【摘要】 介绍一种利用PICF73单片机结合数字电位器X9313 WP、键盘扫描及继电器控制,从而实现程控增益放大器(10 dB~60 dB,步进10 dB)以及高通、低通程控滤波器(其-3 dB截止频率fc在1~20kHz范围内可调,调节频率步进为1 kHz)的设计。该程控增益放大器及滤波器,为如何实现数字化控制提供良好的借鉴作用。更多还原

【Abstract】 A PIC MCU with the use of a combination of digital potentiometers X9313WP,keyboard scanning and control relays.In order to achieve program-controlled amplifier(10dB～60dB,Step 10dB) and high-pass,low-pass program filter(The-3dB cut-off frequency fc in the range of 1kHz~20kHz,adjustable to regulate the frequency step to 1kHz).It is simple,clear method and practical.The test results are satisfactory.It has a strong engineering practice and reference value.For how to achieve digital control to provide a good reference.更多还原