DocumentCode :
2524585
Title :
An active guarding circuit for giga-hertz substrate noise suppression
Author :
Chao, Hao-Ming ; Wang, Chien-Lung ; Wuen, Wen-Shen ; Wen, Kuei-Ann
Author_Institution :
Nat. Chiao Tung Univ, Hsinchu
fYear :
2007
fDate :
8-10 Oct. 2007
Firstpage :
119
Lastpage :
122
Abstract :
This paper presents an active guarding circuit employing noise decoupling and inversion feedback for substrate noise suppression in high frequency up to GHz. Proposed inversion feedback circuit can efficiently suppress substrate noise up to GHz range by introducing a zero within an amplitude controller. The noise decoupling circuit not only provides a decoupling path, but also senses the noise level for the amplitude controller to perform noise cancellation. By applying the proposed active guarding circuit, the noise suppression of passive guard ring can be improved more than 14dB in the frequency range from DC to 1 GHz and 7.2 dB up to 5G Hz. For 1 dB degradation of noise suppression performance, the input noise level can be up to 90 mV at 1 MHz and 86 mV at 1 GHz, respectively.
Keywords :
active networks; noise abatement; active guarding circuit; inversion feedback; noise cancellation; noise decoupling; passive guard ring; substrate noise suppression; Active noise reduction; Analog circuits; Bandwidth; Circuit noise; Coupling circuits; Degradation; Feedback circuits; Frequency; Noise cancellation; Noise level;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Microwave Integrated Circuit Conference, 2007. EuMIC 2007. European
Conference_Location :
Munich
Print_ISBN :
978-2-87487-002-6
Type :
conf
DOI :
10.1109/EMICC.2007.4412662
Filename :
4412662
Link To Document :
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