Buffer amplifier

Figure 1: Top: Ideal voltage buffer Bottom: Ideal current buffer

Figure 3. An op-amp–based unity gain buffer amplifier

Figure 4: Top: BJT voltage follower Bottom: Small-signal, low-frequency equivalent circuit using hybrid-pi model

A buffer amplifier (sometimes simply called a buffer) is one that provides electrical impedance transformation from one circuit to another. Two main types of buffer exist: the voltage buffer and the current buffer.

单词	Current buffer
释义	Current buffer 英语百科 Buffer amplifier A buffer amplifier (sometimes simply called a buffer) is one that provides electrical impedance transformation from one circuit to another. Two main types of buffer exist: the voltage buffer and the current buffer.
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Current buffer

Buffer amplifier