High gain dynamic microphone preamplifier

Crystal oscillator
Photocoupler
High gain dynamic microphone preamplifier

The mic preamp has an audio gain of over 70 decibels. The gain is approximately equal to the load resistance of the two transistors generated by the HFE to the preamplifier input resistivity. These resistor values ​​(≈2~5kΩ) are usually very similar and are suitable for most applications, so this ratio can be used consistently.

Screen Protector For Huawei

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