Simple negative resistance oscillators

Normally -according to the Ohm's law- when the applied voltage is increasing, the current is increasing too, however some components can break this law. When the voltage increases, current decreases. This is called negative resistance. One of the most know element that exhibits this behavior is a tunnel diode. Once very promising, today it isn't widely used in popular designs and occupies a niche in microwa ...

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High-performance scope probes top out at 20 GHz

BEAVERTON, Ore., March 15, 2016 /PRNewswire/ -- Tektronix, Inc., the world's leading manufacturer of oscilloscopes, today introduced the P7700 series of TriMode™ probes for use with Tektronix performance oscilloscopes. Offering up to 20 GHz bandwidth, the new probes ease the challenges designers face when debugging circuits found in the latest mobile and enterprise designs by minimizing probe loading, impro ...

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Measure small LCs with a scope

One of our technicians recently asked for help determining the value of an SMT inductor. It was unmarked, and was many turns of very fine wire on a ferrite core. The resistance measured 26Ω, which for some reason gave our ancient LCR bridge a conniption, and read 30mH along with a blinking error message. The tech rightfully felt that such a small inductor could not possibly be 30mH. I didn't have another br ...

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Miniscope v2f

Extremely cheap low-speed PC/USB oscilloscope with STM32 (STM32F042) microcontroller - variant of miniscope v2e with input amplifier (MCP6S21 PGA) added. This is minor update, but input PGA fixes problem with input leakage of STM32F042 allowing increasing input impedance at the same time. Quick specification follows miniscope v2a-d idea: very simple device streaming data in real time to PC; DLL and GUI (Win ...

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Miniscope v2e

Extremely cheap low-speed PC/USB oscilloscope with STM32 (STM32F042) microcontroller. Quick specification follows miniscope v2a-d idea: very simple device streaming data in real time to PC; DLL and GUI (Win32) are handling all the functionality, sampling: 480 kSps, 8 bit, single voltage range, streaming via USB FS with libusb (32/64bit) used as driver, record length: 4k to 1M defined in DLL; up to 512M samp ...

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Edison-Scope

Edison-Scope, is an Intel Edison controlled 200 Msa/S mixed signal oscilloscope. It provides an Operating System agnostic method to control the MSO-28 oscilloscope. By leveraging the web browser on the modern smart devices, one can control USB based hardware traditionally requires a desktop OS. Conceptually this project is very similar to the PiMSO project, but the similarity exist only on the client side. ...

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