DEVELOPMENTS AT NIST Researchers at the National Institute of Standards and Technology (NIST) have developed a number of new devices and methods involving a variety of technologies. In certain cases, other parties have participated in the development of these technologies. NIST may enter into a Cooperative Research and Development Agreement (CRADA) with interested parties to perform further research on the invention for purposes of commercialization. NIST may grant CRADA Partners an option to negotiate for exclusive licenses to any jointly owned inventions which arise from the CRADA as well as an option to negotiate for exclusive royalty-bearing licenses for NIST employee inventions which arise from the CRADA. Anyone interested in the further development of any of these technologies or in applying for a license to commercialize these technologies shall send a written request for further information, referencing the NIST Docket Number and Title, to: National Institute of Standards and Technology, Office of Technology Partnerships, Building 820, Room 213, Gaithersburg, Maryland 20899, Telecopy: 301-869-2751. This is not an announcement of a contract action or a grant. NIST DOCKET NUMBER: 98-026PA, Title: Bipolar Waveform Generation in Josephson Digital-to-Analog Converters, Description: An accurate bipolar voltage source for ac and dc metrology, based on the quantized pulses of Josephson junctions has been developed. The output voltage is a factor of 4 to 6 higher than the amplitude of previous unipolar waveforms; this is achieved by generating bipolar waveforms where arrays of junctions are biased with both a broadband two-level digital code and a sinusoidal frequency. Bipolar kilohertz frequency waveforms have been demonstrated with peak amplitude up to plus or minus 18 mV and quantization noise power 10 orders of magnitude below the fundamental frequency. WEB: NIST Contracts Homepage, http://www.nist.gov/admin/od/contract/contract.htm. E-MAIL: NIST Contracts Office, Contract@nist.gov. Posted 06/10/99 (W-SN341269).

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