滤波放大器 meaning in Chinese

filter amplifier

First and second band - gap filters amplify small signals and shift direct current voltage , which filter interference and noise by frequency . then , comparator restrains noise and interference through 700mv voltage window
两级带通滤波放大器对热释电红外传感器采集人体的微弱小信号进行交流放大和直流电平的转换,并根据频率对噪声和干扰进行过滤。
According to negative temperature coefficient of vbe and positive temperature coefficient of vt , a framework of band - gap voltage reference is investigated . the reference offer a source of pir , distributed three voltage , one as upper - threshold voltage of dual - threshold comparator , the other as lower - threshold voltage of comparator , the other as direct current voltage for second band - pass filter amplifier
同时利用pnp晶体管发射结电压的负温度特性和发射结差值电压的正温度特性设计了一个带隙基准电压源。此带隙基准电压源本身作为热释电红外传感器的电源电压,同时分压提供双限电压比较器的上限电平和下限电平以及第二级带通滤波放大器的直流电平。