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App note: General overview of IR transmission in free ambient

Sunday, September 25th, 2016

Vishay's general information about IR transmission in free ambient. Link here (PDF) Free ambient IR data transmission, IR remote control as well as most opto-electronic sensors and light barrier systems work with an optical wavelength between 870 nm and 950 nm. The emitter and detector components are highly efficient in...

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App note: Using Vishay infrared receivers in a Wi-Fi environment

Sunday, September 25th, 2016

2.4Ghz and 5 Ghz Wi-fi signals can sometimes affect IR receivers, here's Vishay's app note about them. Link here (PDF) In recent years, Wi-Fi connectivity has penetrated most consumer electronic devices used for media reproduction. New TVs, satellite receiver and cable boxes, and streaming devices are more often than not...

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App note: High-speed level shifting using Si8XXX isolators

Sunday, September 18th, 2016

Silicon Lab's Si86xx which provides digital isolation and voltage level shifting while Si823x as ISOdrivers, Link here (PDF) Voltage level shifting is common in analog and mixed-signal system applications. While several technologies implement level shifting (e.g., HVIC processes, discrete circuits, dedicated level shifting ICs), recent advances in CMOS isolation technology...

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App note: Novel current-sense measurement with automatic offset correction

Sunday, September 18th, 2016

Silicon Labs' application note about a low power current measurement circuit using TS1001 nano power op-amp paired with low-power CY8C38 microcontroller, Link here (PDF) Pairing a simple circuit using nanopower analog op amps with a microcontroller can monitor single battery cells and solar harvesters. Pairing up a 0.65 V/1 µA...

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App note: USB field firmware updates on MSP430 MCUs

Saturday, September 17th, 2016

TI's application note: USB field firmware updates on MSP430 MCUs (PDF!) With the advent of USB, end users can perform firmware upgrades in the field by simply attaching the device via USB and executing an application on the host PC. Such an approach has numerous advantages: Problems discovered after product...

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App note: Class D audio amplifier basics

Sunday, September 11th, 2016

Class D audio amplifier an efficient amplifier by Infineon Technologies, Link here A Class D audio amplifier is basically a switching amplifier or PWM amplifier. There are a number of different classes of amplifiers. This application note takes a look at the definitions for the main classifications.

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App note: How to pick a click-and-pop suppressor

Sunday, September 11th, 2016

Audio noises click-and-pop suppression method from Maxim. Link here (PDF) This application note presents the MAX9890 and MAX9892 which use different approaches to remove audible click and pop from headphones. Each device is uniquely suited to different applications.

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App note Quick-Start: Driving 14-segment displays with the MAX6954

Saturday, September 10th, 2016

Guidelines from Maxim on using the MAX6954 to drive 14-segment monocolor LEDs, app note here (PDF!): This article is how-to guide, intended as a quick learning aid for engineers considering using the MAX6954 to drive 14-segment monocolor LEDs. The MAX6954 is a versatile display driver, capable of controlling a mix of...

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App note: Using Cymbet™ EnerChip™ batteries instead of coin cells and super capacitors

Sunday, September 4th, 2016

High charge/discharge cycle and solid state reliability EnerChip from Cymbet make this a good replacement for super caps and coin cell backup batteries. Link here (PDF) Primary and secondary (i.e., rechargeable) coin cell batteries, as well as super capacitors, have been in use for years as auxiliary power sources for...

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App note: Battery fuel gauge IC (LC709203F) for 1-Cell Lithium-ion (Li+)

Sunday, September 4th, 2016

Lithium-ion fuel gauge IC from ON Semiconductors. Link here (PDF) The LC709203F is an IC that measures the remaining power level of 1-cell lithium-ion (Li+) batteries used for portable equipment etc. This product reduces fuel gauge errors with a unique correction technology during measurement of battery temperature and voltage. This...

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App note: Crystal oscillator basics and crystal selection for rfPICTM and PICmicro devices

Sunday, September 4th, 2016

The basics of crystals and crystal oscillators application note from Microchip, link here (PDF!) This Application Note will not make you into an oscillator designer. It will only explain the operation of an oscillator in simplified terms in an effort to convey the concepts that make an oscillator work. The goal...

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App note: Snubber capacitors for complete insurance of power semiconductors

Sunday, August 28th, 2016

An application note from WIMA about snubber capacitors, Link here. The trend of modern semiconductor technology towards increasingly powerful applications results in the fact that switched currents and voltage levels are continuously increased and that simultaneously the switching speed is also increasing markedly. The developments in the area of power...

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App note: Selection of capacitors for pulse applications

Sunday, August 28th, 2016

Guidelines from WIMA about selecting capactiors for pulsed conditions. Link here The maximum permissible AC voltage that can be applied to capacitors in sinusoidal waveform applications, can be determined from the graphs in the respective capacitor ranges. However, where pulse conditions exists, the following procedure is to be observed to...

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App note: Measuring a loudspeaker impedance profile using the AD5933

Sunday, August 21st, 2016

An application note from Analog Devices about AD5933, this provides a low cost substitute to expensive test equipment like signal generators, oscilloscope and voltmeters in getting the speaker's impedance profile. Link here (PDF) This application note describes a circuit architecture using the AD5933 that allows the system designer to measure...

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App note: Choosing the appropriate component from data sheet ratings & characteristics.

Sunday, August 21st, 2016

Chossing the right power semiconductor for an application, a technical note from IXYS. Link here This application note is intended to show how to choose the appropriate rating of a power semiconductor component for a known application using the specifications given in the datasheet. The explanations have been kept sufficiently...

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App note: Designing for board level electromagnetic compatibility

Saturday, August 20th, 2016

Designing for board level electromagnetic compatibility application note (PDF!) from NXP: Electromagnetic interference (EMI) is a major problem in modern electronic circuits. To overcome the interference, the designer has to either remove the source of the interference, or protect the circuit being affected. The ultimate goal is to have the circuit board operating...

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App note: Voltage to current conversion

Sunday, August 14th, 2016

Using Apex Microtechnology's power op amps for voltage controlled current sources (VCCS's) application note, Link here (PDF) Voltage controlled current sources (or VCCS’s) can be useful for applications such as active loads for use in component testing or torque control for motors. Torque control is simplified since torque is a...

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App note: Programmable power supplies

Sunday, August 14th, 2016

Apex Microtechnology's application note about programmable power supplies. Link here (PDF) The programmable power supply (PPS) is not only a key element in automated test equipment, but it is also used in fields as diverse as industrial controls, scientific research and vehicular controls. When coupled to a computer, it bridges...

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App note: Interfacing an I2S device to an MSP430 device

Saturday, August 13th, 2016

Interfacing an I2S device to an MSP430 device application note (PDF!) from Texas Instruments: The MSP430 series of microprocessors are fast powerful devices ideally suited for use with the various wireless transceivers offered by Texas Instruments. In streaming audio applications, however, it is desirable that the microprocessor support an audio bus to allow...

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App note: Wear leveling in NAND flash memory

Sunday, August 7th, 2016

Application note/Technical note from Macronix on extending the maximum endurance limit of NAND flash memories by wear leveling. Link here (PDF) NAND flash memory is widely used in today’s embedded systems for code and data storage applications. Some applications are required to perform numerous Program and Erase operations on the...

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