An astable multivibrator formed by a novel NDRHBT

Pingjuan Niu; Weilian Guo; Xin Yu; Xiaoyun Li; Shilin Zhang; Haitao Qi; Changyun Miao; Xiaoli Wang; Wei Wang

doi:10.1117/12.755007

21 December 2007 An astable multivibrator formed by a novel NDRHBT

Pingjuan Niu, Weilian Guo, Xin Yu, Xiaoyun Li, Shilin Zhang, Haitao Qi, Changyun Miao, Xiaoli Wang, Wei Wang

Proceedings Volume 6798, Microelectronics: Design, Technology, and Packaging III; 679813 (2007) https://doi.org/10.1117/12.755007
Event: SPIE Microelectronics, MEMS, and Nanotechnology, 2007, Canberra, ACT, Australia

Abstract

The earlier astable multivibrator formed by silicon tunnel diode has the disadvantage of low speed and non-modulation. NDRHBT is a novel type of HBT with NDR characteristics and high speed. Its NDR characteristics can be modulated by the base voltage V_BE or base current I_B. So the astable multivibrator formed by NDRHBT has the advantage of high speed, high frequency, bistability, and frequency modulation by V_BE or I_B. Thus, it can be applied widely in high frequency oscillation circuits and high speed-digital circuits. In this paper, it is demonstrated that the frequency of the astable multivibrator can be modulated by base voltage V_BE. The experimental result shows that the frequency of time interval between two adjacent pulses f₁ varies from 7×10⁴Hz down to 2.5×10⁴Hz as V_BE changes from 4.5V to 6.5V and exhibits near a linear relationship. So it is can be used as an efficient voltage controlled frequency modulator for pulse signal in high speed digital circuits.

Citation Download Citation

Pingjuan Niu, Weilian Guo, Xin Yu, Xiaoyun Li, Shilin Zhang, Haitao Qi, Changyun Miao, Xiaoli Wang, and Wei Wang "An astable multivibrator formed by a novel NDRHBT", Proc. SPIE 6798, Microelectronics: Design, Technology, and Packaging III, 679813 (21 December 2007); https://doi.org/10.1117/12.755007

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