-
cheng
滤波器广泛应用于数字信号处理、通信、自动控制领域,但设计可变宽频带有源滤波器则比较困难。利用单片机控制参数可编程的双二阶通用开关电容有源滤波器,精确设置有源滤波器的中心频率f，品质因数Q及有源滤波器的工作方式。本系统主要分为两个部分:即程控滤波器和程控放大器。程控放大器电压增益为40dB，通过单片机控制DA进行分压，可精确实现要求的10dB步进，误差小于0.5 ，通带为100Hz-500KHz，输入电压峰－峰值范围为10mV，在输入范围内无明显失真。由MAX264为核心的滤波器，可设置为高通、低通滤波器。通过单片机直接给出控制频率，使-3dB截止频率在1KHz-20KHz内可调，步进1KHz，误差小于1 。整个系统以52单片机为控制核心，电路简单，性能稳定，且具有较高精度，滤波参数调节通过单片机控制，较为方便。(Filters are widely used in digital signal processing, communications, automatic control area, but the design variable wideband active filter is more difficult. Control parameters using single-chip programmable universal switched-capacitor biquad active filter, active filter accurately set the center frequency f, quality factor Q and the active filter works. The system is mainly divided into two parts: the program-controlled filters and programmable amplifiers. Programmable amplifier voltage gain of 40dB, the DA through the partial pressure of single-chip control, can accurately achieve the required 10dB step, the error is less than 0.5 , passband to 100Hz-500KHz, input voltage peak- the range of 10mV, the input range no significant distortion. By the MAX264 as the core of filter can be set to high pass, low pass filter. Given directly by the microcontroller controls the frequency, the-3dB cutoff frequency at 1KHz-20KHz adjustable, step 1KHz, error is less than 1 . The entire system for)
- 2011-07-17 16:23:27下载
- 积分：1
-
debug
AVR智能温度控制，基于ATmega16(intelligent temperature control of AVR)
- 2014-07-19 11:35:52下载
- 积分：1
-
audio-capture-raw-_console
利用kinect获取原始的音频波形，得到四声道的pcm波形。(Use kinect to get the original audio waveform, get pcm waveform four channels.)
- 2021-01-29 14:18:35下载
- 积分：1
-
04Clock
时钟显示,在实验二的作业里面，希望对大家有用，能够帮助到大家(show the time.)
- 2013-03-04 15:07:06下载
- 积分：1
-
STC12C5A60S2
STC12C5A60S2电子负载全部代码,TM7705做AD TM8211做DA(STC12C5A60S2,TM7705AD TM8211DA)
- 2015-08-22 12:35:21下载
- 积分：1
-
DrawLine
实现坐标的显示 随机数产生 并显示到listctrl中 声称坐标轴 显示随机数，排序(
Achieve coordinate display random number is generated and displayed to listctrl claimed axis shows random numbers, sorting)
- 2013-11-08 20:38:32下载
- 积分：1
-
12864
点阵液晶屏的参考程序，内置菜单动能，大家可以研究一下(Dot matrix LCD screen reference program, built-in menu kinetic energy, we can look)
- 2011-11-11 18:53:23下载
- 积分：1
-
Proteus_PWM_Boost_circuit
proteus仿真，以LPC2138芯片为核心生成PWM波，控制升压斩波电路（PWM），实现稳定的高电压输出。包含AD转换、串口通信。(proteus simulation. This design use PWM wave generated by LPC2138 to control boost circuit and realized a steady high voltage output. ADC and serial port communication are involved in the design.)
- 2021-04-06 23:19:02下载
- 积分：1
-
uDisk_WM_DEVICECHANGE
通过WM_DEVICECHANGE来检测u盘的传播者源代码(through WM_DEVICECHANGE to detect u site promoters source code)
- 2006-12-23 08:18:11下载
- 积分：1
-
Mypro
基于atmel studio 6，使用avr128单片机，实现超市导购机器人编程，直流电机结合颜色传感器实现自动巡线，5个舵机，3个自由度(Based on atmel studio 6, using avr128 microcontroller, to achieve the supermarket shopping guide robot programming, combined with the color sensor DC motor automatic transmission line, 5 servos, three degrees of freedom)
- 2013-09-28 22:44:36下载
- 积分：1
