Oscillator with piezoelectric resonator
AssigneeThomson-CSF
InventorDidier Quievy
Life of this patent
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Abstract
An oscillator with a piezoelectric resonator is disclosed. Said oscillator comprises a resonator, for example, a quartz resonator, looped through a phase-shifting device and voltage-increasing means on a logic gate. Furthermore, the logic gate is biased by a resistor. The use of a logic gate gives excellent short-term stability at a very low cost. For example, the use of CMOS technology gives higher performance than that of oscillators using analog amplifiers, and does so at lower cost. The invention can be applied mainly to the making of oscillators that are highly stable, especially in the short term, and to the making of devices using oscillators of this type. Non-exhaustive examples of such devices include radars, transmitters, receivers, synchronizing devices, motor control devices, clocking devices and computers.
Claims14
An oscillator comprising:
- a piezoelectric resonator;
- a logic circuit;
- voltage-increasing means connected in a loop between an input and an output of said logic circuit;
- and
- means for biasing said logic circuit, including at least one of a resistor and a self-inductance coil.
An oscillator comprising:
- a piezoelectric resonator;
- a logic circuit;
- voltage-increasing means connected in a loop between an input and an output of said logic circuit;
- and
- means for biasing said logic circuit, including at least one of a resistor and a self-inductance coil,
- wherein the voltage-increasing means comprise a passive transformer.
An oscillator, comprising:
- an oscillating circuit, including a resonator and a logic circuit for producing an output signal having a level that is related to its input signal, connected to said resonator;
- and
- means for increasing a voltage of said output of said logic circuit, connected in a loop between said output signal, and said input signal.
Dependencies are inferred from the claim text.