Semiconductor light sources, like laser diodes or ultrabright light emitting diodes, are widely
used in optical spectroscopy. In this presentation an overview of applications in …

The grayscale resolution of liquid crystal displays (LCDs) can be improved by modulating
the grayscale of the pixels in LCDs or by dimming the LCD backlight source. Changing the …

We have built a high dynamic range (nine decade) transimpedance amplifier with a linear
response. The amplifier uses junction-gate field effect transistors (JFETs) to switch between …

We have proposed a method of increasing the switching speed of a light-emitting diode by
controlling the voltage across the device rather than the current through it. While the speed …

The goal of this thesis is the development of a nanoscale Coulter counter for the direct
electrical detection of specific genetic sequences of deoxyribonucleic acid (DNA); the …

Theoretical analysis of the stability and error in the LED-logarithmic electrometer is
presented. It has been shown that a resistance in series with the log element improves the …

The hardware and software of the Keithley 617 Programmable Electrometer System, which
is used for electrical characterization of materials and devices, have been automated so that …

Abstract A Quadrupole Mass Filter (QMF) is a key component of a Quadmpole Mass
Spectrometer (QMS) that provides the mass to charge discrimination required to separate …