Title :
A digital temperature compensated crystal oscillator using a temperature adaptive capacitor array
Author :
Je, Minkyu ; Gil, Joonho ; Kwak, Jaeyoung ; Yoo, Hoi-Jun ; Shin, Hyungcheol
Author_Institution :
Dept. of Electr. Eng., Korea Adv. Inst. of Sci. & Technol., Taejon, South Korea
Abstract :
We propose a new capacitor array scheme that we call a temperature adaptive capacitor array (TACA) and use it to achieve complete digital trimming of the TCXO at 20 MHz with 0.3 ppm trimming accuracy. The TACA scheme guarantees monotonicity and saves silicon area at the same time. About 10 % reduction in array layout area and about 14 % reduction in the pre-decoding logic area are reported
Keywords :
application specific integrated circuits; arrays; capacitors; circuit simulation; circuit tuning; crystal oscillators; integrated circuit layout; 20 MHz; SPICE simulation; array layout area; digital TCXO; digital trimming; monotonicity; pre-decoding logic area; silicon area; temperature adaptive capacitor array; trimming accuracy; Adaptive arrays; Capacitance; Capacitors; Decoding; Frequency; Logic circuits; Oscillators; Silicon; Switches; Temperature;
Conference_Titel :
VLSI and CAD, 1999. ICVC '99. 6th International Conference on
Conference_Location :
Seoul
Print_ISBN :
0-7803-5727-2
DOI :
10.1109/ICVC.1999.820900
