Build a Buffer Amplifiers Circuit Diagrams

How to build a buffer amplifiers circuit diagrams. A buffer amplifier is one that provides electrical impedance transformation from one circuit to another. These two buffer/amplifiers that have been successfully used with VFOs: one (shown in A) is based on a pair of bipolar npn transistors, and the other (shown in B) is built around a dual-gate MOSFET.

Buffer Amplifiers Circuit Diagrams