The basic construction of a Wien bridge oscillator comprises of low frequency amplifiers which are used to produce positive and negative feedback. A feedback is a method of sampling a part of the output signal and mixing it with some obtained part of the signal source. The mixture is then fed to the input of the active feedforward element of the feedback loop. The energy obtained from an external signal source which comes from outside the system, comprises the input to the system as a whole. This input in prone to noise and leakage on its way to and within the system. The feedback element mixes the input with a sample from the output within the system. A well defined loop around which the signal power propagates is the concept behind the feedback creation.