Integratable amplitude-regulated oscillator circuit

Details Integratable amplitude-regulated oscillator circuit Integratable amplitude-regulated oscillator circuit

1990-03-05

1991-03-12

Grimm, Siegfried H.

Oscillators

Solid state active element oscillator

Transistors

331116FE, 331183, H03B 536, H03L 500

Patent

active

049995880

ABSTRACT:
An integratable amplitude-regulated oscillator circuit includes a resonator element, a control element having a control input, an inverter having an output and an input coupled to one another through the resonator element and having a quadrature-axis current component being variable by the control element, an amplitude regulating circuit having an input connected to the input of the inverter and an output connected to the control input of the control element, and an output stage having an input connected to the input of the inverter. The amplitude regulating circuit includes a differential amplifier having an inverting input and a non-inverting input, a first peak value rectifier connected upstream of the inverting input, and a second peak value rectifier connected upstream of the non-inverting input. The first peak value rectifier is acted upon by a sum of a signal voltage present at the input of the inverter and a first auxiliary voltage derived from a reference voltage, and the second peak value rectifier is acted upon by a second auxiliary voltage derived from the reference voltage.

REFERENCES:
Publication IEEE Solid State Circuits, vol. 23, No. 3, Jun. 1988; Eric A. Vittoz et al., "High-Performance Crystal Oscillator Circuits: Theory and Application", pp. 774-782.

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