8results about "Simultaneous amplitude and angle modulation" patented technology

A generator with a regeneration device. The electrosurgical generator according to the invention includes an oscillating circuit excited by means of an excitation circuit having a frequency preferably close to its resonant frequency, wherein the oscillation should be periodically interrupted. This can be done, for example, in situations where a pulse-pause modulation of a radio frequency voltage must be created, the fundamental frequency of which, for example, 350 kHz or 500 kHz, can be modulated with a modulation frequency of, for example, 50 kHz. To stop the oscillation in the generator's oscillating circuit as abruptly as possible without losing the energy stored in the oscillating circuit, a regeneration circuit is provided, implemented by means of a voltage multiplier circuit. Compared to a boost converter coupled inductor, it has the advantage of providing a low capacitive load to the oscillating circuit, especially because it is only electrically effectively connected to the oscillating circuit via a switch during the regeneration phase. This concept allows for efficient energy regeneration and therefore allows for precise amplitude modulation of the radio frequency voltage, particularly square wave modulation (on-off-switch).

The invention provides an electronic device and equipment, the electronic device comprises a first accumulator and N filtering modules, each filtering module in the N filtering modules comprises a plurality of branches, each branch in the plurality of branches comprises a phase adjusting unit and an amplitude adjusting unit which are coupled, and the output end of each filtering module is coupled with the first accumulator. For the first filtering module in the N filtering modules, the input end of the phase adjusting unit in the first filtering module is coupled with the input end of the electronic device; and for the ith filtering module in the N filtering modules, the input end of the phase adjusting unit in the ith filtering module is coupled with the output end of the phase adjusting unit in the (i-1) th filtering module. Thus, with the addition of the filtering modules, finer amplitude-phase adjustment can be realized, and thus the amplitude-phase equalization capability of the electronic device is improved.

The present electronic generator of modulated subcarrier pulse signals includes a module for modulating a pulse train, the position and amplitude of which are controllable, forming a switching signal; a switching module, connected to the output of the module for modulating the pulse train, including at least one transistor, controlled by the switching signal, a voltage-controlled frequency-locking oscillator having a frequency-locking band around a free oscillation frequency controlled by a control voltage, connected to the output of the switching module, the switching module making possible the injection of a periodic pulse signal having a frequency spectrum including at least one frequency line within the frequency locking band. Such arrangement makes it possible to obtain, at the output of the oscillator, frequency-controlled, phase-controlled and amplitude-controlled modulated subcarrier pulsed signals.

The application discloses a 1 / f noise suppression method for a particle detection system and a related device, and belongs to the field of photoelectric signal detection. The method comprises the following steps: acquiring a low-frequency voltage signal scattered by particles and a high-frequency carrier; mixing the low-frequency voltage signal based on the high-frequency carrier, shifting the frequency spectrum of the low-frequency voltage signal from low frequency to high frequency to suppress 1 / f noise, and then sequentially performing band-pass filtering and amplification to obtain a high-frequency voltage signal; and after sampling the high-frequency voltage signal through an analog-to-digital converter, mixing the high-frequency voltage signal with a first quadrature carrier generated by a local oscillator and performing low-pass filtering to synthesize a baseband signal. The application can suppress 1 / f noise and solve the problem of 1 / f noise reducing the signal-to-noise ratio of a micro-particle signal.

According to an example aspect of the present disclosure, there is provided a method for transmitting a Discrete Fourier Transform-spread-Orthogonal Frequency Domain Multiplexed. DFT-s-OFDM, signal, the method comprising, converting, by a wireless transmitter, complex-valued symbols to polar domain symbols, wherein the complex-valued symbols are modulated using at least phase shift keying, processing, by the wireless transmitter, angle values of the polar domain symbols to avoid angle differences larger than π rad, or lower than −π rad, between consecutive angle values, interpolating, by the wireless transmitter, at least the processed angle values by an interpolation factor N / L, wherein L is a length of Fast Fourier Transform, FFT, and Nis length of Inverse FFT, IFFT, converting, by the wireless transmitter, the interpolated angle values into complex domain symbols and generating, by the wireless transmitter, a DFT-s-OFDM waveform comprising said complex domain symbols.

An N-tap resistor network circuit is provided with a plurality of first resistors and a plurality of first taps, and generates a control voltage having one of a plurality of predetermined voltage values by selecting one of the plurality of first taps in accordance with an inputted digital control signal. An M-tap resistor network circuit is provided with a plurality of second resistors and a plurality of second taps, and generates a plurality of predetermined reference voltages at the plurality of second taps. Each of folding circuits generates an output signal based on differences between the control voltage and the plurality of reference voltages, the output signal having a signal level corresponding to a predetermined phase of a sine wave or a cosine wave.

The invention provides an amplitude modulation and phase modulation signal generation method based on a saturation power amplifier. The amplitude modulation and phase modulation signal generation method comprises the steps of generating four paths of baseband signals; the four paths of baseband signals are subjected to up-conversion to generate four paths of radio frequency signals; four paths of power radio frequency signals are generated after the four paths of radio frequency signals are respectively subjected to saturation power amplification; the four paths of power radio frequency signals are synthesized into one path of synthesized signal; and the synthesized signal sequentially passes through the attenuator and the down-conversion module and then enters the intermediate frequency sampling module for verification. According to the method, in a multifunctional integrated system of a radio frequency system, a saturation power amplifier of a conventional detection system can be used for generating amplitude modulation and phase modulation signals required by a communication function, and no extra equipment needs to be added; compared with an existing communication amplitude modulation and phase modulation signal generation method, the method can achieve larger EIRP.

The present application provides an electronic apparatus and device. The electronic apparatus comprises a first accumulator and N filter modules, each filter module among the N filter modules comprises a plurality of branches, each branch among the plurality of branches comprises a phase adjustment unit and an amplitude adjustment unit that are coupled, and an output end of each filter module is coupled to the first accumulator. For a first filter module among the N filter modules, an input end of the phase adjustment unit in the first filter module is coupled to an input end of the electronic apparatus; and for an i-th filter module among the N filter modules, an input end of the phase adjustment unit in the i-th filter module is coupled to an output end of the phase adjustment unit in an (i-1)-th filter module. In this way, as the number of filter modules increases, finer amplitude and phase adjustment can be achieved, thereby improving the amplitude and phase equalization capability of the electronic apparatus.