LED Epitaxial Factory said that since the end of December last year, orders for large-size panels have gradually increased. It is estimated that the overall order performance in the first quarter of this year will be w…
In 2011, China's photovoltaic industry, which has developed rapidly f…
On November 18, 2009, the “2009 LED Industry Development International Cooperation Forum†co-sponsored by the Economic Information Department of China Council for the Promotion of International Trade and China Trade News was succes…
Sony took the lead in opening the grain store in Japan last weekend, officially released a new generation of powerful quad-core handheld PS Vit…
Structure of passive infrared alarm
1 Structure
Passive infrared alarm is mainly composed of optical system, pyroelectric infrared sensor, signal filtering and amplification, signal processing and alarm circuit. Its block diagram is shown in Figure 2. In the fi…
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This paper proposes a DSP-based digital closed-loop power amplifier control system to determine the optimal step size of the output power rise or fall by detecting the forward and reverse power voltage, increase or decrease the output power of the power amplifier accor…