voltage-dependent resistor
121Piezoresistive effect — The piezoresistive effect describes the changing electrical resistance of a material due to applied mechanical stress. The piezoresistive effect differs from the piezoelectric effect. In contrast to the piezoelectric effect, the piezoresistive… …
122Flicker noise — is a type of electronic noise with a 1/f, or pink spectrum. It is therefore often referred to as 1/f noise or pink noise, though these terms have wider definitions. It occurs in almost all electronic devices, and results from a variety of effects …
123Phasor (sine waves) — In physics and engineering, a phase vector ( phasor ) is a representation of a sine wave whose amplitude (A), phase (θ), and frequency (ω) are time invariant. It is a subset of a more general concept called analytic representation. Phasors reduce …
124Log amplifier — Log Amplifier(Using OPAMP) IntroductionA log amplifier is the one for which the output voltage Vout is K times the natural log of the input voltage Vin. Numerically, V {out} = K lnfrac{V {in{V {ref Vref is the normalization constant in volts, K… …
125Lumped capacitance model — A lumped capacitance model, also called lumped system analysis,[1] reduces a thermal system to a number of discrete “lumps” and assumes that the temperature difference inside each lump is negligible. This approximation is useful to simplify… …
126Distributed amplifier — Distributed amplifiers are circuit designs that incorporate transmission line theory into traditional amplifier design to obtain a larger gain bandwidth product than is realizable by conventional circuits. N stage traveling wave amplifier …
127Tanning lamp — Tanning lamps (sometimes called tanning bulbs in the United States or tanning tubes in Europe) are the part of a tanning bed, booth or other tanning device which produces ultraviolet light responsible for tanning. While there are literally… …
128Photodiode — Three Si and one Ge (bottom) photodiodes Symbol for photodiode …
