Abstract: Embodiments provide a moldable warming device is configured to provide, using a heating disc, therapeutic warmth and, using a harmonic RFSVG, tuned harmonic resonance frequency stimulation vibration according to determined tuning parameters across the contour of the entire surface of the user's eyelid and periorbital structures to induce expression of shear thinned and liquified meibum from each Meibomian gland in all four eyelids to improve the lipid layer of the surface of the user's eye tear film. According to an embodiment, the moldable warming device further includes a pair of removable and reusable eye pads, each eye pad including a miniaturized optical coherence tomography device configured to map, in real-time, a topography of the user's periocular surface, including a mapping of the eyes and the nose including interpupillary distance and corneal apex height above the lateral canthus to optimize conformance of the pair of eye pads to the periocular surface of the user's eyelids.

Abstract: A control circuit having a digital memory for providing sweep voltages to ceivers in a doppler satellite tracking station of proper amplitude and duration to ensure searching in the correct doppler frequency range. An internally generated ramp function voltage is combined with a reference voltage to produce a composite sweep signal for the receiver. The reference voltage level is determined either from a set of digi-switches or from a digital memory circuit which outputs a digital signal that is a function of the frequency of a received doppler signal.

Abstract: A control circuit having a digital memory for providing sweep voltages to ceivers in a doppler satellite tracking station of proper amplitude and duration to ensure searching in the correct doppler frequency range. An internally generated ramp function voltage is combined with a reference voltage to produce a composite sweep signal for the receiver. The reference voltage level is determined either from a set of digi-switches or from a digital memory circuit which outputs a digital signal that is a function of the frequency of a received doppler signal.

Abstract: A digital frequency correlator circuit for comparing the frequencies of a urality of a-c signals to determine if they are coherent within a predetermined number of cycles. The a-c signals are converted into digital numbers representing their frequencies. The digital numbers are subtracted and the difference is compared, utilizing an exclusive-or circuit, with a predetermined number of cycles. If the difference is greater than the predetermined number of cycles, a logic 0 is outputted. If the difference is equal to or less than the predetermined number of cycles, a logic 1 is outputted.