An astable multivibrator formed by a novel NDRHBT - art. no. 679813

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

来源：Conference on Microelectronics - Design, Technology and Packaging III, 2007-12-05 to 2007-12-07.

• NDR
• HBT
• astable multivibrator
• ultra-thin base structure
• frequency modulation
• GaAs-based

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 f(1) varies from 7 x 10(4) Hz down to 2.5 x 10(4) Hz as VBE 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.

• 出版日期2008
• 单位天津工业大学