Design receiver circuit using ZN414 and LM386 integrated chips
Source: InternetPublisher:常思一二 Updated: 2020/05/14
LM386 is an audio integrated power amplifier with the advantages of low power consumption, adjustable voltage gain, wide power supply voltage range, few external components and low total harmonic distortion. It is widely used in recorders and radios. LM386 is an audio power amplifier produced by National Semiconductor and is mainly used in low-voltage consumer products. To minimize external components, the voltage gain is built in at 20. However, by adding an external resistor and capacitor between pins 1 and 8, the voltage gain can be adjusted to any value, up to 200. The input terminal is position-referenced, while the output terminal is automatically biased to half of the power supply voltage. At a 6V power supply voltage, its static power consumption is only 24mW, making the LM386 particularly suitable for battery-powered applications.
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