Abstract: An electromagnetic control device and a gas valve are provided. The electromagnetic control device includes a sealing head, a sleeve, a first regulating part and a second regulating part. The sealing head is fixedly connected with the sleeve, a part of the sealing head is located inside the sleeve; the sealing head includes a first internal threaded portion, and the first regulating part includes a first external threaded portion; the first regulating part further includes a second internal threaded portion, the second regulating part includes a second external threaded portion. The electromagnetic control device further includes a damping part, the damping part is arranged between a threaded connection structure between the first regulating part and the sealing head, and the damping part is connected to one of the first regulating part and the sealing head.

Abstract: The present invention describes a RF signal control method and device that adjusts the first down-converter gain attenuation and uses the adjusted first down-converter gain attenuation to change the RF signal. The RF signal control method and device also uses a determined linear filter parameter to perform linearity improvement on the digital signal after the RF signal goes through a down-converter and analog-to-digital converter. The RF signal control method and device use an increased up-converter gain attenuation value to correct the RF input signal after digital pre-distortion operation, so that the adjusted and/or improved signals after power amplification have better quality than the RF signal with just a simple analog-to-digital converter and clipping equipment. Thus, the current application improves the linearity effect of digital pre-distortion operation and the dynamic effect of the power amplifier operation, thereby promoting the coverage effect of the RF output signal.

Abstract: The present invention describes a RF signal control method and device that changes the gain attenuation in real time and uses the changed gain attenuation to adjust the RF input signal. The RF signal control method and device also uses determined linear filter parameters for linearity improvement on the digital signal that results from a down-conversion and analog-to-digital converter on the RF input signal. The adjusted and improved signal is output after a digital pre-distortion and power amplification operation. In comparison with existing technologies, the adjusted gain attenuation is used to make adjustment on the RF input signal and improve linearity the RF input signal such that the resulting RF signal has better quality. Thus, the current application improves the linearity effect of a digital pre-distorter and the dynamic effect of a power amplifier for the RF signal, thereby enhancing coverage of the RF output signal.

Abstract: The present invention describes a RF signal control method and device that changes the gain attenuation in real time and uses the changed gain attenuation to adjust the RF input signal. The RF signal control method and device also uses determined linear filter parameters for linearity improvement on the digital signal that results from a down-conversion and analog-to-digital converter on the RF input signal. The adjusted and improved signal is output after a digital pre-distortion and power amplification operation. In comparison with existing technologies, the adjusted gain attenuation is used to make adjustment on the RF input signal and improve linearity the RF input signal such that the resulting RF signal has better quality. Thus, the current application improves the linearity effect of a digital pre-distorter and the dynamic effect of a power amplifier for the RF signal, thereby enhancing coverage of the RF output signal.

Abstract: The present invention describes a RF signal control method and device that adjusts the first down-converter gain attenuation and uses the adjusted first down-converter gain attenuation to change the RF signal. The RF signal control method and device also uses a determined linear filter parameter to perform linearity improvement on the digital signal after the RF signal goes through a down-converter and analog-to-digital converter. The RF signal control method and device use an increased up-converter gain attenuation value to correct the RF input signal after digital pre-distortion operation, so that the adjusted and/or improved signals after power amplification have better quality than the RF signal with just a simple analog-to-digital converter and clipping equipment. Thus, the current application improves the linearity effect of digital pre-distortion operation and the dynamic effect of the power amplifier operation, thereby promoting the coverage effect of the RF output signal.