The square wave output by the comparator passes through the integrator to get the triangle wave with the same frequency, as shown in the figure below: The square wave generation is specifically composed of a hysteresis comparator and RC feedback, and its voltage transmission characteristics are shown in the following figure:Дuring the comparison process, the capacitor cycles charge and discharge to generate self-excited oscillation, so a square wave can be generated. The square wave-triangular wave generating circuit is a self-excited oscillation circuit composed of a hysteresis comparator and an RC integrator, and the output signals of the two are mutually input signals. Square wave-triangle wave generating circuit and working principle The function generator designed in the experiment includes a square wave-triangular wave generating circuit composed of a comparator and an integrator, and a triangular wave-sine wave conversion circuit composed of a differential amplifier circuit, which can generate square waves, triangle waves, and sine waves in sequence, and combine the modules. (2) The output peak-to-peak value Uopp of the three waveforms are continuously adjustable in the range of 1~10V. (1) Change the output square wave to a rectangular wave with adjustable duty cycle, and the adjustable range of duty cycle is 30%-70% (4) The output voltage of sine wave signal Uoppв‰Ґ1V, without obvious distortion. (3) Triangle wave signal output voltage Uopp=8V (error <20%) (2) Square wave output voltage Uopp=12V (error <20%), the rising and falling edges are less than 10us (1) The output frequency can be continuously adjusted within the range of 1-10KHZ Design and make one Square wave-triangle wave-sine wave signal generator, The power supply is в‘2V.

Function generator multisim