Frequency correlated precision current reference

Details Frequency correlated precision current reference Frequency correlated precision current reference

1993-08-19

1995-09-05

Grimm, Siegfried H.

Oscillators

Automatic frequency stabilization using a phase or frequency...

With reference oscillator or source

331 34, 323234, 327108, H03L 7099, G05F 112

Patent

active

054482046

ABSTRACT:
A precision current source for providing a stable reference current wherein the current source comprises a reference oscillator and a frequency-to-current conversion network. The frequency-to-current conversion network includes a phase detector, a filter, and a ferrimagnetic resonant oscillator. The phase detector generates an error signal representative of a difference in phase angle between a first signal coupled to a first input terminal and a second signal coupled to a second input terminal. The reference oscillator provides a periodic reference signal to the first input terminal. The filter generates a current reference signal representative of a substantially dc portion of the error signal. The ferrimagnetic resonant oscillator receives the current reference signal from the filter, generates a periodic feedback signal having a frequency representative of the magnitude of the current reference signal, and couples that feedback signal to the second input of the phase detector.

REFERENCES:
patent: 3895312 (1975-07-01), Tipon
patent: 4862015 (1989-08-01), Grandfield
Sidney Soclof, Analog Integrated Circuits, Prentice-Hall, Inc., Englewood Cliffs, N.J. (1985) pp. 468-471.

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