You will learn much more by actually building and analyzing real circuits. Forsuccessful circuit-building exercises,follow these steps:1.Draw the schematic diagram for the circuit to be analyzed.2. Mathematically analyze the circuit,solving for all voltag...[继续阅读]

    In mathematics,Fourier analysis is the study of how general functions can bedecomposed into trigonometric or exponential functions with definite frequencies.According to Fourier analysis theory,Fourier series of a square wave s(t) withangular frequency ω ...[继续阅读]

    Take Q1 and Q2 as current sources controlled by their base voltages. The smallsignal collector current can be expressed asiC=gm·vBE (5.3)where the transconductance gm is set by the DC collector current. gm≈IC/VT,where the thermal voltage VT is about 25 mV...[继续阅读]

    1.Build square wave generator according to Figure 9.1(a). Choose resistors R1=R2=10kΩ,capacitor C=0.1μF,and potentiometer Rp=100kΩ. Set thevoltage supply to±12V.Adjust Rp to different values,measure the output voltage and period,fillthe recorded data in T...[继续阅读]

    The output of the amplifier is ideally proportional to the difference between thetwo input voltagesVout=Ad(V+in-V+in)where Ad is the differential gain of the amplifier.In fact,however,the gain is not quite equal for the two inputs. This means,for instance...[继续阅读]

    1.Analog multimeters use a microammeter with a moving pointer to displayreadings. Digital multimeters have numeric displays and have made analogmultimeters obsolete as they are cheaper,more precise,and more physicallyrobust than analog multimeters.模拟万用表使用...[继续阅读]

    1. Quiescent setting.Construct the circuit shown in Figure 5.1,then make the circuit quiescent (nosignal applied) by connecting both bases to ground,i.e.V+in=V-in=0.Adjust Rp so that VC1=VC2,measure the DC voltages and fill the recorded datain Table 5.1. ...[继续阅读]

    1. Filters can be used to separate signals,passing those of interest,andattenuating the unwanted frequencies.滤波器可用于分离信号,允许感兴趣的频率通过,同时阻止那些不想要的频率成分.2. In addition,there are filters that do not filter any frequencies of a complexinput s...[继续阅读]

    An electronic oscillator produces a periodic,oscillating electronic signal,suchas sine wave,square wave,triangle wave,etc. A linear oscillator circuit which usesan RC network,a combination of resistors and capacitors,for its frequencyselective part is cal...[继续阅读]

    An ideal filter will have a fixed gain of amplitude response for the frequenciesof interest and zero everywhere else. The frequency range that is allowed to pass iscalled passband,whereas the range that signal is greatly attenuated is calledstopband. The ...[继续阅读]