Chapter 19, Problem 26RQ

After numerous experiments with a circuit configuration, you determined that as long as the transistor chosen meets certain criteria, other components in the circuit can be adjusted to yield an ideal frequency response. In the classification diagram shown, there are two regions where the transistor is acceptable.

Zone A, shown in solid magenta lines, is defined as:

• a horizontal line at 7500 Hz for voltages from 0 to 3 V;
• a linear line from (3, 7500) to (6, 9000);
• A vertical line at 6 V for a frequency from 6000 to 9000 Hz; and
• a power law curve which extends from (0, 0) to (6, 6000), passing through the point (3, 4244).

Zone B, shown n blue, dotted line segments, defined as

• a horizontal lire at 7500 Hz for voltages horn 12 to 15 V;
• a vertical line at 8 V for a frequency from 0 to 3000 Hz; and
• an exponential curve which extends from (8, 3000), to (12, 7500), passing through the point (11, 6000).

If a point fails on a line dividing the Accept and Reject regions, it is considered acceptable. Create the classification diagram, duplicating the diagram exactly as shown.

The user will be asked if they wish to enter a set of test values using a menu choice of Yes or No. If the user selects Yes, they will be allowed to specify a pair of experimental test values for a specific transistor and store the response in the two-element vector Test. The first value in Test in the voltage and the second value is the measured frequency. If the user closes the menu rather than making a selection, a warning message should be displayed and the menu redisplayed until the user makes a selection. The program will check if the user has entered a two-element row vector, whit values of voltage between 0 and 15 volts and values of frequency between 0 and 10,000 hertz. If the user has entered an incorrect number as elements or values outside of either or both allowable ranges, give the user two more chances to enter the correct information. If the user fails to enter a matrix correctly within three total tries (the first try + two additional tries), terminate the program.

As long as the user enters a two-element row vector and values are within the correct ranges, the program will follow these steps:

• The program will determine if the V. f pair entered by the user is Accepted or Rejected:
• If the test value lies in an Accept region, the program will save in the cell array the text Accept Device in Zone # in a variable where # is replaced by the letter A or B depending on the Zone the point lies in.
• If the test value in anywhere outside an Accept region, the program will save in the cell array the test Reject Device.
• The program should also keep track, as running totals, of the number of points that have been accepted and the number rejected.
• The point is added to the classification diagram as a size 20 red, solid circle. The center of the circle should contain the point number entered by the user (1 for first point, 2 for second point, etc.)
• The user is then prompted by the menu to select if they wish to enter another pair of test values.
• If the user selects No from the menu or closes the menu at any time the program will end the input loop and show the results in the Command Window. If the user has entered at least one valid rosy vector and then enters a voltage value outside the acceptable range of 0 to 15 volts, the program will print the results in tabular format, similar to the following table. It will also report the number of points accepted and number of points rejected that were entered by the user.

Example showing tabular output to Command Window and the graph created

Your teats resulted in:

4Accepted Devices

6 Rejected Devices