Title :
Enhanced digital frequency synthesizer and its analysis
Author :
Hikawa, Hiroomi ; Mori, Shinsaku ; Jain, Vijay K.
Author_Institution :
Dept. of Electr. Eng., South Florida Univ., Tampa, FL, USA
Abstract :
A digital frequency synthesizer which uses a phase accumulator as a reference generator is described. An auxiliary phase detector is proposed to remove the low-frequency components which degrade the purity of the output signal in conventional frequency synthesizers. The high reference frequency, which offers a high loop gain and the enhanced characteristics of the phase-frequency detector lead to significantly improved frequency switching. A complete analysis of this digital frequency synthesizer is presented
Keywords :
digital circuits; frequency synthesizers; nonlinear network analysis; auxiliary phase detector; digital frequency synthesizer analysis; frequency switching; loop gain; low-frequency components; phase accumulator; phase-frequency detector; radio communication system; reference generator; signal generators; Bandwidth; Communication switching; Degradation; Frequency conversion; Frequency synthesizers; Phase detection; Phase frequency detector; Phase locked loops; Signal resolution; Voltage-controlled oscillators;
Conference_Titel :
Circuits and Systems, 1990., IEEE International Symposium on
Conference_Location :
New Orleans, LA
DOI :
10.1109/ISCAS.1990.112141
