Completely transistorized strain gage oscillator

Described is a completely transistorized strain gage oscillator (S.G.O.). Its primary use is in conjunction with a resistive-type strain bridge transducer to furnish a frequency modulated signal that is directly proportional to an applied force such as stress or pressure. It is expected that due to desirable characteristics it will find major application in the fields of telemetry and remote control, primarily in flight testing of aircraft and missiles. While the S.G.O. vas designed primarily for airborne use, it also has applications (see text) in the fields of spectroscopy, thermmodynamics, and mechanics. The theory of operation of the S.G.O., including mathematical analyses, is described in considerable detail. Special emphasis is placed on the incorporation of transistors. The uses, applications, and performance of the S.G.O. are also discussed together with its electrical and physical characteristics. The transistorized S.G.O. was developed for the AFFTC as a portion of Project DATUM under USAF Contract No. AF 04(611)-683.