Summary
International Technical Conference on Circuits/Systems, Computers and Communications
2016
Session Number:P2
Session:
Number:P2-2
An Ultra-Low Power and High Resolution Digitally Controlled Oscillator with Gain Estimation Technique for Direct Modulation
Seong-Jin Oh, Hamed Abbasizadeh, Sang-Sun Yoo, Kang-Yoon Lee ,
pp.923-924
Publication Date:2016/7/10
Online ISSN:2188-5079
Summary:
This paper presents an ultra-low power and high resolution Digitally Controlled Oscillator (DCO) with gain estimation technique for direct modulation. Three capacitor banks and Delta Sigma Modulator (DSM) are adopted for ultra-high resolution and for the low current consumption, 0.7 V of supply voltage is adopted. Gain estimation technique is adopted for direct modulation. The proposed DCO is designed and fabricated using 55 nm CMOS process and its oscillation Frequency is 4.8 GHz. 1-bit resolution of MSB, LSB, and Fine cap banks are 81.92 MHz, 5.12 MHz, 153.6 kHz, respectively, the nominal phase noise at 1 MHz offset is -116.28 dBc/Hz, and the current consumption is 850 uA when 0.7 V VDD is supplied.