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http://dx.doi.org/10.7471/ikeee.2021.25.4.721

UWB impulse generator using gated ring oscillator  

Jang, Junyoung (BIT Micro FAB Research Center, Yonsei University)
Kim, Taewook (Dept. of Electrical & Electronics Engineering, Yonsei University)
Publication Information
Journal of IKEEE / v.25, no.4, 2021 , pp. 721-727 More about this Journal
Abstract
This paper proposes a UWB (Ultar-wideband) impulse generator using the gated ring oscillator. The oscillator and PLL circuits which generate a several GHz LO signal for the conventional architecture are replaced with the gated ring oscillator. Therefore, the system complexity is decreased. The proposed architecture controls the duty of enable signal, which is used for the head switch of ring oscillator. The control of the duty enables to tun off the oscillator during the guard interval and stop wasting the power consumption. The pulse shaping method using the counter makes the small side lobe and preserves the bandwidth regardless of the change on the center frequency. Designed UWB impulse generator could change the center frequency from 6.0 GHz to 8.8 GHz with a digital bit control, while it preserves the bandwidth as about 1.5 GHz.
Keywords
UWB; impulse signal; gated ring oscillator; digital transmitter; pulse shaping;
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