Patent ID: 8923104

Claim:
An analog-to-digital converter for digitizing an optical tape wobble signal, the analog-to-digital converter comprising: a feedback loop that receives the wobble signal having a wobble signal frequency, the feedback loop including: a comparator that receives the wobble signal through a first resistive component at a first comparator input and outputs a first output signal having a high voltage output value or a low voltage output value; a sampling component that samples the first output signal at a sampling frequency and outputs a second output signal, the sampling frequency being at least 50 times greater than the wobble signal frequency; and a first integrator component that receives the second output signal and outputs a third output signal, the third output signal being provided to the first comparator input through a second resistive component, wherein the third output signal tracks the wobble signal due to feedback action in the feedback loop; and a final discrete integrator component that integrates the second output signal to provide a digital representation of the wobble signal.