Return to search

An ISM-Band Frequency Synthesizer with Closed-Loop GFSK Modulation

An ISM-band frequency synthesizer is introduced in this thesis. The technique allows digital phase/frequency modulation to be achieved in a closed phase locked loop (PLL) without mixers and D/As. According to the simulation results using ADS, quantization noise will be filtered by the PLL bandwidth. But the data rate is also bounded by the PLL bandwidth. Two key components of this closed-loop architecture, Gaussian filter and delta-sigma modulator have been implemented by FPGA together with the Qualcomm Q3236 synthesizer IC.

Identiferoai:union.ndltd.org:NSYSU/oai:NSYSU:etd-0704101-225111
Date04 July 2001
CreatorsChen, Hsing-Hung
ContributorsSheng-Fuh Chang, Tzong-Lin Wu, Huey-Ru Chuang, Tzyy-Sheng Horng
PublisherNSYSU
Source SetsNSYSU Electronic Thesis and Dissertation Archive
LanguageCholon
Detected LanguageEnglish
Typetext
Formatapplication/pdf
Sourcehttp://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0704101-225111
Rightsunrestricted, Copyright information available at source archive

Page generated in 0.0013 seconds