High input impedance buffer amplifier
Source: InternetPublisher:张小哥 Keywords: buffer amplifier high input impedance common collector gate Updated: 2021/08/28
High input impedance buffer amplifier
Shown is a high input impedance buffer amplifier using a common collector amplifier structure . The first stage uses a common drain structure
FET amplifier, and the second stage uses a common collector structure emitter follower. It is actually a circuit composed of two buffer amplifiers . Has a high
current amplification factor. Two AC negative feedback channels (island, Cj) are set up at the output end to feed the output signal back to the gate and drain of VT1, thus
improving the frequency characteristics of the amplifier.
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