This relaxation oscillator, simulated in the Multisim Blue, produces two different signals. The circuit employ the Operational Amplifier 741. Other operational amplifiers can be tested. The circuit needs a dual power supply with voltages between 9 and 15 V. Frequency is given by C1. Observe the adjustments of the Oscilloscope to display the generated signals.
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To download the simulation files and Netlist - click here (msb0014e.zip)