Free Simple Circuit Diagram
This is a 100MHz Varicap Oscillator circuit. This circuit can provide modulation signals less than 28V and frequency deviation of 28 MHz peak-to-peak. This circuit uses two variable-capacitance diodes which is connected to d-c bias and audio modulating signals in parallel connection and connected in series to r-f. Here is the circuit: [Circuit’s schematic diagram source: seekic.com]
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Multivibrators is two state devices which is used extensively in digital electronics. The bistable multivibrators or called filp-flop are the basic memory devices used in sequential logic. Beside bistable multivibrator, there are also astable multivibrator which serves as an oscillator and the monostable multivibrator (on shot multivibrator) which can serve as a pulse source. The NAND gate inverters configuration shown […]
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Phase shift oscillators uses capacitors to shift the phase of a signal coming from the output of an amplifier. If the phase shifting match the frequency, then a positive feedback will be produced a continuous sine waveform. Here is the basic schematic diagram of the circuit: To maintain the oscillation, the gain of the amplifier should produce exactly same amplitude […]
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This Wien bridge oscillator uses incandescent lamp to stabilize its amplitude. This amplitude stabilization gives a low distortion output. Multiple frequency range selector gives flexible and fine adjustment for the frequency. Here is the schematic diagram of the circuit: The 20k potentiometers is a dual channel pot, which is commonly used in stereo audio circuits. You can many types of […]
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