grounded capacitance
21Valve transmitters — Most high power transmitter amplifiers are of valve construction because of the high power required.Anode circuitsSince valves are designed to operate with much higher resistive loads than solid state devices, the most common anode circuit is a… …
22electricity — /i lek tris i tee, ee lek /, n. 1. See electric charge. 2. See electric current. 3. the science dealing with electric charges and currents. 4. a state or feeling of excitement, anticipation, tension, etc. [1640 50; ELECTRIC + ITY] * * *… …
23Metamaterial antenna — This Z antenna tested at the National Institute of Standards and Technology is smaller than a standard antenna with comparable properties. Its high efficiency is derived from the Z element inside the square that acts as a metamaterial, greatly… …
24AT Attachment — Infobox connector name=AT Attachment with Packet Interface type=Internal storage device connector logo= caption=ATA connector on the left, with two motherboard ATA connectors on the right. designer=Western Digital, subsequently amended by many… …
25Virtual ground — In the theory of electrical networks, a virtual ground ( or virtual earth) is a node of the circuit that is maintained at a steady reference potential, without being connected directly to the reference potential. In some cases the reference… …
26Diode — Figure 1: Closeup of a diode, showing the square shaped semiconductor crystal (black object on left) …
27Electronic amplifier — A practical amplifier circuit An electronic amplifier is a device for increasing the power of a signal. It does this by taking energy from a power supply and controlling the output to match the input signal shape but with a larger amplitude. In… …
28Common emitter — Figure 1: Basic NPN common emitter circuit (neglecting biasing details). In electronics, a common emitter amplifier is one of three basic single stage bipolar junction transistor (BJT) amplifier topologies, typically used as a voltage amplifier.… …
29Isolation transformer — An isolation transformer is a transformer, often with symmetrical windings, which is used to decouple two circuits. An isolation transformer allows an AC signal or power to be taken from one device and fed into another without electrically… …
30Electroscope — An electroscope is an early scientific instrument that is used to detect the presence and magnitude of electric charge on a body. It was the first electrical measuring instrument. The first electroscope, a pivoted needle called the versorium ,… …
