Title :
A new method for frequency synthesis
Author_Institution :
Allgemeine Elektrotech. und Elektroopt., Ruhr-Univ., Bochum, Germany
Abstract :
A new method for constructing direct digital frequency synthesizers (DDFSs) and phase-locked loops (PLLs) is presented. The DDFSs and PLLs have a high frequency resolution, low spurious noise and high frequency-switching speed. The frequency resolution in μHz-range can be reached and at the same time the spurious noise is kept MHz apart from the carrier. The large spurious-noise-to-carrier distance makes it easy that the amplitude of the spurious noise be strongly attenuated and at the same time a short frequency-switching time of the DDFS and the PLL be kept
Keywords :
frequency synthesizers; phase-locked loops; switching circuits; DDFS; PLL; direct digital frequency synthesizers construction; frequency resolution; high frequency-switching speed; phase-locked loops; spurious noise; spurious-noise-to-carrier distance; Bandwidth; Filters; Frequency modulation; Frequency synthesizers; Hydrogen; Noise level; Phase locked loops; Phase modulation; Phase noise; Signal generators;
Conference_Titel :
Personal, Indoor and Mobile Radio Communications, 1992. Proceedings, PIMRC '92., Third IEEE International Symposium on
Conference_Location :
Boston, MA
Print_ISBN :
0-7803-0841-7
DOI :
10.1109/PIMRC.1992.279844
