CMOS integrated temperature insensitive, stable, and calibrated oscillator
AssigneeGeegah LLC
InventorsAmit Lal, Justin Kuo
Life of this patent
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Abstract
A temperature insensitive oscillator system. The system includes a substrate having a first surface and an opposing second surface, a CMOS device with one or more CMOS circuits attached to the first surface of the substrate, one or more piezoelectric transducers attached to an outer surface of the CMOS device, a voltage-controlled oscillator generating a RF frequency, which is transmitted as a plurality of short pulses to the one or more piezoelectric transducers, and one or more delays and oscillators using resistor and active components arranged alongside the piezoelectric transducers or on the CMOS device such that the voltage-controlled oscillator has minimal dependence on temperature, and has minimal deviation from a programmed frequency.
Claims20
An oscillator with minimized dependence on temperature, comprising:
- a voltage-controlled oscillator VCO generating a RF frequency, which is transmitted as a plurality of short pulses to a piezoelectric transducer;
- a piezoelectric receiver spaced from the piezoelectric transducer and configured to receive the plurality of short pulses;
- an RF envelope detector or RF mixer configured to convert the plurality of short pulses to an amplified signal;
- and
- a comparator configured to digitize the amplified signal and add temperature-dependent and programmed fixed delays.
A temperature insensitive oscillator system, comprising:
- a substrate having a first surface and an opposing second surface;
- a CMOS device comprising one or more CMOS circuits attached to the first surface of the substrate;
- one or more piezoelectric transducers attached to an outer surface of the CMOS device;
- a voltage-controlled oscillator generating a RF frequency, which is transmitted as a plurality of short pulses to the one or more piezoelectric transducers;
- and
- one or more resistors are arranged alongside the piezoelectric transducers or on the CMOS device such that the voltage-controlled oscillator has a controllable temperature dependence.
An oscillator with minimized dependence on temperature, comprising:
- a substrate having one or more transducers;
- a first oscillator configured to generate a RF frequency which excites the one or more transducers at their respective resonance frequencies;
- wherein the one or more transducers generate a sequence of RF pulses due to ultrasonic propagation in the bulk and transduction;
- and
- a second oscillator that is a voltage-controlled ring oscillator and having a frequency based on the difference between two of the RF pulses generated by the one or more transducers.
An oscillator with minimized dependence on temperature, comprising:
- a substrate having one or more transducers;
- a first oscillator configured to generate a RF frequency which excites the one or more transducers at their respective resonance frequencies;
- wherein the one or more transducers generate a sequence of RF pulses due to ultrasonic propagation in the bulk and transduction, wherein the difference between two ultrasonic received pulses is modified by temperature dependent, fixed, and programmable time delays;
- and
- a second oscillator having a frequency based on the difference between two of the RF pulses generated by the one or more transducers.
Dependencies are inferred from the claim text.