Download Faster, Smaller, and Higher-Density: Meeting the Challenge of the

Detective
Squad
Notebook PCs
In the world of personal computers, radical performance
improvements are being achieved continuously at a rapid
and accelerating pace, with technological innovations occurring on every front: in the speed of CPUs (central processing units, the “brains” of a personal computer); in the
capacity of hard disk drives for storing data; in the performance of the software that issues the commands that run
the computer.
At the same time, personal computers are also becoming
smaller, thinner, lighter, and less expensive, and all of
these advancements are occurring at an accelerating pace
as well. Notebook computers offering a level of performance once seen only in supercomputers are now readily
available. These innovations have been made possible by
miniaturization of components and by technological advancements that make it possible to install those components at higher density.
Faster, Smaller, and Higher-Density:
Meeting the Challenge of the Leading Edge
【Wireless LAN Interface】
• Chip inductor
【Chip Set】
• Low ESL chip capacitor
• Chip beads
• Chip inductor＊1
Chip inductor
【LVDS Transceiver】
• LVDS: Low voltage differential
signaling (An LCD interface standard)
• Common-mode filter
【CPU】
• Low ESL chip capacitor
【AC Adaptor】
• Chip inductor
• Ferrite core＊2 Ferrite core
【LCD】
• Mid-voltage chip capacitor
• Ferrite core
• DC-DC converter
• DC-AC inverter ＊6
Chip inductor
DC-AC inverter
【IEEE 1394/USB
Interface】
• Chip beads
• Common-mode filter ＊7
Common-mode filter
3
●Functions of Major Components●
＊1 Chip inductor: Used as a noise countermeasure to reduce noise in interfaces such as parallel ports. ＊2 Ferrite
core: Used as the core of transformers. Significantly reduces
core losses and promotes low heat generation and low power
consumption. ＊3 Chip beads: Cuts unnecessary high-harmonics from the DC power supply units that supply direct current to circuits. ＊4 Choke coil: A high-current compatible
noise countermeasure component. Removes the high-frequency portion of signals to reduce noise. ＊5 Low ESL chip capacitor: Used for IC decoupling (controlling unnecessary highfrequency current). ESL refers to equivalent series inductance.
＊6 DC-AC inverter: Converts direct current to high-voltage
alternating current. More than 1,000 volts is needed to turn on
liquid crystal display backlights. ＊7 Common mode filter:
Eliminates common mode noise that originates between the
line and the ground. ＊8 GMR head: Reads and writes data to
and from hard disk drives. Uses giant magnetoresistive elements in the read/write heads. The surface recording density is
60 GB per square inch. ＊9 Plunger: A type of motor that
moves in a reciprocating fashion. Used in the tray locks of optical disc drives and other components.
【DC-DC Converter】
• Three-terminal filter
• Chip beads ＊3 • Common-mode filter
• SMD inductor
• Power line inductor
• Choke coil ＊4
• Ferrite core
• DC-DC converter
Chip beads
【LAN
Interface】
• Common-mode
filter
• Ferrite core
• Pulse
transformer
Ferrite core
●Interfaces Evolving Rapidly
Hardware interfaces provide the standards for data transmission formats used
by computers and peripheral devices
such as printers. In the past, RS-232 and
SCSI were standard, but newer applications such as digital cameras and digital
video cameras required higher transmission speeds, so IEEE 1394, USB 2.0,
and the high-speed DVI interface standards were developed. Of these, DVI
(digital visual interface), which transmits
image data to displays as a digital signal,
has proliferated as format for transferring
high-quality image data with little signal
deterioration. In addition, HDMI (high
definition multimedia interface), a nextgeneration interface that will be used for
digital home appliances rather than PCs,
will achieve maximum data transmission
speeds of 5 Gbps.
Changes in Interface Transmission Speeds
USB1.1
IEEE1394
USB2.0
12Mbps
400Mbps
480Mbps
DVI
HDMI
Choke coil
【CPU】
• Low ESL chip capacitor＊5
• Chip beads
Low ESL
chip capacitor
【CPU Battery】
• Low ESL chip capacitor
• Chip beads
1Gbps
GMR heads
Plunger
【HD/DVD/CD/FD Drives】
• GMR heads ＊8
• Chip NTC thermistor
• Plunger ＊9
• Rare-earth magnet
VCM magnet • Plastic magnet
• VCM magnet
• Ferrite magnet
5Gbps
4