Oscillator circuit and memory system
AssigneeKabushiki Kaisha Toshiba
InventorHiroshi Deguchi
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Abstract
An oscillator circuit generates a constant delay time by use of a current source and a load element to determine a frequency of a clock. The oscillator circuit includes an integrator which integrates the clock, a first comparator which compares an output voltage of the integrator with a reference voltage, and a variable current source which changes a current in accordance with the comparison result of the first comparator. The frequency is corrected in accordance with the current of the variable current source.
Claims16
An oscillator circuit which generates a constant delay time by use of a current source and a load element to determine a frequency of a clock, the oscillator circuit comprising:
- an integrator which integrates the clock;
- a first comparator which compares an output voltage of the integrator with a reference voltage;
- and
- a variable current source which changes a current in accordance with the comparison result of the first comparator,
- wherein the frequency is corrected in accordance with the current of the variable current source.
A memory system comprising:
- a memory which stores data;
- and
- a controller including an oscillator circuit which generates a constant delay time by use of a current source and a load element to determine a frequency of a clock, the controller transferring data to the memory in accordance with the clock,
- wherein the oscillator circuit comprises:
- an integrator which integrates the clock;
- a first comparator which compares an output voltage of the integrator with a reference voltage;
- and
- a variable current source which changes a current in accordance with the comparison result of the first comparator,
- the frequency being corrected in accordance with the current of the variable current source.
Dependencies are inferred from the claim text.