start with the simplest possible case. Write down what VHDL-AMS claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to VHDL-AMS before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about VHDL-AMS ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of VHDL-AMS

In research: VHDL-AMS appears in science research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses VHDL-AMS in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: VHDL-AMS is common in secondary-school and first-year university syllabi. It links to neighbouring topics Hardware description languages, so understanding it makes those chapters shorter.
In everyday life: Look for VHDL-AMS outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study VHDL-AMS in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what VHDL-AMS means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain VHDL-AMS out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is VHDL-AMS in simple terms?

Why does VHDL-AMS matter?

Because it connects several science ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study VHDL-AMS?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on VHDL-AMS.