Frequenzvervielfacher

A Frequenzvervielfacher, or frequency multiplier, is an electronic circuit that generates an output signal with a frequency that is an integer multiple of an input signal's frequency. This multiplication is achieved through nonlinear operation within the circuit. Commonly used nonlinear elements include diodes, transistors, or operational amplifiers operated in a nonlinear region. When a sinusoidal input signal is applied to such a nonlinear device, its output will contain not only the fundamental frequency but also harmonics, which are integer multiples of the fundamental. A Frequenzvervielfacher circuit is designed to selectively amplify or filter these harmonics to produce the desired higher frequency output.

The process typically involves passing the input signal through a nonlinear device, which introduces harmonics. Subsequently, a resonant circuit or filter is employed to isolate and pass the specific harmonic that corresponds to the desired multiplication factor. For instance, to create a signal at three times the input frequency, a circuit would generate the third harmonic and filter out the others. Frequenzvervielfacher circuits are essential components in many electronic systems, particularly in radio frequency (RF) communication, signal generation, and frequency synthesis. They allow for the generation of higher frequencies from a stable, lower-frequency source, which can be more easily controlled and generated with greater accuracy.