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Posts Tagged ‘app note’

App note: How RF transformers work and how they are measured

Sunday, August 20th, 2017

Application note from Mini-Circuits about transformers, this time the RF transformers. Link here (PDF) RF transformers are widely used in electronic circuits for * Impedance matching to achieve maximum power transfer and to suppress undesired signal reflection. * Voltage, current step-up or step-down. * DC isolation between circuits while affording...

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App note: Transformers

Sunday, August 20th, 2017

App note from Mini-Circuits on transformer types and some basics of them. Link here (PDF) The purpose of this application note is to describe the fundamentals of RF and microwave transformers and to provide guidelines to users in selecting proper transformer to suit their applications. It is limited to core-and-wire...

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App note: Selecting a FET for use with the Si875x driver

Sunday, August 13th, 2017

Another application note from Silicon Labs on determining the proper FET used on their Si875x driver based on its application. Link here (PDF) The Si875x enables creating custom solid state relay (SSR) configurations. Supporting customer-selected external FETs, the Si875x combines robust isolation technology with a FET driver to form a...

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App note: Driving MOSFET and IGBT switches using the Si828x

Sunday, August 13th, 2017

App note from Silicon Labs on their MOSFET and IGBT driver Si828x and how to determining its external components to achieve optimized performance. Link here (PDF) The Si828x products integrate isolation, gate drivers, fault detection protection, and operational indicators into one package to drive IGBTs and MOSFETs as well as...

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App note: Gate drive characteristics and requirements for HEXFET power MOSFETs

Sunday, August 6th, 2017

App note from International Rectifier on driving their Power MOSFETs. Link here (PDF) The conventional bipolar transistor is a current-driven device. A current must be applied between the base and emitter terminals to produce a flow of current in the collector. The amount of a drive required to produce a...

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App note: Microcontroller Clock – crystal, resonator, RC Oscillator, or silicon oscillator?

Sunday, August 6th, 2017

App note from Maxim Integrated on clock sources of microcontrollers and their strengths and weaknesses. Link here The majority of clock sources for microcontrollers can be grouped into two types: those based on mechanical resonant devices, such as crystals and ceramic resonators, and those based on electrical phase-shift circuits such...

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App note: Quartz crystal oscillators

Sunday, July 30th, 2017

App note from Abracon Corporation on quartz crystal oscillators. Link here (PDF)

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App note: Quartz crystals

Sunday, July 30th, 2017

App note from Abracon Corporation about choosing the right crystal for you application. Link here (PDF)

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App note: Clearing Xilinx FPGA configuration to allow boundary scan testing

Sunday, July 23rd, 2017

Another application note from XJTAG on preparing Xilinx FPGA for proper boundary scan testing. Link here When Xilinx FPGAs are configured it can restrict the boundary scan access to some signals on the device. One work-around for this problem is to configure the FPGA with a ‘blank’ image that closely...

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App note: Using a test reset section to initialise JTAG devices

Sunday, July 23rd, 2017

An app note from XJTAG about applying test reset to put some devices to JTAG compliant mode. Link here Some JTAG devices require a specific sequence of states to be applied to some signals in order to put the device into a JTAG-compliant mode. This application note describes how a...

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App note: Linear power MOSFETS basic and applications

Sunday, July 16th, 2017

Some examples of power MOSFETS application from this app note from IXYS Corporation. Link here (PDF) Applications like electronic loads, linear regulators or Class A amplifiers operate in the linear region of the Power MOSFET, which requires high power dissipation capability and extended Forward Bias Safe Operating Area (FBSOA) characteristics....

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App note: Depletion-Mode power MOSFETs and applications

Sunday, July 16th, 2017

IXYS Corporation's N-Channel power MOSFET selection and application. Link here (PDF) Applications like constant current sources, solid-state relays, telecom switches and high voltage DC lines in power systems require N-channel Depletion-mode power MOSFET that operates as a normally “on” switch when the gate-to-source voltage is zero (VGS=0V). This paper will...

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App note: Infrared (IR) Spectroscopy with the SFH 473X – Background & technology

Sunday, July 9th, 2017

Infrared spectroscopy by OSRAM and their SFH 473X broadband light emitters. Link here (PDF) Imagine you can check if the mangos on the market are sweet - without even touching them… Imagine you can verify if your prescribed medical tablets contain the life-saving compound – or if they are counterfeits…...

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App note: Ambient light sensors – General application note

Sunday, July 9th, 2017

Different ambient sensors differs on their ability to sense specific wavelength and introduce different ambient levels compared to human eye, here's a general application note from OSRAM. Link here (PDF) This application note introduces discusses ambient light sensing. The different types of ambient light sensors are described and related to...

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App note: USB Type C, CC Pin design considerations, high voltage design considerations for Type-C connector pins in systems supporting non-USB standard charging protocol and/or fault cases

Sunday, July 2nd, 2017

Another app note from Fairchild Semiconductors on USB Type C to USB legacy design considerations. Link here (PDF) When designing hardware systems with type C connectors, a designer also has to consider all legacy, standard, and nonstandard specifications that exist in the USB connector eco system. With the introduction of...

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App note: USB Type-C design considerations, USB Type-C adapters

Sunday, July 2nd, 2017

Type-C USB cable adapter design consideration app note from Fairchild Semiconductors. Link here (PDF) USB is a ubiquitous connector that is used by many customers and in many different applications. With the official release of the USB Type-C connector, many companies are racing to implement this new connector and the...

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App note: HT45F3630 power tool speed control switch application example

Sunday, June 25th, 2017

All in one motor control MCU HT45F3630 from Holtek. Link here (PDF) Aimed at the motor speed control product application area, HOLTEK has developed the HT45F3630, which is commonly used in electric drills, electric screwdrivers, lawn mowers and other similar product applications. This MCU provides a group of PWM high...

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App note: How to measure thermal resistance of LED emitters and LED arrays

Sunday, June 18th, 2017

Another white paper from Lumileds about LED thermal resistance. Link here (PDF) Thermal performance is the most critical factor of a well-designed LED lighting system. A lighting system with proper thermal design has higher efficacy, meaning more light can be extracted using less energy, and better long term reliability.

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App note: Flash for “Selfies”

Sunday, June 18th, 2017

Effective front facing camera flash discussed in this white paper from Lumileds. Link here (PDF) Smartphones are ubiquitous in everybody’s daily lives, a trend that shows no sign of slowing. A key component of the smartphone is the camera, which has gained market share over Digital Still Cameras due to...

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App note: DAC ICs: How many bits is enough?

Sunday, June 11th, 2017

A very old application notes from Analog Devices that tells about Nyquist Theorem, sampling rate and quantization used on DACs. Link here (PDF) At the heart of every digital audio playback system lies the single-most critical component for high-fidelity audio: the digital-to-analog converter (DAC). These converters handle the delicate task...

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