1394AM04 N-270
1394AM04 N-270
1394AM04 N-270
当触摸笔靠近LCD时，触摸检测器获得感应信号，经过电子开关及信号处理电路后，再对信号进行整流。触摸信号整流电路如图5所示。触摸信号由TOUCH_SIN输入，经过二极管D整流。图中CONTROL与HT460RB70的PC4引脚相连接， HT460RB70通过PC4引脚控制三极管的导通状态，通过电容充放电直接影响整流后的波形，使其更加准确。信号整流后还需经过一个同相放大电路，然后从SIN发送到HT460RB70单片机PCO/INT引脚。在Multisim中对触摸电压信号整流电路的仿真结果如图6所示，图中信号SIN是处理后的信号波形。其结果表明，通过整流后得到平滑稳定的直流电压信号，有利于提高A/D转换的精度。
＆ 公司全称 ： 厦门泰尼电气有限公司
＆ 销售代表 ： 小黄
＆ 洽谈电话 ：
＆手机：
＆ 商务 QQ ： 2917675397
＆ 传真（FAX)： （请注明，01006收）
＆ 公司地址 ： 厦门市海沧区海沧街道滨湖一里7号
＆ 公司网址 ： www.xmtaini.com
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