Title :
Fast-switching adaptive bandwidth frequency synthesizer using a loop filter with switched zero-resistor array
Author :
Thoka, Sreenath ; Geiger, Randall L.
Author_Institution :
Dept. of Electr. & Comput. Eng., Iowa State Univ., Ames, IA, USA
Abstract :
Secondary glitches caused by the switching of bandwidth in adaptive-bandwidth frequency synthesizers, are studied and a simple solution based on stepped-bandwidth switching is proposed to reduce their effects on the switching time of the synthesizer. Behavioral simulations using GSM specifications indicate nearly 35% improvement in switching time using the proposed solution.
Keywords :
cellular radio; frequency synthesizers; phase locked loops; switched filters; GSM specifications; PLL frequency synthesizers; bandwidth switching induced secondary glitches; fast-switching adaptive bandwidth frequency synthesizer; stepped-bandwidth switching; switched zero-resistor array loop filter; synthesizer switching time improvement; Adaptive arrays; Adaptive filters; Bandwidth; Communication switching; Damping; Frequency synthesizers; GSM; Phase locked loops; Voltage; Voltage-controlled oscillators;
Conference_Titel :
Circuits and Systems, 2005. ISCAS 2005. IEEE International Symposium on
Print_ISBN :
0-7803-8834-8
DOI :
10.1109/ISCAS.2005.1465850
