Method for operating a fast start-up oscillator system, and fast start-up oscillator system

A fast start-up oscillator system comprising a reference oscillator and a quartz oscillator, which comprises a quartz resonator connected to an electronic oscillator circuit, and first and second terminals (X1, X2) connected to the first and second terminals of the quartz resonator and the electronic oscillator circuit respectively, an output terminal of which is provided to supply a master clock signal (mck) to a start-up controller, which is configured and switched on to perform a fast start-up procedure of the quartz oscillator via the reference oscillator, the start-up controller comprising a calculation unit as well as a memory unit for storing data in connection with the reference oscillator and for starting the quartz oscillator,

• wherein the reference oscillator is arranged to operate continuously so as to determine any phase deviation between the reference oscillator and the quartz oscillator in each start-up time of the oscillator system, and intended to directly determine a frequency error based on a phase variation so that it can be corrected at the end of a start-up time, and
• wherein the oscillator comprises the reference oscillator, which is an RC oscillator, intended to be left in continuous operation with low power consumption, in that the start-up controller comprises the calculation unit, which is a processor or a microcontroller, and the memory unit for storing data in connection with the reference oscillator, in that the oscillator system comprises a comparator, having a first input terminal (X1) connected to the first terminal of the quartz oscillator, and a second input terminal (X2) connected to the second terminal of the quartz oscillator, in that it comprises a synchroniser comprising a synchronisation input or comparator output, in that a frequency signal (f0) from the start-up controller is supplied to the oscillator, which is intended to supply a time base signal (rck) for the start-up controller, and is connected to a clock input of the synchroniser, and wherein the output terminal of the synchroniser is directly connected to the start-up controller, for determining phase deviations of the quartz oscillator signals from the reference oscillator signals when the oscillator system is started.

A fast start-up oscillator comprising a reference oscillator and a quartz oscillator, which comprises a quartz resonator connected to an electronic oscillator circuit, and first and second terminals (X1, X2) connected to the first and second terminals of the quartz resonator and the electronic oscillator circuit respectively, an output terminal of which is provided to supply a master clock signal (mck) to a start-up controller, which is configured and switched on to perform a fast start-up procedure of the quartz oscillator via the reference oscillator, the start-up controller comprising a calculation unit as well as a memory unit for storing data in connection with the reference oscillator and for starting the quartz oscillator,

• wherein the reference oscillator is arranged to operate continuously so as to determine any phase deviation between the reference oscillator and the quartz oscillator in each start-up time of the oscillator system, and intended to directly determine a frequency error based on a phase variation so that it can be corrected at the end of a start-up time, and
• wherein the oscillator comprises the reference oscillator, which is an RC oscillator, intended to be left in continuous operation with low power consumption, in that the start-up controller comprises the calculation unit, which is a processor or a microcontroller, and the memory unit for storing data in connection with the reference oscillator, in that the oscillator system comprises a comparator, having a first input terminal (X1) connected to the first terminal of the quartz oscillator, and a second input terminal (X2) connected to the second terminal of the quartz oscillator, in that it comprises a synchroniser comprising a synchronisation input or comparator output, in that a frequency signal (f0) from the start-up controller is supplied to the oscillator, which is intended to supply a time base signal (rck) on the one hand to the start-up controller and on the other hand to a phase-locked loop, the output terminal of which is connected to a clock input of the synchroniser, and wherein the output terminal of the synchroniser is directly connected to the start-up controller for determining phase deviations of the quartz oscillator signals from the reference oscillator signals when the oscillator system is started.

A fast start-up oscillator system comprising a reference oscillator and a quartz oscillator, which comprises a quartz resonator connected to an electronic oscillator circuit, and first and second terminals (X1, X2) connected to the first and second terminals of the quartz resonator and the electronic oscillator circuit respectively, an output terminal of which is provided to supply a master clock signal (mck) to a start-up controller, which is configured and switched on to perform a fast start-up procedure of the quartz oscillator via the reference oscillator, the start-up controller comprising a calculation unit as well as a memory unit for storing data in connection with the reference oscillator and for starting the quartz oscillator,

• wherein the reference oscillator is arranged to operate continuously so as to determine any phase deviation between the reference oscillator and the quartz oscillator in each start-up time of the oscillator system, and intended to directly determine a frequency error based on a phase variation so that it can be corrected at the end of a start-up time, and
• wherein the oscillator comprises the reference oscillator, which is an RC oscillator, intended to be left in continuous operation with low power consumption, in that the start-up controller comprises the calculation unit, which is a processor or a microcontroller, and the memory unit for storing data in connection with the reference oscillator, in that the oscillator system comprises a comparator, having a first input terminal (X1) connected to the first terminal of the quartz oscillator, and a second input terminal (X2) connected to the second terminal of the quartz oscillator, in that it comprises a synchroniser comprising a synchronisation input or comparator output, in that a frequency signal (f0) from the start-up controller is supplied to the oscillator, which is intended to supply a time base signal (rck) on the one hand to the start-up controller and on the other hand to a delay-locked loop, the output terminal of which is connected to a clock input of the synchroniser, and wherein the output terminal of the synchroniser is directly connected to the start-up controller for determining phase deviations of the quartz oscillator signals from the reference oscillator signals when the oscillator system is started.

A fast start-up oscillator system comprising a reference oscillator and a quartz oscillator, which comprises a quartz resonator connected to an electronic oscillator circuit, and first and second terminals (X1, X2) connected to the first and second terminals of the quartz resonator and the electronic oscillator circuit respectively, an output terminal of which is provided to supply a master clock signal (mck) to a start-up controller, which is configured and switched on to perform a fast start-up procedure of the quartz oscillator via the reference oscillator, the start-up controller comprising a calculation unit as well as a memory unit for storing data in connection with the reference oscillator and for starting the quartz oscillator,

• wherein the reference oscillator is arranged to operate continuously so as to determine any phase deviation between the reference oscillator and the quartz oscillator in each start-up time of the oscillator system, and intended to directly determine a frequency error based on a phase variation so that it can be corrected at the end of a start-up time, and
• wherein the oscillator comprises the reference oscillator, which is an RC oscillator with a synchronisation IQ mixer, intended to be left in continuous operation with low power consumption, in that the start-up controller comprises the calculation unit, which is a processor or a microcontroller, and the memory unit for storing data in connection with the reference oscillator, in that the oscillator system comprises a comparator, having a first input terminal (X1) connected to the first terminal of the quartz oscillator, and a second input terminal (X2) connected to the second terminal of the quartz oscillator, in that it comprises a synchroniser comprising a synchronisation input or comparator output, in that a frequency signal (f0) from the start-up controller is supplied to the oscillator, in that it comprises two mixers for receiving a time base signal (rck) from the reference oscillator, and each respectively a signal from the synchroniser, in that the output of each of the mixers is supplied to an adder, the output of which is connected to the clock input of the synchroniser, and wherein the output terminal of the synchroniser is directly connected to the start-up controller for determining phase deviations of the quartz oscillator signals from the reference oscillator signals when the oscillator system is started up.