Buffer
DigiSim's one-input Buffer reproduces the sampled logic value as a driven output. Its functional model does not calculate electrical drive strength, current, loading, or edge rate.
Overview
The one-input Buffer reproduces its sampled logic value as a driven output without Boolean inversion.
DigiSim Interface
| Direction | Pin | Behavior |
|---|---|---|
| Input | A | One-bit data input. |
| Output | Y | Driven copy of the sampled input. |
Functional Behavior
A driven unknown input produces driven X. A released Z input is sampled as LOW, so this ordinary
Buffer does not preserve or generate high impedance. Use the Tri-State Buffer when an output must
release a shared net.
Simulation Boundary
The Logic Lab model does not amplify a signal or calculate drive strength, output current, load capacitance, edge rate, electrical isolation, or fan-out. Do not use its simulator delay as a device timing element.
Learning Path
Prerequisites
Next Steps
Frequently Asked Questions
What does a buffer do in digital circuits?
A buffer reproduces its input logic value at its output (0 to 0, 1 to 1). In physical hardware, an appropriately specified buffer can isolate stages and provide additional output drive.
When should I use a buffer?
Use a buffer to separate logical stages or, in physical hardware, to meet fan-out, load-capacitance, and edge-rate requirements. Do not treat an incidental gate delay as a reliable timing element.