Patent ID: 8451064

Claim:
An oscillator module comprising: a first node for a first voltage; a control node for a first control signal; oscillator circuitry coupled to the first node and the control node, wherein the oscillator circuitry is configured to: generate an output signal with a first oscillation frequency based on the first voltage in response to the first control signal having a first state; and generate the output signal with a second oscillation frequency based on the first voltage in response to the first control signal having a second state, the second oscillation frequency being greater than the first oscillation frequency; and a control module coupled to the control node, wherein the control module is configured to: set the first voltage to a lower threshold voltage; count a number of oscillations of the output signal after setting the first voltage to the lower threshold voltage, resulting in a counted number of oscillations; increase the first voltage in a manner that is influenced by the counted number of oscillations; and provide the first control signal in the second state in response to identifying the first voltage is greater than a threshold voltage.