By H. Ahmed
This re-creation of Ahmed and Spreadbury's very good textbook Electronics for Engineers presents, just like the first variation, an creation to digital circuits overlaying the early a part of measure point classes in electronics and electric engineering. The textual content of the 1st version has been entensively revised and supplemented to deliver it modern; totally new chapters were additional just about electronic electronics. a primary bankruptcy at the common rules of sign dealing with in digital circuits is through descriptions of amplifiers utilizing field-effect and bipolar transistors and built-in circuit op-amps, written from the perspective of the engineering scholar increase a process. next chapters speak about the rules of using destructive and confident suggestions in amplifiers, major the reader to the ultimate chapters protecting electronic circuits and their purposes. All chapters finish with a solved challenge via a couple of perform questions from numerous universities to which solutions are given. This new version, just like the first, will turn out a worthwhile textual content for first and moment 12 months classes in universities and polytechnics on electronics and electric engineering and should be beneficial to practicing engineers and scientists who have to use analogue and electronic chips during their paintings.
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Extra info for Analogue and Digital Electronics for Engineers: An Introduction
Graphical presentation of gain (shown for 2N3819 output characteristics). t. circuit of fig. 10. Let the signal voltage be a sine wave, with a peak to peak amplitude of 1 volt as shown in fig. 12. 5 volts, shown by points Q and R. This disturbance should not be so large as to take the device close to the non-linear region of its characteristics. The drain current would fluctuate as shown in fig. t. would also fluctuate as predicted by the load line. If this voltage fluctuation at the drain is compared with the fluctuation in VGS, we realise that an amplified version of the input has been obtained at the drain terminal.
Thus we have the fourth forbidden region D, shown on the characteristics of fig. 9. t. as an amplifier of fluctuating voltages, or signals, we have to consider the steady state or DC conditions which must be provided for the device. We wish to know how to choose a supply voltage and a load, bearing in mind that we have to avoid the forbidden regions of the characteristics. If we do not fulfil this requirement the device may overheat and fail, or it may give a highly distorted output signal. 48 Field-effect transistor amplifier o vDD Fig.
2 V. Bias voltage VGG = - 1 V. 2 mA. Power dissipation in the device VDS x ID = 25 mW. 50 Amplification of signals 20 25 Drain-source voltage VDS (volts) Fig. 12. Graphical presentation of gain (shown for 2N3819 output characteristics). t. circuit of fig. 10. Let the signal voltage be a sine wave, with a peak to peak amplitude of 1 volt as shown in fig. 12. 5 volts, shown by points Q and R. This disturbance should not be so large as to take the device close to the non-linear region of its characteristics.
Analogue and Digital Electronics for Engineers: An Introduction by H. Ahmed