Simple boxcar integrator covering a large input frequency range

Williams, Paul; Lam, Ho

doi:10.1088/0022-3735/18/1/007

Cited by 3 publications

(2 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The modified boxcar integrator system consists of a preamplifier, delay and gate control module, integrator, and computer interface. In the case of preamplifier, the circuit description of Williams et al 7 was used. The integrator circuit consists of a gate switching transistor, integrator, and isolation amplifier.…”

Section: New Technique For Measuring Carrier Mobility Using a Modifiementioning

confidence: 99%

New technique for measuring carrier mobility using a modified boxcar integrator

Wee

Han

Son

et al. 2009

Review of Scientific Instruments

View full text Add to dashboard Cite

A new technique for measuring the drift carrier mobility is described. A boxcar integrator was modified to enable a delay-time scan using simple decimal counters. The transient photocurrent was integrated repeatedly using the modified boxcar integrator. After simple signal processing, the original photocurrent was recovered with enhanced signal to noise ratios. The hole mobility of a 4,4(')-bis[N-(1-naphthyl)-N-phenylamino]biphenyl (NPB) thin film was measured using the new method. The mobility of NPB under an electric field as low as 2.5x10(4) V cm(-1) was calculated to be 5.84x10(-4) cm(2) V(-1) s(-1). This method may be a useful measurement technique when either the electric field or signal to noise ratio is very low.

show abstract

Section: New Technique For Measuring Carrier Mobility Using a Modifiementioning

confidence: 99%

New technique for measuring carrier mobility using a modified boxcar integrator

Wee

Han

Son

et al. 2009

Review of Scientific Instruments

View full text Add to dashboard Cite

show abstract

“…The generated output is then offered for quadrature SD 1 (QSD) to extract the low frequency component referenced to the carrier wave. In contrast to SD methods which are now routinely available in digital format [3]- [5], GI has been embodied mostly in analogue and hybrid implementations [2], [6]- [11] and rarely in digital [12]. Gated radiometry has been demonstrated in a fully digital system to mitigate the effects of occlusion in particle-rich ambient [13].…”

Section: Introductionmentioning

confidence: 99%

Pulse Detection by Gated Synchronous Demodulation

Efthymiou

Ozanyan

2013

IEEE Sensors J.

View full text Add to dashboard Cite

Synchronous demodulation (SD) is the signal recovery method of choice when the input envelope signal is modulated by either a pure sine wave or a square wave. SD is less efficient for pulsed periodic signals with a low duty factor. For the latter signals, we introduce data processing that applies gating on a part of the signal period to achieve optimum conditions for recovering the pulse amplitude by quadrature SD. The proposed method is evaluated for signal-to-noise performance against Boxcar-type gated integrators in simulated data, as well as data acquired from physical measurements, in the presence of 1/f and Gaussian noise. It is shown that by combining the gating and SD principles, our suggested gated SD outperforms other routine signal processing methods under typical 1/f noise conditions.

show abstract

Design of a low-cost detection system for laser-induced plasma spectroscopy

Neuhauser

Ferstl

Haisch

et al. 1999

Review of Scientific Instruments

View full text Add to dashboard Cite

A low-cost detection system for laser-induced plasma spectroscopy (LIPS) is described. The system comprises a Rowland spectrometer with photomultiplier detection and a miniaturized multiple gated integrator system. The sensitivity and the spectral band pass of the system were characterized and compared to a conventional Czerny–Turner system with an intensified diode array detector for chromium as representative analyte. Both, the sensitivity and spectral resolution were found to be sufficient for the intended simultaneous multielement LIPS analysis of simple and constant matrices.

show abstract

Simple boxcar integrator covering a large input frequency range

Cited by 3 publications

References 1 publication

New technique for measuring carrier mobility using a modified boxcar integrator

New technique for measuring carrier mobility using a modified boxcar integrator

Pulse Detection by Gated Synchronous Demodulation

Design of a low-cost detection system for laser-induced plasma spectroscopy

Contact Info

Product

Resources

About