Abstract: In one embodiment, a power source for providing high-voltage radio-frequency (RF) energy to an instrument such as a mass spectrometer includes an RF power amplifier having an output, an oscillating RF signal generator configured to provide first and second RF signals respectively oscillating at first and second frequencies to the RF power amplifier, and a step-up circuit for magnifying the RF power amplifier output. The step-up circuit includes an LC resonator network tuned to the first and second frequencies, and an output for providing the magnified voltage to a rod assembly of the mass spectrometer.

Abstract: In one embodiment, a power source for providing high-voltage radio-frequency (RF) energy to an instrument such as a mass spectrometer includes an RF power amplifier having an output, an oscillating RF signal generator configured to provide first and second RF signals respectively oscillating at first and second frequencies to the RF power amplifier, and a step-up circuit for magnifying the RF power amplifier output. The step-up circuit includes an LC resonator network tuned to the first and second frequencies, and an output for providing the magnified voltage to a rod assembly of the mass spectrometer.

Abstract: A system for generating a radio frequency (RF) signal at a drive frequency and a high voltage. The system includes a RF amplifier to amplify the voltage of a drive signal having a selected RF frequency. The amplified drive signal is used to drive a resonator to generate the RF signal such that the resonant frequency is the same or substantially the same as the drive frequency. A resonance tuning controller compares the drive frequency and the resonant frequency. If the resonant frequency and drive frequency are different, a temperature changing element is controlled to either increase heat or decrease heat radiating toward a tuning component with a resonance parameter that varies with temperature. For example, the heat may change the capacitance of the tuning capacitor causing a change in the resonant frequency of the resonator.

Abstract: A radio frequency (RF) source signal is received at a first amplifier and amplified to a first power level over a wide frequency range, which may include frequencies effective for resonantly exciting nuclear magnetic resonance (NMR)-active nuclei. The amplified signal may be transmitted over a first path or a second path, which may be selected via a switch. When the first path is selected, the amplified signal is transmitted over the wide frequency range to a signal output. When the second path is selected, the amplified signal is received at a second amplifier, amplified to a second power level over a low frequency range, and transmitted to the signal output.

Abstract: Systems and methods are described for a download booster for ADSL transmission. A method includes extending a digital subscriber loop including: coupling a telephone company central office to a customer premises via the digital subscriber loop; filtering a downstream digital subscriber loop signal at the customer premises; and amplifying the downstream digital subscriber loop signal at the customer premises. A method, includes: providing a digital subscriber loop service to a customer premises that is coupled to a telephone central office via a digital subscriber loop line; filtering a downstream digital subscriber loop signal at the customer premises; and amplifying the downstream digital subscriber loop signal at the customer premises.

Abstract: Systems and methods are described for a download booster for ADSL transmission. A method includes extending a digital subscriber loop including: coupling a telephone company central office to a customer premises via the digital subscriber loop; filtering a downstream digital subscriber loop signal at the customer premises; and amplifying the downstream digital subscriber loop signal at the customer premises. A method, includes: providing a digital subscriber loop service to a customer premises that is coupled to a telephone central office via a digital subscriber loop line; filtering a downstream digital subscriber loop signal at the customer premises; and amplifying the downstream digital subscriber loop signal at the customer premises.