Method of driving a two coordinate oscillator and circuit arrangement therefor
AssigneeErnst Leitz G.m.b.H.
InventorHelmuth Frenk
Life of this patent
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Abstract
A method and a circuit arrangement for driving a two co-ordinate mechanical oscillator with the aid of a deformed rotating field of forces defined by a plurality of exciting and pick-up components. The power dissipation of the employed circuits is kept at a low level by operating the oscillator near the mechanical resonance frequency. The exciting signals are achieved by comparing phase shifted electrical signals derived from the mechanical motion of the oscillator in a first pick-up component with the undisplaced signals of the second directional component and by supplying the difference signal obtained therefrom to the second exciting components of the oscillator. This is continued to the next adjacent components until the ring is closed.
Claims7
A method of driving a two coordinate mechanical oscillator with the aid of a deformed rotating field of forces defined by a plurality of exciting and pick-up components, the method comprising the steps of:
- a. deriving a plurality of first electrical signals each corresponding to the mechanical motion of the oscillator in a respective one of the component directions;
- b. imparting to each first signal a phase shift equal to the geometrical angle between cyclically preceding ones of the pick-up components;
- c. comparing in the cyclical sequence given by each undisplaced first signal the deformed rotating field of forces adjacent to the exciting and pick-up components corresponding to the respective first signal with the phase displaced signal corresponding to the preceding pick-up component next adjacent;
- d. deriving a respective difference signal from each comparison;
- and
- e. applying each difference signal to respective exciting means of the mechanical oscillator associated with the component corresponding to the respective first undisplaced signal.
A circuit arrangement for driving a two coordinate mechanical oscillator with the aid of a deformed rotating field of forces defined by a plurality of exciting and pick-up components, the arrangement comprising:
- a. a plurality of pick-up transducers each to provide a respective electrical signal representative of the elongation of the mechanical oscillation in a respective one of the component directions;
- b. a plurality of amplifiers each having input means connected to output means of a corresponding one of the pick-up transducers;
- c. a plurality of phase shift networks each having input means connected to output means of a corresponding one of the amplifiers;
- d. a plurality of differential amplifiers each corresponding to a respective one of the pick-up transducers and each having first input means connected to output means of a corresponding one of the amplifiers and second input means connected to output means of the phase shift network corresponding to the preceding pick-up component in the cyclical sequence given by the deformed rotating electrical field;
- and
- e. a plurality of exciting transducers each having input means connected to output means of a corresponding one of the differential amplifiers to apply mechanical drive in the direction of the corresponding component of the mechanical oscillator.
A circuit arrangement for driving a two coordinate mechanical oscillator with the aid of a deformed rotating field of forces defined by a plurality of exciting and pick-up components, the arrangement comprising:
- a. a plurality of pick-up transducers each to provide a respective electrical signal representative of the elongation of the mechanical oscillation in a respective one of the component directions;
- b. a plurality of amplifiers each having input means connected to output means of a corresponding one of the pick-up transducers;
- c. a plurality of phase shift networks each having input means connected to output means of a corresponding one of the amplifiers;
- d. a plurality of potential dividers each connected to output means of a corresponding one of the amplifiers;
- e. a plurality of differential amplifiers each corresponding to a respective one of the pick-up transducers and each having first input means connected to an intermediate point on a corresponding one of the potential dividers and second input means connected to output means of the phase shift network corresponding to the pick-up component in the cyclical sequence given by the deformed rotating electrical field;
- and
- f. a plurality of exciting transducers each having input means connected to output means of a corresponding one of the differential amplifiers to apply mechanical drive in the direction of the corresponding component of the mechanical oscillator.
Dependencies are inferred from the claim text.