020 026 1103 lithium battery,battery charger,laptop battery

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slatsyrC ComponentsMarketplaceSpecialReport:Crystals|March2011 Crystals Oscillating with accuracy For almost every electronics application, from microprocessor timing to radio station transmission, precise frequency control is critical. In order to enable system synchronization and signal generation, a reference signal or source is generally required for data transfer and communication. Oscillator, at the heart of most reference sources, produces an output signal without input signal. By injecting energy composed of noise or the transient power supply response, the start up of oscillator can be achieved. Crystal Resonators HC series, SMD series, DIP series, VCXO, TCXO Rohs, compliant No Pb Anhui Safe Electronics Co Ltd SMD Quartz Crystal Gen-Worldly Quartz Crystal Co Ltd 1103 SR_ECMP.indd 46 2011-1-25 15:42:29 Lithium Battery

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Transcript of 020 026 1103 lithium battery,battery charger,laptop battery

Page 1: 020 026 1103 lithium battery,battery charger,laptop battery

slatsyrC

ComponentsMarketplaceSpecialReport:Crystals|March2011

Crystals

Oscillating

with accuracy For almost every electronics application, from microprocessor timing to radio station transmission,

precise frequency control is critical. In order to enable system synchronization and signal

generation, a reference signal or source is generally required for data transfer and communication.

Oscillator, at the heart of most reference sources, produces an output signal without input signal.

By injecting energy composed of noise or the transient power supply response, the start up of

oscillator can be achieved.

Crystal Resonators

• HC series, SMD series, DIP series, VCXO, TCXO

• Rohs, compliant

• No Pb

Anhui Safe Electronics Co Ltd

SMD Quartz Crystal

Gen-Worldly Quartz Crystal Co Ltd

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Lithium Battery

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ComponentsMarketplace

Ceramic Crystal

Resonator (SMD) • All ceramic enclosure

• Frequency available from

3.2768MHz ~ 50MHz

• Initial tolerance up to

±20ppm

• RoHS compliant

• Lead free reflow

solderable

• Package sizes available

from 3.2x2.5mm to

10x4.5mm

Interquip Electronics

Company Ltd

Through the utilization of piezoelectric properties of

various materials, such as ceramic, Rochelle salt, tourmaline

and silicon dioxide (quartz crystals), signals are produced

by resonators and filters. Among these materials, quartz

crystals are frequently used.

Mechanical considerations like vibration, shock and

handling are as important as electrical considerations

for frequency control devices. These devices need to be

handled more carefully than most of the other electronic

components, as they are fragile despite seemingly rugged

packaging.

A feedback network and an amplifier are essential building

blocks for a crystal oscillator. Incorporating a resonator with

an active device and several discrete components, a stand-

alone frequency control device can be produced.

Traditionally speaking, companies specializing in

frequency control products design and manufacture them.

Nowadays, the design and manufacture of crystals and

amplifiers are carried out by separate companies, which

changed the paradigm.

Clock oscillators Being one of the subsets of the general crystal oscillators,

clocks are frequently used to supply frequency timing

to digital circuits and microprocessors. As they are the

simplest of all types of oscillators, they are smaller in size,

consuming less power and more affordable than the

others.

Clocks require only one power supply voltage for operation

and take only a few milliseconds to start up. They can be

found in digital integrated circuits like TTL, CMOS, ECL and

so on. Based on the technology being driven, like 75 MHz

for STTL and 125 MHz for 10k ECL, the frequency range of

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slatsyrC

ComponentsMarketplaceSpecialReport:Crystals|March2011

Crystals these clocks is initially limited.

Among different crystal cuts that

determine the frequency characteristics

of crystals, AT cut is most commonly

used. Calibration frequency tolerances of

below ∮10ppm can be obtained by clocks.

Depending on the temperature change

of critical resistors, capacitors or inductors,

the oscillator circuit could add to the

crystal drift, although its significance in

frequency variation would be limited.

Voltage controlled

crystal oscillators Voltage controlled crystal oscillators

(VCXOs) enable fine adjustments of

output frequencies through changing the

voltage of control pins of oscillators. They

are suitable for applications that require an

accurate external reference. The oscillator

circuits with a given voltage change

influence the amount of frequency shift.

In most cases, varactor diodes are utilized

to vary the frequency by changing

the capacitance across their terminals

based on the DC voltage across the

same terminals. Only a small range of

frequencies, however, can be varied by

these oscillators due to the limitations

imposed by high Q factor of crystals.

Temperature

compensated crystal oscillator Temperature compensated crystal

oscillator (TCXO) adjusts the frequency

for temperature variation. In order to

compensate for the aging of the crystal

over time, they generally have an outside

adjustment for setting the calibration

frequency periodically. Depending on

the level of accuracy required, the period

between calibrations might range from

Piezoelectric Ceramic

Devices & Quartz Crystals Chequers Electronic (China) Ltd

Crystal oscillators (Model DOC5204)

• High-stability solution OCXO for CDMA, VSAT and

switching applications

• Temperature drift: 0.2ppb

• Ageing: less than 20ppb per year

• Phase noise: -120dBc/Hz at 10Hz

• Ageing: less than 500ppb per year

• Package: metallic through-hole 50mm x 50mm x 38mm

Shenzhen Nearzenith Technologies Co Ltd

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Battery Charger

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ComponentsMarketplace

Crystal Resonators

• HC series, SMD series, DIP series, VCXO, TCXO

• Rohs, compliant

• No Pb

Anhui Safe Electronics Co Ltd

Crystal Resonator

• Compact and thin (3.2× 2.5× 0.65mm typ)

