Title: Direct digital frequency synthesizer of shaped frequency noise
Application Number: 200510117175 Application Date: 2005.11.01
Publication Number: 1960182 Publication Date: 2007.05.09
Approval Pub. Date: Granted Pub. Date:
International Classifi-cation: H03L7/00;H03B28/00
Applicant(s) Name: Inst of Semiconductors, C.A.S Address:
Inventor(s) Name: Ni Weining;Shi Yin
Attorney & Agent: duancheng yun
Abstract:
    The invention relates to a frequency noise reforming direct digital frequency synthesizer, which can raise the dynamic feature of the output signal. It consists of the frequency reformer inner-inserter, the phase accumulator, and the sine or cosine inquiry table (SCIT), the D/A converter and the low-pass filter. The output of the reformer connects to the accumulator to complete accumulation. The accumulator produces the related phase value, which is sent to SCIT. The output of SCIT goes through the D/A converter and the low-pass filter. The final output is a low noise sine or cosine wave.
Time: 10
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