A control unit generates pulse width modulation (PWM) pulses for an inverter. The control unit has a noise reducer configured to generate an opposing signal for active noise reduction. The noise reducer is configured to set a phase angle of the opposing signal based upon a predefined PWM frequency.

A control unit generates pulse width modulation (PWM) pulses for an inverter. The control unit has a noise reducer configured to generate an opposing signal for active noise reduction. The noise reducer is configured to set a phase angle of the opposing signal based upon a predefined PWM frequency.

Described is a transmission system (100 to 1000) including a data output unit (110, 210, 810b), for instance a camera operating within MRI environment. In an embodiment, a control transfer unit (812b to 812d) may manage the operation of the data output unit (110, 210, 810b), wherein the control transfer unit (812b to 812d) may be preferably located closely to data output unit (110, 210, 810b), e.g. mounted in vicinity of MRI device (192) or within a radius of less than 5 meters or less than 3 meters from the MRI device (192). The control transfer unit (812b to 812d) may have one connection or multiple connections to at least one additional secondary control unit, e.g. to sending and receiving units (250, 250b1, 250b2). Each of the sending and receiving units (250, 250b1, 250b2) and/or the control transfer unit (812b to 812d) may be capable of receiving the data from the data output unit (110, 210, 810b), send control data/signals and/or acknowledge control data/signals issued by other sending and receiving units (110, 210, 810b) and/or by the control transfer unit (812b to 812d). Each pair of optically coupled units may be connected via single optical fiber connection.

Disclosed is a system (100, 200) for communicating with a subject and/or for supervision of a subject during magnetic resonance imaging (MRI), comprising: a camera device (110, 210) that is configured to be placed within an interior space (194) of an MRI device (192), an optional optical output device (120, 220) for generating electromagnetic radiation in the visible spectral range that is configured to be placed within the interior space (194) of the MRI device (192), and -an electronic control unit (130, 230) that is configured to be placed within a distance less than 5 meters or less than 3 meters from the MRI device and/or from the optional optical output device (120, 220) and/or from the camera device (110, 210), wherein the optional optical output device (120, 220) is configured to be arranged within the field of view of a subject who is located within the interior space (194) and wherein the optional optical output device (120, 220) is configured to send optical signals (Si1, Si2) to the subject, wherein the electronic control unit (130, 230) is configured to control operation of the camera device (110, 210) and/or of the optical output device (120, 220).

Disclosed is a system (100, 200) for communicating with a subject and/or for supervision of a subject during magnetic resonance imaging (MRI), comprising: a camera device (110, 210) that is configured to be placed within an interior space (194) of an MRI device (192), an optional optical output device (120, 220) for generating electromagnetic radiation in the visible spectral range that is configured to be placed within the interior space (194) of the MRI device (192), and -an electronic control unit (130, 230) that is configured to be placed within a distance less than 5 meters or less than 3 meters from the MRI device and/or from the optional optical output device (120, 220) and/or from the camera device (110, 210), wherein the optional optical output device (120, 220) is configured to be arranged within the field of view of a subject who is located within the interior space (194) and wherein the optional optical output device (120, 220) is configured to send optical signals (Si1, Si2) to the subject, wherein the electronic control unit (130, 230) is configured to control operation of the camera device (110, 210) and/or of the optical output device (120, 220).

A structure for generating sequences. The structure includes a binary shift register; a feedback structure connected to the shift register arranged to define a linear feedback shift register according to a polynomial; a first output arranged to collect one or more state values from a first group of elements of the shift register, the one or more state values from the first group forming a value of a first sequence; and a second output arranged to collect one or more state values from a second group of elements of the shift register, the one or more state values from the second group forming a value of a second sequence. No element of the second group belongs to the first group.

This disclosure relates to the technical field of automobiles and discloses an automobile key programmer applied to an automobile diagnostic instrument, wherein the automobile key programmer includes an activation coil, a first changeover switch, a second changeover switch, an infrared modulation circuit, an amplitude shift keying modulation circuit, and a frequency shift keying modulation circuit; when the first changeover switch is not powered on, the infrared modulation circuit provides a resonant voltage for the activation coil; when the first changeover switch is powered on and the second changeover switch is not powered on, the amplitude shift keying modulation circuit provides a resonant voltage for the activation coil; when both the first changeover switch and the second changeover switch are powered on, the frequency shift keying modulation circuit provides a resonant voltage for the activation coil; only one coil is required in the automobile key programmer to change voltages.

Systems and methods are disclosed herein for modifying modulated signals for transmission. The system receives a modulated signal comprising a speech signal and a carrier wave and generates first and second spectral signals by converting the modulation signal and carrier wave from the time domain to the frequency domain respectively. The system then determines spectral bands for the first and second spectral signals. For each spectral band, the system calculates a weighted spectral band value based on a magnitude of the first spectral signal within the spectral band and generates a modified spectral signal by modifying the second spectral signal with the weighted spectral band value. The system then converts the modified spectral signal from the frequency domain to the time domain and transmits the converted modified spectral signal to a server.

In described examples, a method of operating a transceiver with a transmitter and a receiver includes generating a frequency reference. In the transmitter: A phase locked loop (PLL) generates a first voltage controlled oscillator (VCO) control voltage responsive to the frequency reference. A VCO in the transmitter generates a transmitter VCO signal responsive to the first VCO control voltage, and the PLL is locked to the transmitter VCO signal. In the receiver: A signal is received. A receiver VCO generates a receiver VCO signal responsive to the first or a second VCO control voltage. The receiver VCO signal is multiplied by the received signal to generate an I component, and by the received signal phase shifted by 90° to generate a Q component. The second VCO control signal is generated responsive to the I component and the Q component.

In described examples, a method of operating a transceiver with a transmitter and a receiver includes generating a frequency reference. In the transmitter: A phase locked loop (PLL) generates a first voltage controlled oscillator (VCO) control voltage responsive to the frequency reference. A VCO in the transmitter generates a transmitter VCO signal responsive to the first VCO control voltage, and the PLL is locked to the transmitter VCO signal. In the receiver: A signal is received. A receiver VCO generates a receiver VCO signal responsive to the first or a second VCO control voltage. The receiver VCO signal is multiplied by the received signal to generate an I component, and by the received signal phase shifted by 90° to generate a Q component. The second VCO control signal is generated responsive to the I component and the Q component.