Abstract: A wireless control system for ground-mobile robotic systems in which communication between the operator control unit and the unmanned ground vehicle is transmitted via a plurality of spectrally efficient simplex communication links.

Abstract: A wireless control system for ground-mobile robotic systems in which communication between the operator control unit and the unmanned ground vehicle is transmitted via a plurality of spectrally efficient simplex communication links.

Abstract: A clamp circuit including a clamping capacitor and a differential amplifier charge and discharge the clamping capacitor in accordance with the magnitude of difference signals applied to the differential amplifier's inverting and non-inverting inputs. The inverting input receives the voltage produced by the clamping capacitor. This voltage is digitized by an analog-to-digital converter (ADC) and is set to a reference voltage range by a voltage divider network. The ADC output signal is compared to a given reference level corresponding to a selected voltage in the reference voltage range to produce a difference output signal. This difference output signal is summed with the selected voltage in the reference voltage range and applied to the non-inverting input of the differential amplifier to produce a clamp voltage with substantially minimum offsets due to the amplifier, ADC and DAC.

Abstract: A video sharpness circuit comprising a delay circuit and a mixer for mixing an input video signal and the input video signal delayed by the delay circuit to develop an output video signal having improved sharpness. The mixer has a nonlinear gain for sharpening higher amplitude video signals more than lower amplitude video signals, and a circuit for adjusting the nonlinearity of the mixer.