DocumentCode :
3541364
Title :
A digitally programmable on-chip RC-oscillator in 0.25 μm CMOS logic process
Author :
Ghidini, C. ; Aranda, J.G. ; Gerna, D. ; Kelliher, K. ; Baumhof, Christoph
Author_Institution :
NewLogic Technol., Lustenau, Austria
fYear :
2005
fDate :
23-26 May 2005
Firstpage :
400
Abstract :
The design of a process compensated RC on-chip oscillator with internally generated current and voltage references is presented. The oscillator provides a selectable clock (30 MHz to 36 MHz) with digital trimming to minimize process variations (±45% in resistance value and ±15% in capacitance value). After fine-tuning, the oscillator guarantees less than ±2% frequency variation from 0 to 80 degrees, when operating down to 2 V. A 5-bit programmable fringe capacitor array was custom designed and modeled to overcome the lack of reliable capacitance devices in logic processes. The module was implemented in a 0.25 μm CMOS logic process, occupies an area of 444×280 μm2 (bandgap excluded) and requires no external reference or components.
Keywords :
CMOS integrated circuits; RC circuits; integrated circuit design; logic design; minimisation; mixed analogue-digital integrated circuits; nonlinear network synthesis; oscillators; reference circuits; 0.25 micron; 280 micron; 30 to 36 MHz; 444 micron; CMOS logic process; current reference; digital trimming; digitally programmable on-chip RC-oscillator; frequency variation; process compensated RC on-chip oscillator; programmable fringe capacitor array; selectable clock; voltage reference; CMOS logic circuits; CMOS process; Capacitance; Capacitors; Clocks; Frequency; Logic devices; Process design; Programmable logic arrays; Voltage-controlled oscillators;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Circuits and Systems, 2005. ISCAS 2005. IEEE International Symposium on
Print_ISBN :
0-7803-8834-8
Type :
conf
DOI :
10.1109/ISCAS.2005.1464609
Filename :
1464609
Link To Document :
بازگشت