The present invention relates to a radiofrequency oscillator comprising an optical resonator being a ring waveguide allowing the propagation of a first wave in a first direction and of a second wave in a second direction, the second direction being opposite to the first direction, and the resonator comprising an active optical medium generating a first optical line from the first wave and a second optical line from the second wave, the resonator being in contact with a part made of a material featuring a magneto-optic effect, an applier of external magnetic field of adjustable intensity on the resonator generating a frequency offset between the first wave and the second wave, and a processing circuit converting the beat between the two optical lines in a radiofrequency signal.

An example frequency converter includes a drift canceling loop with a balanced delay and a linear signal path (e.g., linear with respect to frequency scaling, amplitude modulation, and/or phase modulation). One side of the drift canceling loop includes a fixed delay, and the opposite side includes an adjustable, complementary delay. The adjustable, complementary delay facilitates precision matching of the signal delays on each side of the loop over a range of frequencies, which results in a significant improvement in noise cancelation, particularly at large offsets to the carrier, while permitting the use of a higher noise, but very fast tuning course scale oscillator. The linear signal path from the signal generator to an RF output facilitates modulation of the signal by the signal generator. A modular format is an advantageous embodiment of the invention that includes the removal of the frequency synthesizer's low phase noise reference into a separate module.

An example frequency converter includes a drift canceling loop with a balanced delay and a linear signal path (e.g., linear with respect to frequency scaling, amplitude modulation, and/or phase modulation). One side of the drift canceling loop includes a fixed delay, and the opposite side includes an adjustable, complementary delay. The adjustable, complementary delay facilitates precision matching of the signal delays on each side of the loop over a range of frequencies, which results in a significant improvement in noise cancelation, particularly at large offsets to the carrier, while permitting the use of a higher noise, but very fast tuning course scale oscillator. The linear signal path from the signal generator to an RF output facilitates modulation of the signal by the signal generator. A modular format is an advantageous embodiment of the invention that includes the removal of the frequency synthesizer's low phase noise reference into a separate module.

An example frequency converter includes a drift canceling loop with a balanced delay and a linear signal path (e.g., linear with respect to frequency scaling, amplitude modulation, and/or phase modulation). One side of the drift canceling loop includes a fixed delay, and the opposite side includes an adjustable, complementary delay. The adjustable, complementary delay facilitates precision matching of the signal delays on each side of the loop over a range of frequencies, which results in a significant improvement in noise cancellation, particularly at large offsets to the carrier, while permitting the use of a higher noise, but very fast tuning course scale oscillator. The linear signal path from the signal generator to an RF output facilitates modulation of the signal by the signal generator. A modular format is an advantageous embodiment of the invention that includes the removal of the frequency synthesizer's low phase noise reference into a separate module.

An example frequency converter includes a drift canceling loop with a balanced delay and a linear signal path (e.g., linear with respect to frequency scaling, amplitude modulation, and/or phase modulation). One side of the drift canceling loop includes a fixed delay, and the opposite side includes an adjustable, complementary delay. The adjustable, complementary delay facilitates precision matching of the signal delays on each side of the loop over a range of frequencies, which results in a significant improvement in noise cancellation, particularly at large offsets to the carrier, while permitting the use of a higher noise, but very fast tuning course scale oscillator. The linear signal path from the signal generator to an RF output facilitates modulation of the signal by the signal generator. A modular format is an advantageous embodiment of the invention that includes the removal of the frequency synthesizer's low phase noise reference into a separate module.

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.

The present invention relates to a radiofrequency oscillator comprising an optical resonator being a ring waveguide allowing the propagation of a first wave in a first direction and of a second wave in a second direction, the second direction being opposite to the first direction, and the resonator comprising an active optical medium generating a first optical line from the first wave and a second optical line from the second wave, the resonator being in contact with a part made of a material featuring a magneto-optic effect, an applier of external magnetic field of adjustable intensity on the resonator generating a frequency offset between the first wave and the second wave, and a processing circuit converting the beat between the two optical lines in a radiofrequency signal.

A multi-phase clock circuit includes a first delay circuit, a second delay circuit, a third delay circuit, a first clock mixer circuit, and a second clock mixer circuit. The first, second, and third delay circuits are coupled in series. The first clock mixer circuit includes a first input and a second input. The first input is coupled to an output of the first delay circuit. The second input is coupled to an output of the second delay circuit. The second clock mixer circuit also includes a first input and a second input. The first input of the second clock mixer circuit is coupled to an output of the second delay circuit. The second input of the second clock mixer circuit is coupled to an output of the third delay circuit.

Techniques are described for reducing frequency pulling in voltage-controlled oscillator (VCO) circuits. Some embodiments operate in context of a transmitter having a VCO and a power amplifier (PA), where resonant components of the VCO are impacted by magnetically coupled feedback from resonant components of the PA. The VCO and PA are coupled via a set of signal path components that cause signal path delay, such that the feedback signal is phase-delayed with respect to the signal generated by the VCO. A coupling delay matching system is used to introduce additional delay, thereby further phase-shifting the feedback signal to an integer multiple of the oscillation period of the VCO signal; thereby reducing frequency pulling of the VCO.

Techniques are described for reducing frequency pulling in voltage-controlled oscillator (VCO) circuits. Some embodiments operate in context of a transmitter having a VCO and a power amplifier (PA), where resonant components of the VCO are impacted by magnetically coupled feedback from resonant components of the PA. The VCO and PA are coupled via a set of signal path components that cause signal path delay, such that the feedback signal is phase-delayed with respect to the signal generated by the VCO. A coupling delay matching system is used to introduce additional delay, thereby further phase-shifting the feedback signal to an integer multiple of the oscillation period of the VCO signal; thereby reducing frequency pulling of the VCO.