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Charge Amplifier With an Enhanced Frequency Response for SPM-Based Data Storage
Cited 4 time in
Web of Science
Cited 3 time in Scopus
- Authors
- Issue Date
- 2010-09
- Citation
- IEEE Transactions on Circuits and Systems Part 2 Express Briefs Vol. 57, No. 9, pp. 691-695
- Keywords
- CMOS ; data storage ; Charge amplifier ; frequency compensation ; lead zirconate titanate (PZT) ; microelectromechanical system (MEMS) ; scanning probe microscopy (SPM) ; thermopiezoelectric cantilever
- Abstract
- Storage systems based on scanning probe microscopy
incorporate an array of thermopiezoelectric cantilevers that require
charge amplifiers with a wide frequency response but low
power consumption.We use an improved frequency compensation
method to enhance the in-band frequency response without requiring
any additional power. Measurements show that the prototype
chip draws the same 68 μA at 1.8 V as an unmodified design but
has a closed-loop frequency response that is ten times greater. The
chip was fabricated in a 0.18-μmstandard CMOS process, and the
charge amplifier core occupies 0.042 mm2.
- ISSN
- 1549-7747
- Language
- English
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