外文翻譯--智能競(jìng)賽搶答器-資料下載頁(yè)
2025-08-22 17:14本頁(yè)面
【正文】 installed in a closed box package. In order to achieve reliable function call, we increased the levels for signal amplification repeater after the realization of functions and the repeater are talking about here is our web site to introduce highpower wireless signal repeater. The above examples illustrate, the wireless device to send and receive a straight line better transmission performance, and performance will greatly reduce the diffraction.Wireless Receiver Module1 super renewable detector receiver Super Renewable detector circuit is actually a by intermittent oscillation control of highfrequency oscillator, the highfrequency oscillator using threepoint capacitance oscillator, oscillation frequency and the transmitter frequency of the firing line. And intermittent oscillation is the oscillation in the highfrequency oscillations generated by the process, which in turn controls the highfrequency oscillator and intermittent oscillations. And intermittent oscillation frequency is determined by the parameters of the circuit (usually a hundred to a few hundred kHz). The low frequency of elections, and better antiinterference performance of the circuit, but the lower receiver sensitivity, on the contrary, the high frequency of elections, a better receiver sensitivity, but the antiinterference performance variation. Renewable detection circuit has high gain, in the absence of control signals received, due to spurious signals from outside interference and disturbance of thermal circuit itself, produce a unique noise, called ultranoise, the noise frequency range for between ~ 5kHz, sounds like a waterlike whisper sound. In the absence of signals, ultrahighlevel noise, amplified by the filter output noise voltage。 when a control signal arrives, the circuit resonant, super noise was suppressed, began to produce highfrequency oscillator oscillation, the output signal. Highlevel circuit ponents Renewable related detector circuit, the control signal detected by the zoom level to deal with operational amplifier from the output signal output to a wireless receiver.2 Super heterodyne receiver demodulation receiverSuper heterodyne receiver circuit and the general working principle of the super heterodyne radio the same principle. Received signal will be magnified, and to generate the local oscillation signal amplitude of the subtraction, resulting in a fixed frequency IF signal, the IF signal contains lowfrequency amplitude modulation control signal to the IF signal to two or threelevel amplification, detection and then to intermediate frequency signals contained in the lowfrequency information taken out instructions on the correct remote control signal. As the IF amplifier with automatic gain control loop, so it can design very high gain and regulator work, making both super heterodyne receiver signal or weak signal, can do basically the same as the amplification multiples, but also because the use of the IF amplifier, and its signal can reach a large magnification, it is the circuit greatly enhance the receiver sensitivity is generally up to about , and the detector circuit super Renewable pared super heterodyne receiver module, in terms of receiver sensitivity, or selectivity have greatly improved in significantly more interference.
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