The circuit uses 3 DY336 low noise, high quality op amps. Among them A1 is used as the buffer follower of the input signal, in order to reduce the burden of the signal source. A2 and RPl form a negative feedback volume regulator. This volume adjustment method can reduce the distortion and noise caused by the change in RPl resistance. Compared with the conventional volume adjustment, the transient distortion is smaller due to the lack of integral effects caused by the RC constant. A3 and VTl and VT2 form an output stage, which works in a single-ended Class A state. Its single-ended output contains even-order harmonics, which makes the sound quality better, and the current drive of the transistor output is stronger. Force will also be more ideal. As shown in the figure, the circuit is one of the amplifier circuits in the front stage of the power amplifier (the other is the same)
We are the China leading Agents and suppliers of Medical Epidemic Preventive Materials, such as Medical Infrared Thermometer, forehead thermometer, Infrared forehead temperature detector, Infrared temperature tester,Infrared temperature instrument
We are specialized manufacturers from China, Infrared Thermometer, Medical Materials suppliers/factory, wholesale high-quality products of medical Epidemic Preventive materials R & D and manufacturing, we have the perfect after-sales service and technical support. Look forward to your cooperation!
Medical Infrared Thermometer
Medical Infrared Thermometer, forehead thermometer, Infrared forehead temperature detector, Infrared temperature tester Infrared temperature instrument
Shenzhen Daceen Technology Co., Ltd. , https://www.daceen-sz.com