Modifiable oscillator circuit for operating modes

A method comprising:

• generating a first clock signal with an oscillator circuit in a first operating mod;
• wherein the oscillator circuit is modifiable between a first operating mode and a second operating mode, wherein the first operating mode has a first frequency accuracy and a first current consumption, wherein the second operating mode has a second frequency accuracy and a second current consumption;
• transmitting a message using the first clock signal;
• modifying the oscillator circuit from the first operating mode to a second operating mode, wherein the second frequency accuracy is more accurate than the first frequency accuracy and the second current consumption is hither than the first current consumption, wherein the first operating mode is biased into weak inversion and the second operating mode is biased into moderate inversion, wherein the second operating mode generates less random telegraph noise than the first operating mode;
• generating a second clock signal with the oscillator circuit in the second operating mode;
• and
• transmitting a message using the second clock signal.

A system comprising:

• a power management circuit;
• a radio circuit electrically connected to the power management circuit, wherein the radio circuit outputs signals to an antenna;
• an oscillator circuit electrically connected to the power management circuit, wherein the oscillator circuit is modifiable between first and second operating modes, wherein the first operating mode has a first frequency accuracy and a first current consumption, wherein the second operating mode has second frequency accuracy and a second current consumption, wherein the second frequency accuracy is more accurate than the first frequency accuracy and the second current consumption is higher than the first current consumption, wherein the first operating mode comprises a respective transistor biased into weak inversion and the second operating mode comprises a respective transistor biased into moderate inversion, wherein the second operating mode generates less random telegraph noise than the first operating mode;
• a control circuit electrically connected to the radio circuit, the power management circuit and the oscillator circuit, wherein the control circuit modifies the operating mode of the oscillator circuit;
• and
• a wake circuit electrically connected to the oscillator circuit and the power management circuit, wherein the wake circuit produces a signal to the power management circuit based on the operating mode of the oscillator circuit.