Relaxation oscillator
AssigneesAgency for Science, Technology and Research, Physical Logic AG
InventorsAndrew Kunil Choe, Minkyu Je, Bernal Oliver Daniel, David Nuttman
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Abstract
A relaxation oscillator and a method for offset cancellation in a relaxation oscillator. The relaxation oscillator comprises two comparator units, each comparator unit comprising a comparator element and a memory element; and a switch control generator coupled to each of the comparator units; wherein each comparator unit, in a reset state, stores an input-offset voltage on the memory element under the control of the switch control generator such that, in a comparison state, the input-offset voltage is applied to both inputs of the comparator for implementing an offset-free threshold.
Claims17
A relaxation oscillator comprising:
- two comparator units, each comparator unit comprising a comparator element and a memory element;
- and
- a switch control generator coupled to each of the comparator units;
- wherein each comparator unit, in a reset state, stores an input-offset voltage on the memory element under the control of the switch control generator such that, in a comparison state, the input-offset voltage is applied to both inputs of the comparator for implementing an offset-free threshold.
A method for offset cancellation in a relaxation oscillator, the method comprising the steps of:
- for each of two comparators, storing an input-offset voltage on a memory element in a reset phase;
- and
- applying, in a comparison phase, a reference voltage, including the input-offset voltage, at a first input of the respective comparators and simultaneously applying the input-offset voltage from the memory element at a second input of the respective comparators for implementing an offset-free threshold.
Dependencies are inferred from the claim text.