Frequency stabilized oscillator

Details Frequency stabilized oscillator Frequency stabilized oscillator

1988-07-28

1990-01-09

Laroche, Eugene R.

Oscillators

Ring oscillators

331108B, H03B 100

Patent

active

048930954

ABSTRACT:
An oscillator, for example, a ring oscillator, comprises an oscillator stage which includes a current source in series with a parallel connection of a switching element (a transistor) and a capacitance. A delay circuit is connected between the junction point of the current source and the parallel connection and the input of the switching element. The oscillation frequency is determined to a suitable approximation by the capacitance and by the ratio of the magnitude of the switching threshold of the switching element and the current to be supplied by the current source. A frequency stabilization means for the oscillator adjusts the current to be delivered by the current source by means of a resistor so that the ratio of this current and the switching threshold is proportional to the value of the resistor. The constant resistance value of the resistor is then a factor which determines the oscillation frequency.

REFERENCES:
patent: 4015219 (1977-03-01), Kawagoe et al.
patent: 4072910 (1978-02-01), Dingwall et al.
Paul R. Gray and Robert G. Meyer, Analysis and Design of Analog Integrated Circuits, John Wiley and Sons, pp. 730-733.

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