Constant amplitude control of electromechanical oscillators

Details Constant amplitude control of electromechanical oscillators Constant amplitude control of electromechanical oscillators

1978-05-30

1979-12-04

Grimm, Siegfried H.

Oscillators

Automatic frequency stabilization using a phase or frequency...

With reference oscillator or source

331116M, 331156, 331183, 73 59, 73646, 318128, 318132, G01N 1116, H03B 530, H03B 302

Patent

active

041774345

ABSTRACT:
Method and system for the constant amplitude control of an electromechanical oscillator utilizing a phase locked oscillator to generate a secondary a-c setpoint which is compared to the oscillator output to provide a difference signal which is passed as a fast-acting negative feedback signal to stabilize the amplitude.

REFERENCES:
patent: 2469264 (1949-05-01), Goldberg
patent: 3384837 (1968-05-01), Toussaint et al.
patent: 3609578 (1971-09-01), Chapman et al.
patent: 3710614 (1973-01-01), Oppliger
patent: 3712117 (1973-01-01), Fitzgerald et al.
patent: 3796088 (1974-03-01), Gustafsson et al.
patent: 4049997 (1977-09-01), McGhee
patent: 4118674 (1978-10-01), Ball
Oshiro, "Exclusive-or IC's Serve for Phase-Locking Tasks", Electronics, Jun. 22, 1970, p. 83.
Simson et al., Automatic Internal Friction and Modulus Measurement Apparatus Utilizing a Phase-Locked Loop; Rev. Sci. Instrum., vol. 48, No. 11, Nov. 1977; pp. 1392-1396.

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