STK6303 combined power amplifier circuit diagram based on high quality switch regulated power supply

Probe domestic switch needle KG-300K needle head diameter is 3.0mm normally open switch needle

MOS power IC full range

Photocoupler

STK6303 high-power thick-film integrated circuit, its power supply voltage can reach up to Sov, the output current can reach up to loA, the single-chip circuit in the regulated power supply 36V, can get the sinusoidal power of loOw, the circuit principle is shown in Figure 3-51 The t-power amplifier part was built by Japan Sanyo Co., Ltd. The AD712 in the circuit is a negative feedback type volume control. Its advantage is that it is a high-quality gain-adjustable (O~l0 times) pre-stage, adopting a line potentiometer, high balance, and no control process. Noise, very practical, worth promoting. As the pusher stage of thick film circuit STK6303, NE5532 is a quasi-II two mode. The gain of this stage is about 15 times. The input sensitivity of the power amplifier is 300mV, and the impedance is about lkkt. It can adapt to various common signal sources (of course, pay attention to impedance matching). Wait).