Abstract Quartz oscillator having very low power consumption comprising an amplifier formed by two complementary semi-conductors whose sources, gates and drains are connected in parallel in an alternate arrangement with a power supply, a quartz crystal connected between the drains and the gates, a detection capacitor connected between the gates and the sources and a charge capacitor connected between the sources and the drains. Continuous polarization of the semi-conductors is separately effected by the charge of an integration capacitor connecting their respective gates in such a manner that, when the oscillation amplitude is low, the amplifier operates in class A, the semi-conductors each having a threshold voltage between the drain and gate thereof equal or less than that at which it becomes conductive when the drain-source voltage of the semiconductor tends towards zero, whereby to modify the charge of the polarization capacitor and thereby the polarization of the amplifier which passes from class A to class B, then to class C when the amplitude of oscillation increases.
A quartz oscillator having low power consumption comprising an amplifier formed by two complementary semi-conductor elements having sources, gates and drains respectively connected to one another in parallel arrangement with regard to a power supply, a quartz crystal connected between the drains and the gates, a detection capacitor connected between the gates and the sources of the respective semi-conductor elements, a charge capacitor connected between the sources and the drains, and polarization means including an integration capacitor connecting the respective gates of the semi-conductor elements for effecting continuous polarization of the semi-conductor elements by the charge of said integration capacitor such that when the oscillation amplitude is low, the amplifier operates in class A, said semi-conductor elements each having a threshold voltage between its drain and gate which is no greater than that when it becomes conductive when the drain-source voltage of said semiconductor element tends towards zero, to modify the charge of the polarization capacitor and thereby, the polarization of the amplifier which passes from class A to class B, then to class C when the amplitude of oscillation increases.
Claim 2
Dependent Claim
181 words
A quartz oscillator having low power consumption comprising an amplifier formed by two complementary semi-conductor elements having sources, gates and drains respectively connected to one another in parallel arrangement with regard to a power supply, a quartz crystal connected between the drains and the gates, a detection capacitor connected between the gates and the sources of the respective semi-conductor elements, a charge capacitor connected between the sources and the drains, and polarization means including an integration capacitor connecting the respective gates of the semi-conductor elements for effecting continuous polarization of the semi-conductor elements by the charge of said integration capacitor such that when the oscillation amplitude is low, the amplifier operates in class A, said semi-conductor elements each having a threshold voltage between its drain and gate which is no greater than that when it becomes conductive when the drain-source voltage of said semiconductor element tends towards zero, to modify the charge of the polarization capacitor and thereby, the polarization of the amplifier which passes from class A to class B, then to class C when the amplitude of oscillation increases.
Claim 3
Dependent Claim
52 words
An oscillator as claimed in claim 1 wherein said polarization means further comprises a pair of additional semi-conductor elements connected in series with the polarization capacitor and in parallel with said quartz crystal, said additional semi-conductor elements being of the same type and threshold value as the corresponding first said semi-conductor elements.
Claim 4
Dependent Claim
26 words
An oscillator as claimed in claim 2 wherein said additional semI-conductor elements are connected in parallel with the first said semi-conductor elements which form the amplifier.