Electronic Devices and Amplifier Circuits with MATLAB by Steven T Karris

By Steven T Karris

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Extra info for Electronic Devices and Amplifier Circuits with MATLAB Computing

Example text

Find the voltage V out . 22. 23 we have replaced the diodes by their piecewise linear equivalents and have combined the two parallel resistors. 7 V with the applied voltages, and r D = 1 ⁄ slope = 50 × 10 2−14 –3 A ⁄ V = 20 Ω . 23. 4 Let us follow the procedure below to find out if we can arrive to a valid answer. 3 mA I1 + I2 + I3 ≠ I4 We see that the current I 1 cannot be negative, that is, it cannot flow on the opposite direction of the one shown. Also, the current I 2 is zero.

Current should not equal this value for more than a few milliseconds. The maximum reverse−bias voltage that may be applied to a diode without causing junction breakdown is referred to as the Peak Reverse Voltage (PRV) and it is the most important rating. All of the above ratings are subject to change with temperature variations. If, for example, the operating temperature is above that stated for the ratings, the ratings must be decreased. There are many types of diodes varying in size from the size of a pinhead used in subminiature circuitry, to large 250−ampere diodes used in high−power circuits.

The bode(sys,w) function displays both magnitude and phase. If we want to display the magnitude only, we can use the bodemag(sys,w) function. • Amplifiers are often represented by equivalent circuits also known as circuit models. The common types are the voltage amplifier, the current amplifier, the transresistance amplifier, and the transconductance amplifier. 12 Exercises 1. 1, derive and sketch the magnitude and phase responses for an RC high−pass filter. 2. Derive the transfer function G ( s ) for the network shown below.