Thursday, March 15, 2007

Integrated Circuits



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Nowadays, people and companies want to try to make smaller and smaller integrated circuits. In order to do this, low-power optical devices, like lasers, are needed, Tom Savels tells PhysOrg.com. Savels, a scientist at the FOM Institute for Atomic and Molecular Physics in Amsterdam,...Creating a nanoscale laser


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Monday, February 26, 2007

LTM190E1-L03 – A PERFECT CHOICE IN THE DOMAIN OF COLOR ACTIVE MATRIX TFT – LCD

LTM190E1-L03 is Samsung Electronics’ color active matrix TFT in the range of liquid color displays (LCD). Like all other similar components in the LCD market, as launched by various other reputed manufacturers, LTM190E1-L03 too deploys amorphous silicon TFTs as switching devices and, is composed of a TFT LCD panel, a driver circuit and a backlight system. A study of the specifications and key outline features of LTM190E1-L03 however, prompts a decision to opt for an LTM190E1-L03 against other available substitutes.

The Key Differentiators

LTM190E1-L03, to begin with, has a high contrast ratio, high aperture structure and a wide viewing angle. The speed response rate too is quite high and the device is pocket friendly. It is a low power consumption component. Owing to its compact design, LTM190E1-L03 can fit in smartly. It operates on the PVA (Patterned Vertical Alignment) mode and has low voltage differential signaling interface of about 2 pixels / clock. LTM190E1-L03 operates in DE only mode and the structure has two dual CCFTs (Cold Cathode Fluorescent Tubes).

Optical Characteristics

The contrast ratio of LTM190E1-L03 is 600, the rising response time is 15msec and the falling response time is 10msec. Luminance of white reading is 250cd/m2 and the perfect viewing angle is 85 degrees. Brightness uniformity is 25% and the color chromaticity varies with colors.

The mentioned features qualify LTM190E1-L03 for use in workstations and desktop monitors, in display terminals for AV application products and in monitors for industrial machinery.

Monday, February 19, 2007

LT121SS-105 TFT - LCD – AN INGENIOUS ELECTRONIC DEVICE BY SAMSUNG ELECTRONICS

LT121SS-105 is a sleek and lightweight color active matrix TFT (Thin Film Transistor) Liquid Crystal Display (LCD). The smart product is manufactured by SAMSUNG Electronics and uses amorphous silicon TFT as switching device. The components of the thin LT121SS-105 LCD, in addition TFT LCD panel include, a driver circuit and a backlight system.

General Details About LT121SS-105

A 12.1” LT121SS-105 LCD has a SVGA resolution of 800 X 600 pixels and can display up to 2,62,144 colors. The other features include high contrast ratio, high aperture structure, high-speed response, low power consumption and single CCFL (Cold Cathode Florescent Lamp).

The display specifications of the LT121SS-105 LCD are 246 (H) X 185.4 (V) mm. The driver element is an a-is TFT active matrix and the pixel arrangement is RGB vertical stripe. The dimensions for the pixel pitch are 0.3075 (H) X 0.3075 (V) mm. The default display mode is white and the surface treatment is Haze 25, hard coating (3H). The optimum viewing angle for LT121SS-105 LCD is in the 6 o’clock direction. The device requires 3.3 V of power supply.

The mentioned features and the smart structure of the Samsung LT121SS-105 LCD marks it as an appropriate choice for usage in a host of applications like functionally deploying it in notebook PC and desktop monitors or for use in display terminals for AV application products or in monitors for industrial machine. The basic precautions as applicable to an LCD are true for LT121SS-105 as well.

Friday, February 16, 2007

CM600DY-34H – A HIGH POWER HVIGBT MODULE

CM600DY-34H manufactured by POWEREX is a HVIGBT, high power insulated type module used in switching applications where HVIGBT stands for High Voltage Insulated Gate Bipolar Transistor. The packaging of CM600DY-34H contains two elements in one pack and the electrical device can be used for various applications including inverters, converters, DC choppers, induction heating and DC-to-DC converters.

Details Of The Maximum Ratings And Electrical Characteristics Of CM600DY-34H

The details furnished below corresponding to CM600DY-34H are true given a device Junction Temperature of 25oC.

