Methods and apparatus for generating a high swing in an oscillator

An oscillator comprising:

• a tank to generate an oscillating output signal, corresponding to a voltage differential between a first node voltage at a first node of the tank and a second node voltage at a second node of the tank, in response to an edge of an enable signal;
• a feedback generator including:
• a first loop, forming a first feedback loop with the tank, to provide a first charge for maintaining the oscillating output signal;
• and
• a second loop, forming a second feedback loop with the tank, to provide a second charge for maintaining the oscillating output signal, the first and second charges combining with the oscillating output signal to generate a voltage swing greater than ±Vb, wherein Vb is a breakdown voltage of active components of the feedback generator, and the second loop includes:
• a sine-to-square wave converter to amplify and convert an oscillating voltage at the second node to a square wave;
• and
• a logic gate to output an output voltage when a complementary enable voltage and an output of the sine-to-square wave converter are below a threshold;
• and
• an attenuator, connected between the tank and the feedback generator, to isolate the tank from the active components of the feedback generator.