Title :
PLL center-frequency tuning using floating-gates
Author :
Wisland, Dag T. ; Saether, Trond ; Lande, Tor Sverre ; Hovin, Mats
Author_Institution :
Dept. of Inf., Oslo Univ., Norway
Abstract :
This paper presents a novel technique for center-frequency tuning of phase-locked loops (PLL) by exposing the circuit to UV-light. No external biasing is required, and the tuning procedure is automatic due to the feedback in the PLL. The main purpose with the technique is to compensate for process variations in loops with low VCO-gain. A 433 MHz charge-pump PLL has been designed, and measured results are presented
Keywords :
circuit feedback; circuit tuning; phase locked loops; voltage-controlled oscillators; 433 MHz; PLL center-frequency tuning; UV-light exposure; VCO-gain; charge-pump PLL; feedback; floating-gates; process variations; Analog memory; Circuit optimization; Feedback; Frequency conversion; Nonvolatile memory; Phase locked loops; Semiconductor process modeling; Switches; Tuning; Voltage;
Conference_Titel :
ASIC Conference 1998. Proceedings. Eleventh Annual IEEE International
Conference_Location :
Rochester, NY
Print_ISBN :
0-7803-4980-6
DOI :
10.1109/ASIC.1998.722800
