The main circuit of this design adopts the Wien bridge oscillator circuit. The operational amplifier uses LM741CN, and nonlinear elements (such as thermistors or JFETs with negative temperature coefficients) are used to automatically adjust the strength of feedback to maintain the constant output voltage, thereby achieving the purpose of automatic amplitude stabilization, so that the output amplitude can be guaranteed to be 2Vp-p; and the frequency range is determined by the formula fo=1/2πRC and the frequency range given in the question to determine the value of the resistor R or capacitor C, so that it meets the requirements of the question.
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