Kingtronics Blog

Hope this greeting find you well. ~!～

Kingtronics closes on Mar.30th-Apr. 02nd for Easter, Apr. 05th for Tomb Sweeping Day.  

Never hesitate to inform us if anything we can help. ^&^

Kingtronics complete production lines: 

DIP and SMD Tact Switches

Active components:

Bridge Rectifiers, Diodes & Transistors

Axial and SMD Gas Tube Surge Arresters

Passive components:

Aluminum Elec. Capacitors

Radial/Axial Multilayer Ceramic Capacitors and Tantalum Capacitors

SMD 3mm Ceramic Trimmer Capacitor

Trimming Potentiometers

Quartz Crystals and Oscillators

Quartz Crystal Advantages:
1, Good stability, small changes;
2, Good accuracy, high precision;
3, Low power consumption, small excitation power;
4, Fixed (non-adjustable).

Quartz Crystal Structure:

Quartz Crystal also known as Quartz Crystal Oscillator. That was accomplished by means of "Piezoelectric" effect.
That is "Supply Voltage", Kingtronics common voltages are 1.8V, 3.3V, 5.0V.
The semiconductor devices and resistance capacitance element worked together, could constitute a Quartz Crystal Oscillator. 

Quartz Crystal Applications:
1, QKT-HC49U (HC-49U) suitable for electronic products with broad spaces such as communications equipment, televisions, telephones, electronic toys;
2, QKT-HC49U/S (HC-49U/S) is suitable for all kinds of space height restrictions thin and small electronic equipment and products;
3, QKT-HC49 SMD (HC-49U/S SMD) prevail surface mount products, applicable to all types of ultra-thin, small computers and electronic devices;
4, 3*8 Tuning fork Cylindrical quartz crystal resonators suitable for space-constrained timing frequency stabilization of electronic products such as timers, electronic clock, calculator, etc.

Kingtronics offers passive leaded quartz crystal HC49U, HC49S, SMD quartz crystal HC49SMD
and 3225 SMD Crystals. We also produce active 3225, 5032, 5070 SMD Oscillators.
We produce millions pieces of Quartz Crystal and SMD Oscillators monthly, the volume is keep increasing. Free samples for testing.
For more information, please visit: www.kingtronics.com/quartz-crystals/

In January 2015, in order to meet customers demands, we prepared new Quartz Crystals and Oscillators samples to SGS lab.
After two weeks, we get the updated new RoHS 2.0 Test Report .

Below is the full list of our Kingtronics RoHS report, please have a quick view.

Active Electronics Components
1. UL certification for bridge rectifiers
2. RoHS 2.0 for diode rectifier, and specially Reach 2.0 for diode M7 ( also called SMD 1N4007)

Passive Electronics Components
1, CKT---Chip Tantalum Capacitors RoHS 2.0 certificated
2, TKT---Dipped Tantalum Capacitors RoHS 2.0 certificated
3, QKT--- Quartz Crystals and Oscillators RoHS 2.0 certification 
4, MKT, AKT --- Monolithic ceramic capacitors/Axial Monolithic Ceramic capacitors/ Axial Color Ring Capacitors/ SMD Multilayer Ceramic capacitors/ Ceramic Capacitors

Above products are tested not including 155 substances of very high concern(SVHC) under Regulation(EC) No 1907/2006 of Reach.

Kingtronics products are all with RoHS certifications. Please feel free to contact with us and test our samples.

Hertz (Hz)
The basic unit of measurement of frequency. It is a measurement used to denote one complete occurrence of an event in one second.
The frequency of a crystal is measured in megahertz (MHz) or kilohertz (kHz). In Kingtronics we usually usd KHz.

Frequency 
Measured in Hertz (Hz), it is a periodic repetition of an event within a unit of time. 
In an electrical circuit, it is the number of times a resonator plate oscillates or vibrates in one second. The most common herts for Kingtroncis QKT is 32.768KHz

Frequency Tolerance
Often called Calibration Accuracy, it is the amount of frequency deviation from the specified nominal frequency at room temperature (25°C). 
This term is expressed as a minimum and maximum percent (%) or parts per million (ppm). Kingtronics can provide -20℃~+70℃, -40℃~+85℃, -10℃~+60℃

Load Capacitance
A capacitance, specified in picofarads (pF), presented to the crystal. 
The parallel load resonant frequency (FL) is a function of the load capacitance.

For more details, please refer to below link, thank you.
www.kingtronics.com/quartz-crystals/
www.abracon.com/Support/qtzcry_glossary.pdf
www.abracon.com/Support/qtzcryoscil_glossary.pdf

A quartz crystal resonator depends on the piezo-electric effect to work. This effect converts a mechanical stress in a crystal to a voltage and vice versa. In this way the piezo-electric effect converts the electrical impulses to mechanical stress which is subject to the very high Q mechanical resonances of the crystal, and this is in turn linked back into the electrical circuit.

The quartz crystal can vibrate in several different ways, and this means that it has several resonances, all on different frequencies. Fortunately the way in which the quartz crystal blank is cut from the original crystal itself can very significantly reduce this. In fact the angle of the faces relative to the original crystal axes determines many of its properties from the way it vibrates to its activity, Q, and its temperature co-efficient. There are three main ways in which a crystal can vibrate: longitudinal mode, low frequency face shear mode, and high frequency shear. A cut known as the AT cut used for most crystals used in traditional radio and electronics circuits uses the high frequency shear mode.

Vibrational modes of a quartz crystal resonator
(For the sake of clarity, the movements have been greatly exaggerated)