|Oscillator Circuit Thirteen can be used to build a Linear Travel Position
S. S. Patent 3,474,332 www.luetzow.us File:3474332.jpg
Oscillator Circuit Thirteen is a push-pull oscillator. If the two 50 uH inductors
are changed by +/- 25 uH so one will be 25 uH while the other is 75 uH, a +/-
One Volt differential will be developed at the meter terminals.