Abstract: A phase-locked loop (PLL) and a method for calibrating a VCO therein are provided. The PLL comprises a frequency-phase detector, a charge pump, a loop filter, a VCO, a divider and a calibration circuit. The calibration circuit is used to acquire a frequency of an output signal of the VCO, to calibrate the frequency of the output signal according to an expected frequency, and to acquire frequency control parameters of the VCO at the current signal frequency. The amplitude and gain of the output signal are kept constant according to the amplitude control parameters and gain control parameters. The PLL can meet the demands on frequencies of multiple protocols and can adaptively look up and stabilize the suitable frequency. It solves the issue that the amplitude of the output signal of the VCO is not constant when the PLL operates in a large frequency range.

Abstract: The present disclosure provides a wireless power supply communication circuit for an electric cooking pot, an electric cooking pot and a method thereof. The electric cooking pot comprises a pot body, an upper cover and the wireless power supply communication circuit, wherein an insertion base is provided on the pot body; an insertion cavity is provided on the upper cover; the insertion base is movably inserted the insertion cavity cooperatively; a first coil is provided on the insertion base, a second coil resonance circuit is provided in or near the insertion cavity; a pot body control unit is provided on the pot body, an upper cover control unit is provided on the upper cover. The present disclosure allows the information interaction by detecting the amplitude changes of the resonant wave, so that the wireless power supply and communication can be simultaneously provided.

Abstract: A power supply system includes a wireless power supply end and a wireless receiving end. The wireless receiving end includes a resonant receiving component and a rectifying and voltage-stabilizing component that is connected to the resonant receiving component to output a voltage-stabilized power supply (VCC). A load sudden-change protection circuit includes an overvoltage protection component and an under-voltage protection component that are each respectively connected to the voltage-stabilized power supply and a load. The overvoltage protection component turns on the load when the voltage of the voltage-stabilized power supply is higher than a first preset voltage due to sudden turn-off of the load. The under-voltage protection component turns off the load when the voltage of the voltage-stabilized power supply is lower than a second preset voltage due to sudden turn-on of the load.

Abstract: The present disclosure discloses a method for controlling an electromagnetic heating system, including: obtaining a target heating power of the electromagnetic heating system; determining whether the target heating power is less than a preset power; and when the target heating power is less than the preset power, controlling, in each control period, a resonance circuit of the electromagnetic heating system to enter into a discharging stage, a heating stage, and a stop stage successively, in which in the discharging stage, a power switch transistor of the resonance circuit is driven by a first driving voltage such that the power switch transistor works in an amplification state. In this way, a pulse current of the power switch transistor may be restrained, and a low power heating is realized by using a heating mode with a millisecond duty ratio. The present disclosure further discloses a device for controlling an electromagnetic heating system and an electromagnetic heating system.

Abstract: Disclosed are a pot cover assembly and a cooking utensil having same. The pot cover assembly comprises a pot cover body and a spill-proof detection device. The spill-proof detection device is a capacitive detection device and it is provided on the pot cover body. At least a lower surface of the spill-proof detection device forms a detection plane and a capacitance value of the spill-proof detection device is changed as a function of a contact medium of the detection plane.

Abstract: The present disclosure provides a method for controlling a power of an electromagnetic cooking appliance and an electromagnetic cooking appliance. The method for controlling the power includes the following steps: obtaining a target power of the electromagnetic cooking appliance; determining a heating period of the electromagnetic cooking appliance based on the target power, in which, each heating period includes at least one heating time period; in each heating time period, controlling a power switch corresponding to the first coil disk with a first control pulse, and controlling a power switch corresponding to the second coil disk with a second control pulse, to make the first coil disk and the second coil disk heat simultaneously with different powers, in which, when the first coil disk and the second coil disk heat simultaneously.

Abstract: The present disclosure provides a method for controlling a power of an electromagnetic cooking appliance and an electromagnetic cooking appliance. The electromagnetic cooking appliance includes a first coil disk and a second coil disk. Each of the first coil disk and the second coil disk corresponds to an independent resonance circuit. After obtaining a target power of the electromagnetic cooking appliance, a heating period of the electromagnetic cooking appliance is determined based on the target power, each heating period including at least one first heating time period and at least one second heating time period. The first coil disk is controlled to heat in the first heating time period, and the second coil disk to heat in the second heating time period, such that the first coil disk and the second coil disk are heated alternately to reduce an interference of harmonic current and voltage flicker.

