A CMOS integrated low-power, ultra-low-frequency relaxation oscillator for neuromorphic applications

Publikationstyp
Conference Paper
Date Issued
2021-08
Sprache
English
Author(s)
Cheng, Xiaoyan  
Birkoben, Tom  
Kohlstedt, Hermann  
Bahr, Andreas  
TORE-URI
http://hdl.handle.net/11420/12313
Volume
2021-August
Start Page
170
End Page
174
Citation
Midwest Symposium on Circuits and Systems (MWSCAS 2021)
Contribution to Conference
Midwest Symposium on Circuits and Systems (MWSCAS 2021)  
Publisher DOI
10.1109/MWSCAS47672.2021.9531896
Scopus ID
2-s2.0-85115649495
In the emulation of dynamic activities of neurons, relaxation oscillator plays a decisive role in the form of frequency coding and frequency synchronization. This paper presents a programmable ultra-low-frequency relaxation oscillator for neuromorphic network applications. The oscillator adopts a 250 pA charging current to achieve ultra-low oscillation frequency and utilizes a subthreshold-region current mirror to realize negative differential resistance. The frequency of the proposed oscillator is configurable from 3.15 Hz to 81.30 Hz. The power consumption of a single oscillator is 24 nW with an area occupation of 0.05546 mm2. The design is fabricated in 130 nm CMOS technology with 3.3 V supply voltage. The functionality of the proposed design is proven with measurements.
Subjects
low power
memristive device
neuromorphic application
relaxation oscillator
ultra low frequency