METHODS AND APPARATUS FOR GENERATING A HIGH SWING IN AN OSCILLATOR
First Claim
1. An oscillator comprising:
- a tank to generate an oscillating output signal in response receiving an edge of an enable signal;
a feedback generator including;
a first loop forming a first feedback loop with the tank, the first feedback loop providing a first charge to maintain the oscillating output signal; and
a second loop forming a second feedback loop with the tank, the second feedback loop providing a second charge to maintain the oscillating output signal, the first and second charges combining with the oscillating output signal to generate a high voltage swing; and
an attenuator connected between the tank and the feedback generator to isolate the tank from active components of the feedback generator.
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Abstract
Methods and apparatus are disclosed to generate an oscillating output signal having a voltage swing greater than a voltage swing across nodes of active devices. An example oscillator includes a tank to generate an oscillating output signal in response receiving an edge of an enable signal; a feedback generator including a first gain stage forming a first feedback loop with the tank, the first feedback loop providing a first charge to maintain the oscillating output signal and a second gain stage forming a second feedback loop with the tank, the second feedback loop providing a second charge to maintain the oscillating output signal, the first and second charges combining with the oscillating output signal to generate a high voltage swing; and an attenuator connected between the tank and the feedback generator to isolate the tank from active components of the feedback generator.
3 Citations
24 Claims
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1. An oscillator comprising:
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a tank to generate an oscillating output signal in response receiving an edge of an enable signal; a feedback generator including; a first loop forming a first feedback loop with the tank, the first feedback loop providing a first charge to maintain the oscillating output signal; and a second loop forming a second feedback loop with the tank, the second feedback loop providing a second charge to maintain the oscillating output signal, the first and second charges combining with the oscillating output signal to generate a high voltage swing; and an attenuator connected between the tank and the feedback generator to isolate the tank from active components of the feedback generator. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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Specification