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Now showing items 21-30 of 101

#### Two new minimum-component wien-bridge oscillators using current-conveyors

(1987)

Two new Wien-bridge oscillator circuits are presented. The circuits use the minimum number of active and passive components. The circuits enjoy low sensitivities, and are attractive for integration. Experimental results ...

#### Simple model for the transformer magnetizing characteristic

(1989)

A simple analytical expression is presented to model the transformer magnetising characteristic. The parameters of this model can be easily obtained using simple hand calculations. � 1989 by Hemisphere Publishing Corporation.

#### Defect density and structure of hydrogenated amorphous silicon-sulfur alloys

(1989)

The electronic and structural properties of a-Si, S:H alloys are investigated. Results show that the incorporation of sulfur leads to an increase in the bandgap, an increase in bonding disorder (manifested as an increase ...

#### A note on the nonlinear distortion performance of the Mach-Zehnder electro-optic modulator

(Kluwer Academic Publishers-Plenum Publishers, 1988)

A generalised large voltage analysis is presented for the Mach-Zehnder modulator and closed-form expressions are derived for the output harmonics and intermodulation products. Results obtained previously, for small voltages, ...

#### Brief communication, effect of carrier non-linearity upon the harmonic contents of PWM systems

(1989)

A simple formula is developed for the non-linear variation of the pulse-width resulting from a non-linear carrier-waveform in PWM systems. Using this formula, closed-form expressions are derived for the harmonic content ...

#### Two Minimum Component CCII-Based RC Oscillators

(1987)

Two minimum-component RC-sinusoidal oscillator Circuits using current conveyors are proposed. Each circuit uses a single current conveyor, two resistors, and two capacitors. The two circuits enjoy low sensitivity ...

#### X-ray, electrical conductivity and infrared studies of the system Zn1-xCOxMn1-xFexCrO4

(Kluwer Academic Publishers, 1989)

The system Zn1-xCoxMn1-xFexCrO4 is tetragonal in the range 0.0?x?0.4 and cubic in the range 0.5?x?1. Electrical resistivity temperature behaviour obeys Wilson's law for all the compounds and thermoelectric coefficient ...

#### A single channel queue with bulk service subject to interruptions

(1989)

This paper studies a single channel queueing system with Poisson arrivals and exponential service in batches of fixed size b ( ? 1). However, the service channel is subject to occasional breakdowns occuring randomly in ...

#### Nonlinear distortion due to early voltage effect in the current source transistors of bipolar transconductance stages

(1989)

A simple formula is presented for the input/output characteristics of the bipolar transconductance stage taking into account the Early voltage effect of the current source transistors. Also, a closed-form expression is ...

#### Brief communication Modelling the static emitter characteristics of unijunction transistors

(1989)

An empirical formula is presented for the static emitter characteristic of the unijunction transistor (UJT). The three parameters of the formula can be calculated easily from separate regions in the device characteristic ...