README.md

Runnable LTspice A-device Examples

These circuits use LTspice's native eight-terminal A... syntax and are checked by LTspiceADeviceExampleTests. They are small enough to modify while showing patterns that are useful in larger mixed-signal designs.

Example	Pattern demonstrated	Guide
clock-divider.cir	Divide-by-four clock with complementary outputs	COUNTER guide
edge-capture-dff.cir	Capture high and low data on successive clock edges	DFLOP guide
sample-and-hold-sensor.cir	Capture a ramp and retain the sample for seconds	SAMPLEHOLD guide
ota-current-limiter.cir	Symmetric Iout limiting measured through a zero-volt sense source	OTA guide
phase-detector.cir	Convert input-edge skew into a signed charge-pump voltage	PHASEDET guide
controlled-clamp-varistor.cir	Clamp positive and negative excursions to a controlled magnitude	VARISTOR guide
fm-modulator.cir	Switch between SPACE and MARK frequencies with the AM input unused	MODULATOR guide
non-ground-common-latch.cir	Use a non-ground common node and detach an unused output correctly	SRFLOP guide

Start with How to Read and Run the Examples if native A-device terminal ordering is new to you.

Compile one from C# with custom-component mappings enabled:

using SpiceSharpParser;
using SpiceSharpParser.CustomComponents;

var options = new SpiceCompileOptions
{
    Dialect = SpiceDialect.LTspice,
    ConfigureReader = settings => settings.UseCustomComponents(),
};

SpiceCompilationResult result =
    SpiceCompiler.CompileFile("clock-divider.cir", options);

Every file contains .SAVE/.PLOT waveform requests and .MEAS statements so it can be used as a simulation smoke test as well as a starting point. Remember these syntax rules when adapting an example:

• Terminal 8 is the device common node. Repeat that node in every unused terminal position; use 0 only when common really is global ground.
• MODULATOR requires both Mark and Space. Connecting its AM terminal to common marks AM as unused and selects the native default amplitude of 1.
• COUNTER requires Cycles.
• SAMPLEHOLD Td is intentionally rejected because its native timing semantics are not implemented.

For a terminal-by-terminal introduction to every supported family, see src/docs/articles/a-devices.md.