Low-noise pre-amplifier
A preamplifier and amplifier technology, applied in the direction of improving the amplifier to reduce the impact of noise, etc., can solve the problems of being easily interfered by high-frequency sound signals, high energy consumption, complex structure, etc., to achieve improved anti-interference, low energy consumption, The effect of simple structure
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[0009] The present invention will be further described below in conjunction with accompanying drawing:
[0010] Such as figure 1 As shown, a low-noise preamplifier of the present invention includes a power supply E, a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, and a seventh resistor R7, eighth resistor R8, ninth resistor R9, tenth resistor R10, eleventh resistor R11, first capacitor C1, second capacitor C2, third capacitor C3, fourth capacitor C4, fifth capacitor C5, sixth Capacitor C6, seventh capacitor C7, eighth capacitor C8, ninth capacitor C9, first N-channel field effect transistor Q1, second N-channel field effect transistor Q2 and integrated operational amplifier IC, the positive pole of the power supply E and the first resistor R1 The first terminal of the power supply E is connected to the first terminal of the fifth resistor R5, and the second terminal of the first resistor R1 is res...
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