Optical sensor needs no tweaking
02.21.2017 · Circuits
The transfer gain of optical sensors spans a 16-to-1 ratio because of variations in the LED, phototransistor, ambient temperature, and optical path. The wide transfer-gain variation complicates output-resistor selection in dc-coupled circuits. You must size the output resistor to prevent high transfer gains from causing output-stage saturation, but low transfer gains yield low output-voltage swings with low-value resistors...
When to use an amplifier with rail-to-rail inputs - and what to watch out for
02.21.2017 · Articles
Early in my graduate school education, I was working on a project that needed a unity-gain operational-amplifier buffer for a monitoring circuit in our thin film deposition system. As soon as the new module was plugged in, I discovered that all of the signals close to the positive supply were clipped...
Cree Announces the Next Generation of Extreme High Power LEDs
02.21.2017 · News
Cree, Inc. introduces the XLamp® XHP50.2 LED, which delivers up to seven percent more lumens and 10 percent higher lumens-per-watt than the first generation XHP50 LED in the same 5.0 mm × 5.0 mm package...
Smart Power Supply for Microcontroller Projects
A good, reliable and easy to use dc power supply is probably the most important thing for every electronics hobbyists. Since a proper electronically stabilized power supply is crucial for almost all microcontroller-related diy projects, here we are presenting a simple diy project of an easy to build and very affordable power supply for microcontrollers...
Qualcomm Announces First End-to-End 802.11ax Wi-Fi Portfolio
02.20.2017 · News
Qualcomm Technologies, Inc., a subsidiary of Qualcomm Incorporated, announced an end-to-end 802.11ax portfolio, which includes the IPQ8074 system-on-chip for network infrastructure and QCA6290 solution for client devices, making Qualcomm Technologies the first company to announce end-to-end commercial solutions to support 802.11ax...
Circuit Enhancement Enables Digital Setting of Voltage Reference
02.19.2017 · Articles
Adjustable voltage references offer great flexibility to circuit designers because the reference isn’t limited to the manufacturer’s preset values. The adjustable output is typically configured with a voltage divider from the output to the feedback pin. To regulate the output, the circuit compares the voltage at the feedback pin to an internal reference...
Tiny LDOs from STMicroelectronics Deliver Class-Leading Quiet Power for Precision Sensing
02.19.2017 · News
STMicroelectronics’ LDLN025 Low-Dropout voltage regulators deliver best-in-class noise performance in relation to output current and footprint, generating less than 6.5 µVrms noise at 250 mA full load with an outline of just 0.63 mm × 0.63 mm. To ensure high accuracy and sensitivity the LDLN025 is designed to supply ultra-smooth and stable voltage to precision ICs like ADCs, VCOs, or sensors...
Charge-pump topology doubles voltage, breaks DC path
02.16.2017 · Circuits
I once needed a voltage doubler circuit with no DC leakage path between input and output, and ended up devising this unusual 556- (dual 555 timer) based circuit with a "floating" voltage output. Despite some shortcomings, the 555/6 are remarkably versatile chips. Here, I take advantage of the high-current output drivers (>200 mA) in what could be called a push-pull configuration...
Diodes announces 24V/3.5A Power Switch Optimized for the VBUS Line of the Universal USB Type-C Connector
02.16.2017 · News
Diodes Incorporated announces the introduction of the DPS1035. This is a single-channel power switch designed to operate up to 24 V and is optimized for USB Type-C™ & Power Delivery applications which are rapidly becoming universal in many market segments...