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Persistent URL http://purl.org/net/epubs/work/53729
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Record Id 53729
Title A twin frequency modulation technique for retarding field analysers
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Abstract We present here a report on a novel modulation technique for use with retarding field analysers. The more common technique employs a system which uses a high-Q filter to discriminate between unwanted frequency 'f' and a wanted frequency of 2f. For technical reasons it is desirable to lower the Q of this filter. The twin frequency technique can employ frequencies separated by several orders of magnitude thus reducing the required 'Q' of the filter. It also has the advantage that, to a first approximation, it should produce a twofold increase in signal level.
Organisation SRS , SERC
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Language English (EN)
Type Details URI(s) Local file(s) Year
Report DL Technical Reports DL-SCI-TM78E. 1991. DL-SCI-TM78E.pdf 1991