Free Simple Circuit Diagram
This is a sine wave generator circuit. It generates an adjustable sine wave betwen 15 Hz to 150 kHz. This circuit uses the principle of Wien-bridge oscillator, with multiple capacitor selection. Here is the circuit: To control the frequency, this circuit uses a stereo 10K potentiometer. This circuit is using two potentiometers that have a single axis. It was shown […]
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Quadrature oscillator is another type of phase shift oscillator. This circuit produce two sine wave signal. One of them is shifted 90 degree from the other signal. The output that shifted 90 degree is called cosine signal and the other is called sine circuit has two output. Here is the circuit : This circuit has three phase shifter sections. Each […]
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We can create Crystal Colpitts oscillator using a parallel mode crystal and a transistor. The circuit shown by the following figure As an inductance, this circuit uses crystal. The crystal circuit consist of a large value capacitive divider that is used between gate, a small series capacitor, ground, and source. Component’s values that we choose must produce a highest ratio […]
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One example of the phase shift oscillator is Bubba oscillator. This oscillator gets 45 degree phase shift for each section from quad op-amp package. The result is excellent d(phase)/d(t) to obtain very low frequency drift. The circuit is shown below: 45 degree phase shift is obtained from Each RC section. The alternating section generate a low impedance quadrature output. The […]
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