Experimental evaluation of phase-noise and quadrature error in a CMOS 2.4 GHz relaxation oscillator

被引：9
作者：
Oliveira, Luis B. [1 ]
Fernandes, Jorge R. [1 ]
Silva, Manuel M. [1 ]
Filanovsky, I. M. [2 ]
Verhoeven, C. J. M. [3 ]
机构：
[1] INESC ID Lisboa, IS Tecn, Lisbon, Portugal
[2] Univ Alberta, Edmonton, AB T6G 2E1, Canada
[3] Delft Univ Technol, NL-2600 AA Delft, Netherlands
来源：
2007 IEEE INTERNATIONAL SYMPOSIUM ON CIRCUITS AND SYSTEMS, VOLS 1-11 | 2007年
关键词：
D O I：
10.1109/ISCAS.2007.378578
中图分类号：
TP18 [人工智能理论];
学科分类号：
081104 ; 0812 ; 0835 ; 1405 ;
摘要：
Contrary to what happens with LC oscillators, the increase of coupling in cross-coupled relaxation RC-oscillators leads to a lower quadrature error and lower phase-noise. We present a 2.4 GHz CMOS quadrature relaxation oscillator, and show the measurements confirming this property. Increasing the coupling block gain, the oscillator phase-noise is reduced from -97 dBc/Hz to -104 dBcfHz @ 1 MHz. The quadrature error is reduced from 4.3 degrees to 0.8 degrees. These results show that RC quadrature oscillators may be a practical alternative for RF transceiver applications.
引用
收藏
页码：1461 / +
页数：2
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