DIGITAL SMALL-SIZED USB OSCILLOGRAPH Russian patent published in 2010 - IPC G01R19/00 

FIELD: instrument making.

SUBSTANCE: digital small-sized USB oscillograph comprises inlet circuit and analog-digital converter. Additionally it comprises body, probe needle, USB cable, grounding cable, two-colour light diode, multifunctional button, inlet buffer amplifier, attenuator, source of reference voltage, summator, unit of supply voltage stabilisation, amplifier, digital-analog converter, DC/DC converter, low-pass filter, USB controller. The first outlet of controller is connected to outlet of analog-digital converter. At the same time inlet of inlet buffer amplifier is connected to outlet of inlet circuit, and outlet - to the first (analog) inlet of attenuator, the second (digital) inlet of which is connected to the second outlet of controller. Outlet of summator is connected to inlet of amplifier, outlet of which is connected to inlet of low-pass filter. At the same time inlet of summator is connected to outlet of reference voltage source. The third inlet of summator is connected to outlet of digital-analog converter. The fourth and fifth outlets of controller are connected to two-colour light diode. The sixth outlet of controller is connected to the second outlet of inlet circuit, and the second inlet of controller is connected to multifunctional button.

EFFECT: improved information value of signal parametres.

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