| 1. | 1mhz ac signal for testing small capacitor and inductor
信号源，可精确量测小电容小电感 |
| 2. | 1mhz ac signal for testing very small capacitor and inductance
完整测试报表及测试统计资料，资料可自动储存，断电时不致遗失 |
| 3. | This instrument can measure ac signal frequency either of the single phase voltage or of the tri - phase voltage
本表既可测交流单相电压信号之频率，亦可测交流三相电压信号之频率。 |
| 4. | Through discussing the samples of ac signal , the basic method to solve spectrum leakage is pointed out , which is to guarantee the same pace between signal frequency and sampling frequency
通过对交流电信号采样的讨论，指出解决频谱泄漏的问题的基本方法是保证信号频率与采样频率同步。 |
| 5. | The instrument is made up of an oscillating detector , which converts the distributed voltage of an insulator to ac signal for further treatment , a singlechip - microcomputer unit and a speaker system
仪器采用振动式探头，把绝缘子的直流电压变成交流信号，处理后，语音直接报出绝缘子的电压值。 |
| 6. | To improve the performance of the system , some methods are introduced , such as photoelectric brightness modulating , amplification of the photoelectric ac signal and filter design . the circuitry of the demodulator is also presented . this work lays solid foundation for the future system integration
最后，介绍了数字式加速度计的参考电路设计，其中重点介绍了数字式再平衡回路的设计，包括脉宽调制、恒流源、极性开关等电路的设计。 |
| 7. | In view of numerous digital and analog signals need to be processed , and the difficulty of real - time processing of multi channel 400 hz ac signal , vhdl ( vhsic hardware description language ) is applied to design the digital circuit , which is successfully realized in field programmable gates array ic - xc2s100
针对i o模块中需要处理的数字量和模拟量较多的事实，以及多路400hz信号的实时处理较为繁重的现状，作者采用了现场可编程门阵列( fpga )加以解决。 |
| 8. | In this paper they study a position - detecting system based on microprocessor and psd ( position sensitive detector ) . the method is as follows : when the ac - signal from psd which is illuminated by modulated light source passes through an active band - pass analog filter , it filters the ac signal which represents the object light source . then the dc - converter circuit transforms it into dc - signal which is used to calculate the position
这一系统采用的方法是通过对位置敏感探测器psd受到调制目标光源照射后输出的模拟交流信号进行有源带通滤波，提取出代表目标光源的调制频率成份，再将该信号转变为用来参与位置解算的直流信号，然后选用单片机组成硬件电路，对直流信号进行采集处理并与计算机建立通信，把数据送入计算机进行位置解算，分析判别目标光源和psd器件的相对位置。 |
