It returns to the original place when going around the circle. At present, it uses the unit, the hertz (Hz), to show the frequency. It was using the word, the cycle per second, before as the unit which shows the frequency. This shows the 1-second number of rotations.(The once is the 1 cycle) The many turns occur in the high frequency.
With a conventional tone burst generator, a considerable number of harmonics are generated. These extend to sub-audible frequencies, and excite resonances that have nothing to do with the actual test frequency. By gradually increasing the amplitude of each cycle of the test waveform, then decreasing it again using a cosine waveform envelope, these unwanted harmonics are minimised.
with Crystal Accuracy
A circuit generates three-phase sine waves with excellent amplitude and phase symmetry. A variable-frequency, three-phase, sine-wave generator circuit has been designed for use as a source of polyphase excitation in studies of the propagation of traveling
which outputs the Sine wave and the Cosine wave at the same time using the operational amplifier.
The Wien bridge sine wave oscillator to introduce is the oscillator which works in the oscillation by returning(positive feedback) the oscillation output to the input.