-- An open kit for implementing an integrated FPGA-based NMR spectrometer --

Opencore NMR 2, a major version-up, is in preparation.

What do I this for?
-- spirit behind the project --

-- downloadable stuff --

Getting Started -- installation --
-- [ html | pdf ] --

Getting Started -- transmitter and receiver --
-- [ html | pdf ] --

A desktop NMR system using a 1 T permanent magnet

A dual receiver system using a pair of synchronized OPENCORE NMR spectrometers operating with a 9.4 T superconducting magnet and 3.2 mm MAS probe. Shown in the dispays are solid-state 13C and 15N NMR signals acquired simultaneously under 1H decoupling.

Whats new

About the OPENCORE NMR project

Recently I (K.T) have developed an integrated, FPGA-based NMR spectrometer (Rev. Sci. Instrum. 78, 033103 (2007)). Its key feature is to let a single chip of Field-Programmable Gate-Array (FPGA) do all digital jobs required for an NMR spectrometer with core modules written in hardware description language. Here, a kit for implementing the spectrometer inside FPGA is open to public. This kit, referred to as OPENCORE NMR, is composed of core modules such as pulse programmers, direct-digital synthesizers, a digital receiver composed of a digital quadrature demodulator and a digital low-pass filter, and a PC interface. There modules are written in VHDL, and the source codes are to be available, together with peripheral circuit modules as well as a console software. A home-built NMR spectrometer can serve complementary roles to a sophisticated commercial spectrometer, should one comes across such new ideas that require heavy modification to hardware inside the spectrometer. This work can lower the barriar of building a handmade NMR spectrometer in the laboratory, and promote novel and exciting NMR experiments.

  • Please feel free to use the resources here, but all rights are reserved.

  • When the OPENCORE NMR kit is utilized in papers and/or presentations, reference should be given to:
    • K. Takeda, Highly Customized NMR Systems Using an Open-Resource, Home-Built Spectrometer, Annual Reports on NMR Spectroscopy 74 (2011) 355-393; doi:10.1016/B978-0-08-097072-1.00007-8
    • K. Takeda, OPENCORE NMR: Open-source core modules for implementing an integrated FPGA-based NMR spectrometer, J. Magn. Reson. 192, 218-229 (2008).
    • K. Takeda, A highly integrated FPGA-based nuclear magnetic resonance spectrometer, Rev. Sci. Instrum. 78 (2007) 033103.


  • The data are stored in a fully compatible format with TakeNMR, a 1D and 2D NMR-processing freeware written by Prof. K. Takegoshi.

This site is managed by K. Takeda.

Jump to the Takegoshi Lab.