The Collector Emitter Voltage rating is 1700 V, the Gate Emitter Voltages count is +- 20V and the Isolation Voltage is 4000 V. The Collector and Emitter Current refers to a figure of 600 Amp (pulse = 1200 Amp) and the maximum Collector Dissipation is 6200 W. The typical Mass value of CM600DY-34H is 1.5 Kg and the Storage Temperature range is from – 40oC to + 125oC.

As for the important Electrical Characteristics of CM600DY-34H, the Collector Cutoff Current must not exceed a maximum of 12 mA and the maximum limit for Gate Leakage Current is 0.5 μA. The optimal Gate emitter threshold voltage is 5.5 V and the Collector emitter saturation voltage for the concerned type is 2.75 V. The Input Capacitance is 70 nF, Output Capacitance is 10 nF and the Reverse Transfer capacitance is 3.8 nF. The respective figures for Turn on delay time, turn on rise time and the turn off delay time are a maximum of 1.20 μS, 1.50 μS and 2 μS.

Monday, February 12, 2007

LQ9D011 – An Active Matrix Liquid Crystal Display Module

LQ9D011, the color TFT-LCD (abbreviated name for Liquid Crystal Display) module as introduced by Sharp in the markets, incorporates the amorphous silicon thin film transistor. The components of the LQ9D011 module in addition to the mentioned transistor include a color TFT-LCD panel, control circuit, driver ICs and power supply circuit.

The default display mode of the LQ9D011 module is white and the screen size is 8.4 cm. The perfect viewing angle is 6 O’clock and the outline dimensions are 243.5 (W) X 180 (H) X 12 (D) mm. The other mechanical specifications refer to the active area which is 170.9 (H) 129.6 (V) and a pixel pitch of 0.267 (H) X 0.270 (V). The display qualities of a LQ9D011 are in line with the Delivery Inspection Standards.

Handling Precautions of LQ9D011

LQ9D011 is a sensitive device and must be handled with caution. Disassembling the module can cause damage and therefore, must be strictly avoided. The vendor also sets the adjusting volumes before handing over the module to user, therefore, it is suggested that the set volumes are changed, as if changed t\it could lead to a disturbance in the other set specifications. Front polarizer is prone to easy scratches and therefore demands special attention. Any water droplets on the screen could lead to discolorations and therefore must be wiped off immediately. CMOS LSI is used in the module and hence static electric problems should be avoided.

The obvious usage of glass in the LQ9D011 module, further mandates careful handling.

Other Active Matrix Liquid Crystal Display Modules include:
M312L2828ET0
LP133X7-H2CC

Friday, February 9, 2007

AD578TD – AN ALL INCLUSIVE 10-12 BIT AD CONVERTER

AD578TD, an analog to digital converter, falls in the category of very fast and complete 10-12 Bit AD converters, as presented by Analog Devices. The complete feature is marked by the converter’s capability to complete the entire task of conversion on its own, without any external requirements, and the fast adjective can be attributed to the fast conversion rate of an AD578TD converter (conversion rate – 3µ). Further the precision thin film scaling resistors on the DAC account for the excellent thermal tracking. The mentioned features of the AD578, mark it as perfect contenders for applications requiring high-speed data acquisition and therefore, high throughput.

The Design Outlay

The AD578TD includes an internal clock, reference and comparator. The high performance and flexibility requirements as catered to by an AD578 converter are managed by the careful placement and utilization of MSI digital and liner ICs with a 10 Bit or a 12 Bit monolithic, monotonic DAC. The stability with time and temperature are managed by the temperature-compensated, buried, Zener reference, which provides the primary voltage reference to the DAC.

The internal clock is preset to a nominal conversion time and adjustments can be made for faster or slower conversion requirements. Short cycles and external clock capabilities are also included for specific cases seeking faster conversion speeds at varying resolutions.

An AD578TD converter is a complete conversion device and you can rely upon for the fastest conversion rates at different resolutions.

Other AD Converters on the market include:

ADC0800 8-Bit AD Converter

LTC1099 - High Speed 8-Bit A/D Converter

AJA HD10A - HDTV 10-bit Analog to Digital Converter