Emitter

Emitter may refer to:

Look up emitter in Wiktionary, the free dictionary.

Devices which emit charged particles:

• Cathode, or negative electrode, in a vacuum tube or diode
• Anode, or positive electrode, in certain applications based on the emission of ions from a solid surface
• One of the three terminals of a bipolar transistor

Devices which emit electromagnetic radiation:

• Lambertian emitter, a light source whose radiance varies with angle according to Lambert's cosine law
• An infrared LED used to emulate a remote control

Other uses:

• A device used in drip irrigation
• A compiler's code generator