The price of reject is bigger than 80dB, their consumption is small, from 11 until 3 mA. They are internally sold in nutshell with eight pins and allocate two operational amplifiers, In the same line in nutshell 14 pins they incorporate four operational, In the trade they are sold with code TL074, TL084 and TL064, In nutshell with eight pins they are sold operational amplifiers TL061 TL071 kajTL081. In the manufacture we used the TL082 that has two operational. First operational from the TL082 it works as amplifier and mixed for the two channels, In his negative entry he exists>The place of runner is proportional with the aid of circuit. The second operational amplifier is the filter of manufacture. The filter of is acoustic frequency of second class and he is made with the materials that are round the operational amplifier. The filter of is low passage with variable frequency of cutting off. This frequency can be altered and take prices from very low frequency the 30Hz or still exceed 150Hz. The frequency of cutting off of filter depends from the prices that have the elements of circuit. Altering the values of elements we can have frequency of cutting off 150Iz, 130Iz, J00Iz, 7Ïz, 6Íz even 3Íz, this prices they can be achieved with the simple rotation of double potentiometer. The circuit of filter has been made around>Manufacture Parts R1 = 39 Kohm R2 = 39 Kohm R3 = 47 Kohm R4 = 10 Ohm R5 = 22 Kohm R6 = 4,7 Kohm R7 = 22 Kohm R8 = 4,7 Kohm R9 = 10 Ohm R10 = 220 Ohm C1 = 39 pF C2 = 0.1 uF C3 = 0.1 uF C4 = 0.2 uF C5 = 0.4 uF C6 = 0.1 uF C7 = 0.1 uF IC1 = TL064 
In order to you make the manufacture you will need printed that appears in the form. In this you will place the materials according to the following form. The materials are enough also easy can become certain errors. With few attention however you can him avoid. If they are presented difference malfunctions, you check carefully the circuit. The circuit, as we said, is filter and it should they are used materially good precision and quality, particularly for the capacitors. The capacitors of filters will have tolerance 5%. Of course, the manufacture will also work with material of lower quality, the trial of manufacture can become with acoustic signal of generator We apply the generator in the entry of manufacture and we measure with a voltmeter the tendency in the exit of filter. If we alter the potentiometer and are altered the tendency, then all have well.
[稳压电源]供应AP2402三功能切换模式带过温保护 本帖最后由 QQ3004893308 于 2018-4-28 16:16 编辑 ⑴ AP2402是一款PWM工作模式,高效率、外围简单、内置功率管的高精度降压 LED 恒流驱动芯片。 ⑵ AP2402输出功率可达15W，大电流1.5A。 可实现三段功能切换，全亮/半亮/爆闪循环模式。 ⑶ AP2402 工作频率固定在 150KHZ 左 右，同时内置抖频电路，能够降低对其他设备的 EMI干扰。 另外采用平均电流采样 模式，能够提高宽输入电压情况下的电流精度。 ⑷ AP2402 带有输 UPS蓄电池常用维护技巧 4月08日 第三届·无线通信技术研讨会 立即报名 12月04日 2015•第二届中国IoT大会 精彩回顾 10月30日ETF•智能硬件开发技术培训会 精彩回顾 10月23日ETF•第三届 消费 基于FPGA的无线信道模拟器设计 随着人们对无线通信需求和质量的要求越来越高，无线通信设备的研发也变得越来越复杂，系统测试在整个设备研发过程中所占的比重也越来越大。为了更加方便地对所设计的系统进行调试和测试，无线信道模拟器是进行无线
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