Low-output-impedance BiCMOS voltage buffer

IEICE Electronics Express

Yves Martens¹  Johan Bauwelinck¹  Peter Ossieur¹  Wei Chen¹  Dieter Verhulst¹  Jan Vandewege¹  Xing-Zhi Qiu¹ 

[1] Ghent University, INTEC/IMEC

关键词: Voltage buffer;    output impedance;    BiCMOS;   

DOI  :  10.1587/elex.1.34

学科分类：电子、光学、磁材料

来源: Denshi Jouhou Tsuushin Gakkai

【 摘 要 】

References(3)Cited-By(2)A low power, 3.3V BiCMOS voltage buffer is presented showing gigahertz operation, low output impedance and low input current. The buffer is designed to make the voltage at an unused negative output of a current switching DAC equal to the voltage of the positive current output, thus increasing the switching speed of the DAC. By consequence the buffer has to sink a fast switching current. A super emitter follower is used for achieving the low output impedance whereas base current compensation is used to reduce the input current. Simulation results in a 0.35µm SiGe BiCMOS process are included demonstrating a low output impedance, a small input current, a high 3dB bandwidth and a good transient response at 330µW static dissipation.

【 授权许可】

Unknown