Low-Frequency Noise of Resistively Coupled Charge Amplifiers

Bönisch, S.; Namaschk, Bernhard; Wulf, F.

doi:10.1109/tns.2008.2000774

Cited by 4 publications

(4 citation statements)

References 9 publications

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“…The measuring results shown in figure 8 can prove this conclusion. The lower cut-off frequency f L = 5.053 Hz is obtained from equation (20). The two filters compose a band-pass filter.…”

Section: Proposed Designmentioning

confidence: 99%

“…Therefore, scientific research on the zero drift in the ultrahigh-g impact environment is necessary. In addition to piezoelectric accelerometers, which are the essential reason for zero drifts, the illogical design of charge amplifiers (CA) is another important reason for zero drifts [18][19][20]. Accordingly, it is very important both to optimize the structures of sensors and to improve the design of the CA and subsequent circuits as well.…”

Section: Introductionmentioning

confidence: 99%

“…Moreover, in practice, the on-board measurement system (including sensor, cable, amplifiers, circuits and so on) may be influenced by environmental factors, such as temperature, humidity, base strain, cable noise, magnetic field, grounding system and so on. All these factors may cause real-time static or quasi-static zero drifts [20].…”

Section: Introductionmentioning

confidence: 99%

“…Besides the sensor optimization, some new improved CA are presented, which can perform well for restraining some kinds of zero drifts. For example, some transistor input stages, including field-effect transistors, bipolar or MOS transistors and high electron mobility transistors, were introduced for noise suppression [20][21][22][23][24]. These methods can just reduce the level of input noises and improve the precision of the small signal, but are useless for the high load input condition.…”

Section: Introductionmentioning

confidence: 99%

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Restraining zero drift in an ultrahigh-gimpact environment

Xia

Fan

Xing

et al. 2012

Meas. Sci. Technol.

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To restrain the zero drift of a piezoelectric accelerometer and the zero drift from a charge amplifier (CA) in an ultrahigh-g impact environment, a reformative design approach for an on-board ultrahigh-g deceleration-time measurement system is presented. First, a simplified zero-drift model of the on-board ultrahigh-g deceleration-time measurement system is built. Secondly, possible reasons for zero drifts in the ultrahigh-g impact environment are discussed. Then, a universal reformative CA and subsequent circuits are designed for restraining the zero drift. Finally, an air cannon is used to simulate the ultrahigh-g impact environment and a modified Michelson-type laser interferometer is set as a primary standard source to calibrate the reformative on-board measurement system. Comparisons between the measured curve and the reference curve verify that the zero drift is less than 3% of the peak value and deceleration-time data describe the real penetration process accurately. All differences in curves are not due to the proposed design and can be characterized by errors or uncertainties. Experimental results prove that the proposed design approach can restrain the zero drift effectively in the ultrahigh-g impact environment.

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“…The measuring results shown in figure 8 can prove this conclusion. The lower cut-off frequency f L = 5.053 Hz is obtained from equation (20). The two filters compose a band-pass filter.…”

Section: Proposed Designmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%