Clock jitter are a big issue in high-speed ADC, here’s an application note from e2V to guide users deals with these problems. Link here (PDF) The e2v converters family addresses the high-speed market in the field of ADCs as well as DACs, with frequencies operating in the GHz range. Such high-speed devices require high-speed clock […]
Tag Archives: app note
App note: Power factor correction using the IRS2500
Drop in replacement power factor correction chip IRS2500 from International Rectifier. Link here (PDF) Many offline applications require power factor correction circuitry in order to minimize transmission line losses and stress on electrical generators and transformers created by high harmonic content and phase shift. Appliances often incorporate switching power supplies (SMPS) which include capacitive filter […]
App note: Auto-zero amplifiers ease the design of high-precision circuits
An application note from Texas Instruments on new chopper amplifers superiority over old design chopper amps. Link here (PDF) This article shows that the auto-zero calibration technique is very different from the chopper technique and is one that, when implemented through modern process technology, allows the economical manufacturing of wideband, high-precision amplifiers with low output […]
App note: Transmitting SXGA video signal through 1kft (300m) CAT-5 cable
An app note from Intersil on utilizing CAT-5 cable for SXGA video transimission. Link here (PDF) The goal of this application note is to present the most current design methods for transmitting high bandwidth SXGA video signal over long distances of CAT-5 cable (300m or more). The enormous cost benefits of CAT-5 cable will also […]
App note: Thermal behavior of small-signal discretes on multilayer PCBs
App note from NXP Semiconductors about multilayer PCB as additional heatsink for flat SMD components mostly power transistors to dissipate heat. Link here (PDF) This application note illustrates how to improve the power dissipation of discrete components by using multilayer PCBs. It focuses on the impact of using larger copper areas to improve the thermal […]
App note: Enhancing cellphone battery performance during GSM pulses through the use of a parallel supercapacitor
Low ESR and ESL supercapacitor paralleled to cellphone batteries can react more quickly to the demanding power required by GSM pulses. A great appnote read from AVX, link here (PDF) With the constant addition of data-intensive features and functionality such as continuous GPS tracking, high-definition media streaming, and the real-time server connections required by mobile […]
App note: Projection with LED light sources
LEDs are now mostly used in light projection systems due to their low power requirements, long life and robustness. Here’s an app note from OSRAM for proper integrations on these projection LEDs. Link here (PDF) This application note provides insights into the use of LED light sources for projection applications. An overview of LED projection […]
App note: Potting protection for outdoor LED video walls and signs
LED signs and large LED video panels are always subjected to harsh environment resulting to corrosion to their pcb mountings, here’s an app note from OSRAM about potting these LED panels for protection. Link here (PDF) This note provides basic information about the potting of flat SMT LEDs in video wall and signage applications. Thereby […]
App note: PointLED® – It’s nice to be different
New SMD LED design from OSRAM ideal for mounting on PCB holes for illumination. Link here (PDF) This application note provides insight into the universally deployable and flexibly mountable light source of the PointLED® product family. A fundamental overview of the LED construction as well as the optical and electrical characteristics and performance of the […]
App note: How to handle a reed switch
Proper handling of reed switches to prolong operation and or storage, an application note from HSI sensing. Link here (PDF) Reed switches consist of two or three metal reed contacts (blades) that are hermetically sealed inside a glass tube. This seal, while strong, may be damaged if proper handling is not used. HSI Sensing has […]
App note: Reed switch operation
Reed switches operation app note from Hermetic Switch Inc. (HSI). Link here (PDF) A reed switch is activated by a magnetic !eld. It’s important to realize that there are numerous possibilities for a switch’s orientation within a given magnetic field. The length of the magnet and the length of the reed switch both affect the […]
App note: Reed switch basics
Application note from Hermetic Switch Inc. (HSI) on simple reed switches. Link here (PDF) A reed switch consists of two or three metal reed contacts (blades) that are hermetically sealed inside a glass tube containing an inert atmosphere. Reed switches come in various sizes, magnetic sensitivities, high power capabilities, high voltage capability, contact configurations, and […]
App note: Design considerations for mixed-signal, How to design a PCB layout
Another application note from e2v, this time about PCB design involving mixed-signal (Analog and Digital) components. Link here (PDF) This application note aims at providing you with some recommendations to achieve improved performance. The initial assumptions are the following: • Proper grounding and routing of all signals is essential to ensure accurate signal conversion • […]
App note: Dithering in analog-to-digital conversion
e2V’s application note about dithering, adding noise to improve the dynamic range of ADCs. Link here (PDF) High-speed ADCs today offer higher dynamic performances and every effort is made to push these state-of-the art performance through design improvements and also through innovative solutions at the system level. For applications where the performance of the high-speed […]
App note: Power MOSFET in high-side operating modes, possible failure modes, and failure signatures
App note from Vishay on high-side MOSFET failures investigation leads to one of the following modes of operation: (a) High-impedance gate drive (b) Electro-static discharge (ESD) exposure (c) Electrical over-stressed (EOS) operation More on it here (PDF) Power MOSFET failures in high-side applications can often be attributed to a high-impedance gate drive creating a virtual […]
App note: Power MOSFET Basics: Understanding the Turn-On Process
More to know about MOSFET gate threshold voltages, an application note from Vishay. Link here (PDF) The question of how to turn on a MOSFET might sound trivial, since ease of switching is a major advantage of field-effect transistors. Unlike bipolar junction transistors, these are majority carrier devices. One does not have to worry about […]
App note: High speed data line protection
Bridge diode works as transient voltage clamp to protect data lines. Here’s Vishay’s app note, link here (PDF) Local Area Network (LAN) data lines require protection against direct and induced transient over voltages on the lines. Protecting these lines and the associated network is not a trivial task. The power range is somewhere between static […]
App note: Temperature dependency of zener voltage
Vishay’s application note on zener diode voltage stability. Link here (PDF) The Zener voltage (VZ) of a Zener or avalanche diode depends on the diode’s junction temperature. Any current running through the p/n junction barrier generates the electrical power of: P = IZ * VZ. This electrical power is equivalent to the thermal power applied […]
App note: Low Value Power Metal Strip Resistors – Intelligent Li-ion rechargeable battery
App note from Vishay about tight tolerances that sense resistor requires for accurate and efficient Li-ion battery chargers. Link here (PDF) Intelligent Li-ion rechargeable batteries utilize current sensing resistors with ultra low ohm, low TCR, tight tolerance, high withstanding surge current and low thermal EMF.
App note: Grid resistors: Determining nominal resistance
App note from Vishay on selecting grid resistors base on their application as resistors vary over continuous duty. Link here (PDF) Nearly all resistor materials change resistance as temperature increases. Depending on the material, this change can range from a few percent to 50 % and higher at 100 % duty on the resistor (100 […]