Albert Charles Bartlett was an electrical engineer working for the General Electric Company in Wembley. He had some correspondence with Wilhelm Cauer on the subject of filter designs.
He published a treatment of geometrically symmetrical 2-port networks in 1927 and is responsible for Bartlett's bisection theorem which shows that any symmetrical network can be transformed into a symmetrical lattice network.
He also patented the idea of using the method of an active amplifier with "negative resistance" to cancel the inductance of a telephone line.
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