active area


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active area

[′ak·tiv ′er·ē·ə]
(electronics)
The area of a metallic rectifier that acts as the rectifying junction and conducts current in the forward direction.

active area

The active area is the top part of the chip where all the action takes place. It contains the layers of transistors, resistors and interconnections that make up the circuits and perform the actual computing. Although the thickness of the entire chip is only about 1/30th of an inch, the active area is just a few micrometers. See chip and Boolean logic.

Entirely Magical
No man-made object is more incredible than the CPU chip. Today's state-of-the-art CPUs contain billions of transistors, many millions of which are simultaneously switching their state from on to off and off to on every second. In fact, so many transistors are changing at the same time that, in total, there are quadrillions of transistor state changes taking place every second. Think about that number... quadrillions of changes every second! Second after second, minute after minute, hour after hour. See transistor.


A Digital Miracle
When people look at a chip package, they see an object the size of a cracker, but its active area is thinner than a postage stamp. CPU packages can be as large as this or as small as the tip of a lead pencil (see microcontroller). See Boolean logic and chip package.
References in periodicals archive ?
Current-voltage data was acquired using a Keithley K2410 Voltage Source Meter at room temperature using an AM1.5 Global Oriel NRC-96000 Solar Simulator, and the active area increase was performed using black cardboard masks avoiding the well-known edge effects [45] as only the "nominal" active area is illuminated and tested.
Using larger active area crystals allows the analyst to make-up the loss of count rate due to scatter.
The new metal-oxide semiconductor field-effect transistor packs its active area -- 1/75,000 the cross-section of a human hair -- into a space 1/20 the size of any previous transistor, according to Clive M.
The S8745 is designed with a TO-5 package and has an active area of 2.4 mm X 2.4 mm while the S8746 uses a TO-8 housing and has an active area of 5.8 mm X 5.8 mm.
The active area of each element in the 5 X 5 element photo diode array is 1.3 mm X 1.3 mm with an element pitch of 1.5 mm.
The brochure contains information on various types of InGaAs PIN photodiodes with different active area sizes, including standard, long wavelength, IR detector modules with preamplifiers, and linear image sensors and photodiode arrays.
The G8941-01, with an active area of fi mm, has a typical dark current of 1 nA and typical terminal capacitance of 90 pF.
By synthesizing this active area, the scientists designed an agent that competes with native fibronectin and inhibits its effects on cultured cancer cells.
The center element diameter is 4 mm, with a 12.57 [mm.sup.2] active area. The outer ring has a 10 mm diameter and a 58.91 [mm.sup.2] active area, with a 1.0 mm separation gap.
It kicks back now and then with earthquakes and volcanoes, so it's known to be a geologically active area. But scientists on Leg 107 of the Ocean Drilling Program were surprised to find just how active an area it has been over the past 5 million years or so.
To further speed up the device, the active area (gate) within each transistor is as short as possible, much less than a micron across.
Measures for reducing social, economic and environmental losses associated with possible earthquakes in seismically active areas, as well as increasing the preparedness of urban and rural populations, buildings and structures, transportation and communication systems for such natural disasters are outlined in the document.

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