Abstract: An optical sensor includes a detector having a printed circuit board (PCB) and an inductive loop. The printed circuit board (PCB) has a photodiode cathode pad with a photodiode. The inductive loop is arranged around at least part of the photodiode cathode pad, and configured to receive inductive loop inducing signaling, and provide inductive loop signaling around the at least part of the photodiode cathode pad to provide inductive on the PCB to reduce or substantially eliminate unwanted electrical interference in electrical photodiode signaling provided from the photodiode. The inductive loop includes a trace and at least one via. The trace has a route along a signal path from a transistor collector pin around an LED anode pad. The at least one via is placed between LED anode pads to route the trace on a top side of the PCB, and the trace is routed alongside, near and around the photodiode cathode pad back to the LED anode of the LED anode pad.

Abstract: Apparatus and method are presented for adaptively compensating for carrier signal phase distortion caused by amplitude modulating an RF carrier signal. A modulator-amplifier network receives an RF carrier signal and modulates it by a received amplitude varying signal to obtain therefrom a modulated RF carrier signal which is phase shifted from the phase of the carrier signal applied to the network by an amount that varies with the value of the amplitude varying signal. A phase shifter receives the RF carrier signal and phase shifts it in accordance with the value of a received phase correction signal to provide a pre-phase shifted carrier signal that is applied to the modulator-amplifier network. A phase detector receives and compares the modulated RF carrier signal and the carrier signal and provides an error signal in accordance with the comparison.

Abstract: An RF power amplifier system is presented herein. It includes a plurality of RF power amplifier modules. At least two encoders are provided. Each encoder is associated with and controls the operation of some of the plurality of power amplifier modules. Each encoder is associated with different ones of the plurality of amplifier modules. An exciter receives an amplitude varying input signal and periodically provides a command signal to each of the modulation encoders and instructs that modulation encoder as to how many of its associated power amplifier modules are to be turned on as a function of the value of the input signal. Each modulation encoder responds to a received command signal and selects which of its associated power amplifiers to turn on.