• Both sides supporting structure

advantageous to shock resistance

• Excellent for applications in mobile

communications

• Frequency Range: 12.000MHz~50.000MHz

• Frequency tolerance: ± 30ppm Max

• Storage temperature range: -40ºC to +85ºC

• Load capacitance: 9pF typ

Wuhan HDC Technology Co Ltd

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slatsyrC

ComponentsMarketplaceSpecialReport:Crystals|March2011

Crystals Quartz Crystal Resonators

(SMD)

• All quartz enclosure • Frequency available from

3.2768MHz ~ 50MHz

• Initial tolerance up to

±20ppm

• RoHS compliant

• Lead free reflow solderable

• Package sizes available from

3.2x2.5mm to 10x4.5mm

Interquip Electronics Company Ltd

Piezoelectric Ceramic

Devices & Quartz Crystals Chequers Electronic (China) Ltd

Crystal oscillators (Model DOC5525)

• Designed for test & measurement,

switches, GPS synchronization

applications, VSAT and DAB

infrastructure

• Cost effective OCXO solution • Temperature drift: less than 200ppb

• Phase noise: -90dBc/Hz at 10Hz

• Ageing: less than 500ppb per year

• Package: 25.4mm x 22mm x 10mm

Shenzhen Nearzenith Technologies Co Ltd

Dip-14 Oscillator Gen-Worldly Quartz Crystal Co Ltd

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ComponentsMarketplace

Dip-8 Oscillator

HC49/U Quartz crystal Gen-Worldly Quartz Crystal Co Ltd

Gen-Worldly Quartz Crystal Co Ltd

High-temp Crystal Oscillator

• Frequency Range: 32.768K-160.000M

• Frequency Stability: 25PPM

• Supply Voltage: 3.3v 5.0v

• Current: 25-90MA

• TS: 10MS

• TR/TF: 10NS

• Operation Temperature: -40ºC~175ºC

• Storage Temperature: -40ºC~70ºC

• Symmetry: 45%-55%

• Output Load: 10TTL/HCMOS

• Dimensions: 20mmx 13.2mmx 5.5mm &13.2mmx 13.2mmx 5.5mm

Wuhan HDC Technology Co Ltd

Crystal oscillators (Model DOC5383)

• Cost-effective SC-cut OCXO • Temperature drift: 10ppb

• Phase noise: -120dBc/Hz at 10Hz

• Ageing: less than 100ppb per year

• Package: metallic through-hole

36mm x 26mm x 18mm

Shenzhen Nearzenith Technologies Co Ltd

once a month to once a year. A TCXO has a larger size,

higher cost and longer start-up time than a clock oscillator.

Oven controlled crystal oscillator Oven controlled crystal oscillator (OCXO) stabilize

frequency variations with an oven. In the instrumentation

market, they are popular timing standards in measurement

equipments such as frequency counters, spectrum

analyzers and network analyzers. Every oven contains

at least a sealed crystal. The oven temperature must be

higher than the maximum ambient temperature expected

in the application in order to maintain control. The cost

and overall size of an OCXO is about 40 times of a clock

oscillator, as it requires periodical calibrations, a separate

power supply for the heater and isolation between

building blocks.

Combination of crystal oscillators Meeting the needs of special applications, combinations

like Temperature Compensated, Voltage Controlled

Crystal Oscillator (TCVCXO) and Oven Controlled,

Voltage Controlled Crystal Oscillator (OCVCXO) have

been developed. These designs are gaining popularity

in applications that previously require several different

oscillators, as various dividers can produce various output

frequencies.

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slatsyrC

ComponentsMarketplaceSpecialReport:Crystals|March2011

Crystals Anhui Safe Electronics Co Ltd

Address: North of Weiyi Road, Shizishan Economic

Development Zone, Tongling, Anhui, China

Tel: +86 (0562) 2828 608; +86 (0562) 2828 238

Fax: +86 (0562) 2828 708; +86 (0562) 2855 972

E-mail: [email protected]

Homepage: www.anhuisafe.com

Chequers Electronic (China) Ltd

Address: Room 1101-3, Mongkok Commercial Centre, 16

Argyle Street, Mongkok, Kowloon, Hong Kong

Tel: +852 2391 6725

Fax: +852 2789 3205

E-mail: [email protected]

Homepage: www.chequers-electronic.com

Gen-Worldly Quartz Crystal Co Ltd

Address: Unit 403-404, 4/F, Sun Ling Plaza, 30 On Kui

Street, On Lok Tsuen, Industrial Area, Fanling, New

Territories, Hong Kong

Tel: +852 2675 8976

Fax: +852 2675 4792

E-mail: [email protected]

Homepage: www.gen-worldly.com.hk

CONTACT INFORMATION Interquip Electronics Company Ltd

Address: Flat A, 9/F, On Shing Industrial Building, 2-16

Wo Liu Hang Road, Fotan, New Territories, Hong Kong

Tel: +852 2413 5515

Fax: +852 2413 7053

E-mail: [email protected]

Homepage: www.interquip.com

Shenzhen Nearzenith Technologies Co Ltd

Address: 5/F, 51Building, 5 QiongYu Road, High-tech

Industrial Park, Nanshan District, Shenzhen, China

Tel: +86 (755) 8610 0308; +86 (755) 8610 0942

Fax: +86 (755) 8610 1078

E-mail: [email protected]

Homepage: www.nearzenith.com

Wuhan HDC Technology Co Ltd

Address: International Business Center (3rd), Jinfeng

Building A305, Donghu Hi-Tech Development Zone,

Wuhan, Hubei, China

Tel: +86 (27) 8774 5207

Fax: +86 (27) 8759 2096

E-mail: [email protected]

Homepage: www.wuhanhdc.com

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