Abstract: An electronic arrangement and method for providing a signal characterized by reduced phase noise having a signal source for providing a stimulus signal, a modulator coupled to the signal source for generating a modulated signal as function of the stimulus signal and a local oscillator signal, and a mixer combining the stimulus and modulated signals to generate a mixed signal that includes a component characterized by a mathematical difference of the stimulus signal and the modulated signal. The modulated signal is substantially identical to the stimulus signal and offset by a frequency of the local oscillator signal, so that the difference component of the mixed signal results in a local oscillator signal wherein the stimulus signal phase noise generated by the signal source has been mathematically cancelled.

Abstract: An electronic arrangement and method for providing a signal characterized by reduced phase noise having a signal source for providing a stimulus signal, a modulator coupled to the signal source for generating a modulated signal as function of the stimulus signal and a local oscillator signal, and a mixer combining the stimulus and modulated signals to generate a mixed signal that includes a component characterized by a mathematical difference of the stimulus signal and the modulated signal. The modulated signal is substantially identical to the stimulus signal and offset by a frequency of the local oscillator signal, so that the difference component of the mixed signal results in a local oscillator signal wherein the stimulus signal phase noise generated by the signal source has been mathematically cancelled.

Abstract: An electronic arrangement and method for providing a signal characterized by reduced phase noise having a signal source for providing a stimulus signal, a modulator coupled to the signal source for generating a modulated signal as function of the stimulus signal and a local oscillator signal, and a mixer combining the stimulus and modulated signals to generate a mixed signal that includes a component characterized by a mathematical difference of the stimulus signal and the modulated signal. The modulated signal substantially identical to the stimulus signal and being offset by a frequency of the local oscillator signal, so that the difference component of the mixed signal results in a local oscillator signal wherein the stimulus signal phase noise generated by the signal source has been mathematically cancelled.

Abstract: An electronic arrangement and method for providing a signal characterized by reduced phase noise having a signal source for providing a stimulus signal, a modulator coupled to the signal source for generating a modulated signal as function of the stimulus signal and a local oscillator signal, and a mixer combining the stimulus and modulated signals to generate a mixed signal that includes a component characterized by a mathematical difference of the stimulus signal and the modulated signal. The modulated signal substantially identical to the stimulus signal and being offset by a frequency of the local oscillator signal, so that the difference component of the mixed signal results in a local oscillator signal wherein the stimulus signal phase noise generated by the signal source has been mathematically cancelled.

Abstract: A hydraulic system, suitably an ink supply system for an ink jet printer, wherein a first pump conveys ink under pressure from a reservoir to a work head and a gear pump returns unused liquid from a collector at the work head to the reservoir. A bleed line connects an outlet from the first pump to an inlet to the gear pump. Accordingly, there is a flow of liquid via the bleed line such that the gear pump applies sufficient suction to the collector to draw air or a mixture of air and unused liquid therefrom. The flow is also sufficient to ensure adequate lubrication of the gear pump. The first pump may also be a gear pump, in which case the two pumps are formed as a double-ended pump.

Abstract: A device for providing a gas-air mixture to a patient in response to suction applied by the patient, comprising means defining an air inlet, a backward-facing step, an air passage for directing air past said backward-facing step, a non-return valve for controlling flow of air from said inlet to said air passage and a gas passage communicating with said air passage through at least one orifice adjacent to said backward-facing step.