Nxp USA, Inc.

Pragya Priya Malakar

John M Pigott

Krishna Thakur

Divya Tripathi

Sadique Mohammad Iqbal

Anubhav Srivastava

Oscillator circuitry and methods of operation thereof are provided in which the oscillator circuitry includes at least a first oscillator, a second oscillator, and a lock detector. The first oscillator is configured to generate a first clock signal. The second oscillator is configured to generate a second clock signal. The lock detector is configured to detect a stable phase lock between the first clock signal and the second clock signal and to switch an output of the oscillator circuitry from the first clock signal to the second clock signal in response to detecting the stable phase lock.

Frequency-regulated oscillator circuit

A self-biased, closed loop, low current free running oscillator clock generator method and apparatus are provided with a current mode comparator connected to a trimming resistor and configured to compare an internally generated voltage reference Vsignal to a voltage feedback signal V, where the current mode comparator comprises a common gate amplifier connected to a current mirror circuit in a negative self-biased closed loop to generate a control current signal for controlling a current controlled oscillator to produce an output clock signal having a clock frequency based on the control current signal, where a frequency-to-voltage converter is connected in a feedback path to receive the output clock signal and is configured to produce the voltage feedback signal Vfor input to the current mode comparator, wherein the clock frequency of the output clock signal is tuned to a nominal locked output frequency fby the trimming resistor.

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Chandler, AZ, United States of America

Pragya Priya Malakar