How many transistors are there in the CPU?
A semiconductor device is an electronic component that relies on the electronic properties of a semiconductor material (primarily silicon, germanium, and gallium arsenide, as well as organic semiconductors) for its function.
Most transistors are made of very pure silicon, some are made of germanium, but certain other semiconductor materials are sometimes used. In a field effect transistor, the transistor may have only one charge carrier, or in a bipolar junction transistor device it may have two charge carriers. Compared to vacuum tubes, transistors are generally smaller and require less power to operate. Certain vacuum tubes have advantages over transistors at very high operating frequencies or high operating voltages. Many types of transistors are manufactured to standardized specifications by multiple manufacturers.
It consists of semiconductor material and usually has at least three terminals for connecting electronic circuits. A voltage or current_ is applied to one pair of terminals of a transistor, controlling the flow of current through the other pair of terminals. Because the controlled (output) power may be higher than the controlled (input) power, the transistor can amplify the signal. Some transistors are individually packaged, but more are embedded in integrated circuits.
| prefix | Type and use |
|---|---|
| 1N | End -end devices, such as diode |
| 2N | Three -terminal device, such as transistor or single ranchFarming Effect Crystal Tube |
| 3N | Four -end device, such as double grid field effect crystal tube |
The separated transistor can be a separate package of the transistor or the unpacking transistor chip (nude).
There are many differences in the transistorSemiconductor packagingEssenceThe two categories arePass hole(orlead)andSurface, Also known asSurface paste device（SMD）。Railial array( BGA& nbsp;) is the latest surface installation package.It has a solder "ball" at the bottom to replace the lead.Because they are smaller and shorter, SMD has better high -frequency characteristics, but the rated power is lower.
Crystal packaging is made of glass, metal, ceramic or plastic.Packaging usually specifies the rated power and frequency characteristics.The power transistor has a larger packaging, which can be sandwichedheat sinkTo enhance the cooling effect.In addition, most power transistors are connected to the metal shell.In another extreme, some surface pastemicrowaveThe transistor is as small as sand.
existComputer hardwaremiddle,CPU slotorCPU slotContains one or more mechanical components, providedmicroprocessorandA printed circuit board(PCB) Mechanical and electrical connection.This allows placing and replacing without weldingCentral processing unit (CPU).
Ordinary sockets have a fixed -fixing clip that applies constant force, and the fixed clip must be overcome when inserting the device.For chips with many pins, the first choiceZero(Zif) socket.Common sockets includePinch grid array(PGA) orPill grid array(LGA).Once the handle (PGA type) or surface board (LGA type) is installed in place, these designs will be appliedCompression force.This provides excellent mechanical maintenance, while avoiding bending when inserting the chip into the socketRisk of pin.Use of certain equipmentRailial array(BGA) socket, although these need to be welded and are usually not considered to be replaced by users.
CPU slot is used for desktop and server computersMotherboardsuperior.Because they are allowed to easily exchange components, they can also be used for the prototype design of the new circuit.The laptop usually uses the surface sticker CPU. Compared with the socket parts, it occupies less space on the motherboard.