Fast startup resonant element oscillator

) The oscillator circuit of claim 1, wherein said main oscillator is selected from at least one of a Pierce oscillator, a Colpitts oscillator and a ring oscillator.

) The oscillator circuit of claim 1, wherein said tunable oscillator is at least one of operating condition independent and operating condition compensated.

) The tunable oscillator of claim 3, wherein said operating condition is temperature.

) The oscillator circuit of claim 1, wherein said tunable oscillator is selected from at least one of a ring oscillator, a relaxation oscillator, and an RC oscillator.

) The oscillator circuit of claim 1, wherein said input signal is a repetitive electronic signal including at least one of a sine wave, a square wave, and a saw tooth wave.

) The oscillator circuit of claim 1, wherein said tunable frequency is determined from a frequency value control state of said compare and control circuitry;

• wherein said compare and control circuitry provides said frequency value control state to said tunable oscillator;
• and wherein said adjusting of said tunable frequency is actuated by adjusting said frequency value control state.

) The oscillator circuit of claim 1, wherein said main oscillator is in a differential mode.

) The oscillator circuit of claim 1, wherein said resonant frequency is one of multiple resonant frequencies of said resonator.

) The oscillator circuit of claim 1, wherein said resonator is at least one of a piezoelectric crystal, a MEMS element, a film bulk element, and a membrane related element.

) The oscillator circuit of claim 1, wherein said compare and control circuitry can disable said coupling in of said input signal independently of said tunable oscillator.

) The oscillator circuit of claim 1, wherein said compare and control circuitry disables said tunable oscillator after at least one of a set amount of time, after said compare and control circuitry counts a certain number of pulses from said tunable oscillator or said main oscillator, and after said compare and control circuitry detects when a signal in said oscillator circuit has a selected amplitude.

) The method of claim 14, wherein said applying said specific state and said AC coupling are repeated when said oscillator goes through a shutdown and startup cycle.

) The method of claim 14, wherein said first impetus signal is equal to an estimate of said resonant frequency of said resonator.

) The method of claim 14, wherein said AC coupling of said output frequency is deactivated after a third set time;

• and wherein said third set time is substantially shorter than said first set time.

) The method of claim 14, wherein said generating of said first impetus signal is accomplished by applying an estimate resonant frequency value state to said tunable oscillator;

• and wherein said estimate resonant frequency value state is chosen to induce said output of said tunable oscillator to be equivalent to an estimate of said resonant frequency.

) The method of claim 18, wherein said estimate resonant frequency value state is replaced by an earlier stored specific state;

• wherein said storing of said specific state is done at the same time as storing a corresponding value that relates to a set of operating conditions of said oscillator when said measuring is executed, said specific state and said corresponding value forming an entry in an index of specific states;
• and wherein said earlier stored specific state is selected from said index of specific states based on which said entry has said corresponding value whose said set of operating conditions most closely match the current operating conditions of said oscillator.

) The method of claim 18, wherein said estimate resonant frequency value state is replaced by an earlier stored specific state;

• wherein said storing of said specific state is done at the same time as storing a corresponding value that relates to a particular resonant frequency targeted, said specific state and said corresponding value forming an entry in an index of specific states;
• and wherein said earlier stored specific state is selected from said index of specific states based on which said entry has said corresponding value whose said particular resonant frequency targeted is equivalent to the currently targeted resonant frequency of said oscillator.