The SF404 audio power amplifier driver circuit is a product of Shanghai Radio 7 Factory. It can be equipped with a pair of power tubes and a small number of RC components. It can be an OTL or BTL power amplifier. The power amplifier composed of this circuit has a wide power supply voltage range and output. power This article refers to the address: http:// When the semiconductor diode is turned on, it is equivalent to the switch closing (circuit is turned on), and when it is turned off, it is equivalent to the switch opening (circuit cut), so the diode can be used for switching, and the commonly used model is 1N4148. Since the semiconductor diode has a unidirectional conduction characteristic, the PN junction is turned on under a positive bias, and the resistance in the on state is small, about several tens to several hundreds of ohms; in the reverse bias, it is off. The resistance is very large. Generally, the silicon diode is above 10 Μ Ω, and the bismuth tube is also several tens of kilo ohms to several hundred kilo ohms. With this feature, the diode will act as a control for the current to turn on or off in the circuit, making it an ideal electronic switch. Switching Diode,1N4148 Signal Diode,4148 Diode,1N4148 Diode Dongguan Agertech Technology Co., Ltd. , https://www.agertechcomponents.com
