JanasCard



Custom development

        We offer custom design and production of electronic equipment. Our firm has a rich experience with design of precise analogue electronics, especially ultra-low noise amplifiers with noise deeply below 1 nV/sqrtHz, ultra-low distortion circuits and oscillators with THD below 140 dB, high resolution AD and DA converters with resolution up 26 bits together with digital and microprocessor technology from 8-bit 8051 to 32-bit ARM processors. We are able to develop Ethernet or USB DAQ modules or data loggers with SD cards with capacity up 32 Gbyte.

Examples of realised designs

  • A system for special chord resonant strain gauges for Nuclear power plant Temelin. The system provides local or remote control via RS485 and consists of a measurement unit and 5 relay MUXes with a total capacity of 320 sensors. The system runs on both blocks since 2000.
temelin.jpg (25736 bytes)

 

  • CMS1 - complete DAQ and control system 16-bit DA, 16-bit AD, lock-in amplifier controlled over galvanically isolated USB for Weizmann institute of science, Israel for research of single atom contacts.
CMS1.jpg

 

  • LNVS1 - 4 channel voltage source consists from 2 x 26-bit DACs with linearity below 1 ppm and noise below 0.1 ppm and 2 independent and galvanically isolated 16-bit DACs controlled over galvanically isolated USB for Weizmann institute of science, Israel.
LNVS1.jpg

 

  • DF100 - ultra-low noise FET differential amplifier with noise density below 1 nV/sqrtHz for Weizmann institute of science, Israel for research of single atom contacts. A detailed description of ultra-low noise amplifiers is here.

DF100.jpg (144820 bytes)

 

  • IVAMP1 - I/V amplifier- a simplified replacement of SR570 or DLPCA-200 with an improved specification, especially significantly lower voltage noise, for Weizmann institute of science, Israel for research of single atom contacts. A detailed description of transimpedance amplifiers is here.

IVAMP1.jpg

 

  • Low noise I/V amplifier with a built-in photodetector for Ben-Gurion University Israel. A detailed description of transimpedance amplifiers is here.

ComIVamp.jpg

 

  • Ultra-low noise dual channel differential amplifier and a bandpass filter with noise 1 nV/sqrtHz - replacement for SR560 with 4 times lower noise for Department of measurement of Czech Technical University Prague. A detailed description of ultra-low noise amplifiers is here.

Lamplifier.jpg (62735 bytes)

 

  • Excitation and evaluation electronics for scanning thermal microscope for Czech metrological institute Brno.
TSCAN.jpg

 

  • Ultra-low distortion oscillators for calibration purposes in a range 10 Hz to 2 MHz with THD -140 dB (2kHz) -120 dB (50 kHz) to -100 dB (2 MHz) for Czech Technical University Prague. A detailed description is here. The oscillator together with a notch is available in form of the populated PCB with frequency upon request. There are also available unpopulated PCBs for DIY.

oscilator.jpg (89627 bytes)

 

  • High-performance data logger for seismic events with dynamic range 140 dB, low power 100 mW, data storage on SD cards, GPS time synchronisation.

gaia.jpg (89627 bytes)

gaia1.jpg (89627 bytes)

 

  • Different USB modules - USB module with 60 digital inputs/outputs

usbdio.jpg (67074 bytes)

  • USB module for distance measurements with LVDT sensors with drivers for Windows/LINUX

usblvdt.jpg (46415 bytes)

  • An analogue part of an instrument for medical experiments - oscillator+sync. detector with noise density 0.6nV/sqrtHz in cooperation with Department of measurement CTU Prague for a customer from Oklahoma, USA.
  • 8 channel strain gauge amplifier and AD converter with uP for testing of railway vehicles

tenzoz.jpg (39487 bytes)

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