Microphone amplification and mixed value amplification circuit diagram
The power amplifier can be composed of discrete components or an integrated power amplifier. The former is often used in high-power or higher-demand audio systems, the latter is often used in low-power or less demanding audio systems. In addition to the characteristics of light weight and small size, the integrated power amplifier only needs few external components and can work without adjustment. Therefore, it is widely used in audio equipment such as radios, recorders, and televisions. The use of integrated power amplifier should pay attention: in any case, the integrated power amplifier can not work under the working conditions specified by the limit parameters or absolute ratings. Even if the working state of the circuit exceeds the limit parameter value instantaneously, it may cause immediate damage to the circuit or degradation of the electrical performance of the circuit.
Microphone amplifiers are small-signal low-noise amplifiers, which are commonly used in discrete component circuits. In order to reduce noise, the general operating point is selected to be low, and the design method is the same as that of general amplifiers. Low-noise operational amplifiers can also be used, and non-inverting amplifiers with high input impedance can be used. The circuit is shown in the figure:
Cylinder radiator
Also called oil-filled heater. This heater is filled with a new type of heat transfer oil, when connected to power, the heat pipe around the heat transfer oil is heated, and then along the heat pipe or loose pieces of heat will be distributed out. When the oil temperature reaches 85 ℃, the temperature control element that is self-power. This kind of heater heat transfer oil without replacement, long life, the price is generally between 400 to 500 yuan. Suitable for use in the living room, bedroom, aisle and the elderly and children's family, with safety, health, clean, tasteless advantages. The disadvantage is the slow heat dissipation, power consumption more. Oil bath heat sink has 7, 9, 10, 12, etc., can be selected by the size of the heat sink to the size of the power, the use of power in 1200 watts or so.
Mica Heater
Mica Heater, Infrared Panel Mica Heater, Steel Panel Radiator
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