Innovative wideband ring voltage-controlled oscillator developed

Innovative wideband ring voltage-controlled oscillator developed

A new wideband ring voltage-controlled oscillator (VOC)* was proposed by UNIST undergraduate student, Seyeon Yoo with the the research work published in IEEE Microwave and Wireless Components Letters.

*VCO (voltage-controlled oscillator) : an electronic oscillator whose oscillation frequency is controlled by a voltage input. The applied input voltage determines the instantaneous oscillation frequency.

Wideband VCO is a key component of an IR-UWB system (Impulse radio-Ultra-wideband) which has drawn attention as a practical technology for a Doppler radar* system which can detect human vital signs such as heart beats and respiration.

*Doppler radar: a specialized radar that makes use of the Doppler effect* to produce velocity data about objects at a distance.

The IR-UWB's large signal bandwidth can yield an increased time resolution and its wide range of frequency bands is desirable because an optimal band can be selectively used to maximize detection accuracy.

With the new VCO designed by the UNIST research team led by Prof. Jaehyouk Choi and proposed by a UNIST undergraduate student, Seyeon Yoo, an operating frequency band is digitally set using a digital-to-analog convert (DAC) in the supply-voltage regulator.

Once a band is selected, the specific target-frequency is analogously tuned, controlling the strength of latches in delay cells. Furthermore, by storing the latches in each cell, the KVCO becomes scalable.

Ultimately, throughout the entire 2-8 GHz frequency band, the KVCO can be constantly maintained, which helps ensure the stable operation of the phase-locked loop* (PLL).

*phase-locked loop: a control system which generates an output signal whose phase is related to the phase of input signal.

"This technology will be applicable for IR-UWB based Doppler radar systems and various radio frequency (RF) semiconductor applications since it provides stable wideband frequency," said Prof. Choi.

He also specially praised Yoo: "Developing an analog/RF integrated circuit (IC) chip requires extensive knowledge and know-how on IC designs. As an undergraduate student, developing a new IC and publishing a research paper in a leading science journal is a remarkable performance."

Welcome to SUV System Ltd!

SUV System Ltd is ISO 90012008 Certified electronics distributor with 10 years of experiences.

We have built up long term business relationship with about many companies which are stockers and authorized agents. we have a steady and reliable supply to meet customer's demands to the greatest extent .Confidently, we are able to lower your cost and support your business with our years of professional service.

SUV System Ltd is Electronic Components Distributor Supplies,Find Quality Electronic Components Supplies Products IC(Integrated Circuits),Connectors,Capacitor,Resistors,Diodes,Transistors,LED at Suvsystem.com. Sourcing Other Energy, Environment, Excess Inventory Products from Manufacturers and Suppliers at Suvsystem.com

Electronic Components distributor:http://www.suvsystem.com

Connectors Distributor:http://www.suvsystem.com/l/Connectors-1.html

IC Distributor:http://www.suvsystem.com/l/IC(Integrated-Circuits)-1.html

LED Distributor:http://www.suvsystem.com/l/LED-1.html

Capacitor Distributor:http://www.suvsystem.com/l/Capacitor-1.html

Transistor Distributor:http://www.suvsystem.com/l/Transistors-1.html

Resistor Distributor:http://www.suvsystem.com/l/Resistors-1.html

Diode Distributor:http://www.suvsystem.com/l/Diodes-1.html

SUV System Ltd insists on the managing faith ofsincereness,speciality,foresight, win-win,so we build up stable-relationship customers located all over the world, including the States, Europe, Argentina, UAE, Malaysia, Australia,and India etc

we are focus on the following fields,and hope we can help you.

DIODES Transistors Voltage Regulators Transistors TOSHIBA Transistors LITTELFUSE Diodes NEC Transistors INTERSIL IC INFLNEON Diodes IDT IC Microchip IC IR transistor ON Diodes Dialight LED Chip Fuses MAXIM IC Current Sensors Resistors Chip Ferrite Beads Switches MOTOROLA IC Transistors Fairchild Semiconductor Transistors Infineon Technologies Transistors BB IC ALTERA IC NS IC About US Xilinx IC Vishay resistors Diodes Cypress IC Civil IC Metal Can Packages Transistors Diodes Inc Resistor Networks Fleld Effect Transistors AD IC MURATA IC LINEAR IC Fast Recovery Diodes Bipolar Transistors PANASONIC
http://www.suvsystem.com/a/6453.aspx