北极星JD-11W电子镇流器电路

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http://circuit.eeworld.com.cn/view/3334/ 发布时间: 1970-01-22



TMS320LF2407DSP典型用户板原理图(PROTEL99原理图)

该原理图来自某国内DSP推广公司的PDF文档 在我要求下该公司仅提供PDF文件,让我白花2天时间建库绘图,现提供给有兴趣的朋友参考。 PROTEL99原理图(F2407.ZIP)同时上传 F2407.zip ...

http://circuit.eeworld.com.cn/view/3316/ 发布时间: 1970-01-22



音频控制和软开关的放大器

The soft switching is enabled by a BD131 transistor wired as a switch in emitter follower configuration. The collector is wired to a permanent supply voltage, the 2H series inductor serves only to filter out power supply hum. This inductor is not too important and may be omitted if the DC supply...

http://circuit.eeworld.com.cn/view/3786/ 发布时间: 1970-01-22



门禁电话通话电路

In this doorphone circuit,an 8 ohm speaker is used both as a microphone and also an output device. The BC109C stage amplifies in common base mode, giving good voltage gain , whilst providing a...

http://circuit.eeworld.com.cn/view/3698/ 发布时间: 1970-01-22



音频控制和软开关的放大器

The soft switching is enabled by a BD131 transistor wired as a switch in emitter follower configuration. The collector is wired to a permanent supply voltage, the 2H series inductor serves only to filter out power supply hum. This inductor is not too important and may be omitted if the DC supply is ...

http://circuit.eeworld.com.cn/view/8276/ 发布时间: 1970-01-22



立体声驱动器

This preamplifier has a low output impedance, and is designed to drive long cables, allowing you to listen to a remote music source without having to buy expensive screened cables. The very low output impedance of around 16 ohms at 1KHz, makes it possible to use ordinary bell wire,loudspeaker or ala...

http://circuit.eeworld.com.cn/view/8101/ 发布时间: 1970-01-22



门禁电话通话电路

In this doorphone circuit,an 8 ohm speaker is used both as a microphone and also an output device. The BC109C stage amplifies in common base mode, giving good voltage gain , whilst providing a low...

http://circuit.eeworld.com.cn/view/7977/ 发布时间: 1970-01-22




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