Abstract: Disclosed are a method and an apparatus for detecting macro viruses. The method includes: if a data file processing program has already performed an opening operation on a target data file but has not yet performed a loading operation on a content of the target data file, calling a macro virus detecting module registered previously as a plug-in of the data file processing program; detecting the target data file by using the macro virus detecting module. Applying the embodiment of the present disclosure, the macro virus detecting module may identify the format of all data files and may perform the internal analysis of the data files, thus improving the coverage of the detected data files.

Abstract: Disclosed are an electromagnetic heating device and a heating control circuit thereof, and a low power heating control method. The heating control circuit comprises: a voltage zero-crossing detection unit for detecting a voltage zero-crossing signal of an alternating current power source; a resonance heating unit; a rectification and filtering unit; a power switch tube; a drive unit, connected to a drive end of the power switch tube to drive the power switch tube to be turned on and off; a drive voltage transformation unit, connected to the drive end of the power switch tube to change a drive voltage of the power switch tube; and a main control unit for controlling the power switch tube to operate under the drive of a first drive voltage according to the voltage zero-crossing signal, thereby reducing the damage risk of the power switch tube and reducing turn-on noises.

Abstract: Disclosed are an electromagnetic heating device and a heating control circuit thereof, and a low power heating control method. The heating control circuit comprises: a voltage zero-crossing detection unit for detecting a voltage zero-crossing signal of an alternating current power source; a resonance heating unit; a rectification and filtering unit; a power switch tube; a drive unit, connected to a drive end of the power switch tube to drive the power switch tube to be turned on and off; a drive voltage transformation unit, connected to the drive end of the power switch tube to change a drive voltage of the power switch tube; and a main control unit for controlling the power switch tube to operate under the drive of a first drive voltage according to the voltage zero-crossing signal, thereby reducing the damage risk of the power switch tube and reducing turn-on noises.

Abstract: The present disclosure provides a wireless power supply communication circuit for an electric cooking pot, an electric cooking pot and a method thereof. The electric cooking pot comprises a pot body, an upper cover and the wireless power supply communication circuit, wherein an insertion base is provided on the pot body; an insertion cavity is provided on the upper cover; the insertion base is movably inserted the insertion cavity cooperatively; a first coil is provided on the insertion base, a second coil resonance circuit is provided in or near the insertion cavity; a pot body control unit is provided on the pot body, an upper cover control unit is provided on the upper cover. The present disclosure allows the information interaction by detecting the amplitude changes of the resonant wave, so that the wireless power supply and communication can be simultaneously provided.

Abstract: Disclosed are a method and an apparatus for detecting macro viruses. The method includes: if a data file processing program has already performed an opening operation on a target data file but has not yet performed a loading operation on a content of the target data file, calling a macro virus detecting module registered previously as a plug-in of the data file processing program; detecting the target data file by using the macro virus detecting module. Applying the embodiment of the present disclosure, the macro virus detecting module may identify the format of all data files and may perform the internal analysis of the data files, thus improving the coverage of the detected data files.

Abstract: A method for uplink burst equalization in broad wide access system, using the form of combining pre-training and burst equalization, that is, before transmitting user data, training the equalizer, then starting transmitting user data, in which, the equalizer uses decision user data as reference to track the changed wireless channel; if the change of channel exceeds the tracking region of equalizer, for example, the error rate exceeds threshold 1 but doesn't exceed threshold 2, the burst equalization will be performed; if the channel change exceeds the equalization region of equalizer, for example, the error rate exceeds threshold 2, the training will be performed again.

Abstract: A method for uplink burst equalization in broad wide access system, using the form of combining pre-training and burst equalization, that is, before transmitting user data, training the equalizer, then starting transmitting user data, in which, the equalizer uses decision user data as reference to track the changed wireless channel; if the change of channel exceeds the tracking region of equalizer, for example, the error rate exceeds threshold 1 but doesn't exceed threshold 2, the burst equalization will be performed; if the channel change exceeds the equalization region of equalizer, for example, the error rate exceeds threshold 2, the training will be performed again.