2results about How to "Not destroyed" patented technology

This invention provides a power amplifier with improved bias following performance. An ADC converts the measured analog voltage into digital data, which is then fed into a DSP. The DSP acquires the signal and performs model matching with a pre-established power amplifier stage bias model to detect overload trends and whether the power amplifier is about to exceed the bias linearity range. This determines whether to adjust the power amplifier bias. If a strong overload trend (short circuit) is detected, the final stage of the power amplifier is shut down promptly. For stages exceeding the bias lead region (Class A region), a certain degree of overfit compensation is applied, ensuring the power amplifier stage remains in the high linearity region while reducing fixed bias current and power consumption, thus protecting the equipment. This invention solves the problem of large dispersion and poor bias following performance in traditional power amplifiers using analog bias. It employs a high-speed sampling and signal processing loop to improve bias following performance while effectively protecting the circuit from damage.

This invention relates to a pretreated reinforced recycled aggregate concrete and its preparation method, comprising the following raw materials: 320-360 parts cement; 20-40 parts fly ash; 80-120 parts mineral powder; 585-670 parts manufactured sand; 1050-1200 parts recycled coarse aggregate; 156-172 parts water; and 11-12.3 parts admixtures. After pretreatment, the concrete prepared from the recycled coarse aggregate exhibits significantly improved performance compared to the untreated recycled coarse aggregate. The synergistic effect of multiple pretreatment methods significantly improves the water absorption, crushing index, and apparent density of the raw coarse aggregate. Pretreatment of the recycled coarse aggregate provides enhanced conditions for internal hydration in the recycled concrete and simultaneously improves the surface roughness of the recycled coarse aggregate, thus enhancing the workability and increasing the strength of the concrete.