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US 9,438,205 B2Granted
Temperature-compensated oscillator and device including the same
AssigneeSamsung Electronics Co., Ltd.
InventorsJun Ho Kim, Jong Pil Cho
Life of this patent
Estimating the term…
Abstract
A temperature-compensated oscillator and a device including the same include an oscillation unit configured to generate an oscillation signal using an operating current and an operating voltage, a bias circuit configured to control the operating current so that a frequency of the oscillation signal increases as a temperature increases, and a voltage generation unit configured to generate the operating voltage that varies with the temperature.
Claims19
A temperature-compensated oscillator comprising:
- an oscillation unit configured to generate an oscillation signal using an operating current and an operating voltage;
- a bias circuit configured to control the operating current so that a frequency of the oscillation signal increases as a temperature increases;
- and
- a voltage generation unit configured to generate the operating voltage that varies with the temperature,
- wherein the voltage generation unit comprises:
- an operating voltage generation transistor;
- and
- a bulk voltage controller configured to control a bulk voltage of the operating voltage generation transistor, and
- wherein the voltage generation unit compensates for a change in the frequency of the oscillation signal with respect to a change in the temperature complementarily with the bias circuit by controlling the operating voltage so that the frequency of the oscillation signal decreases as the temperature increases.
6 more elements
An electronic device comprising:
- a temperature-compensated oscillator configured to generate an oscillation signal having an output frequency insensitive to a temperature change;
- and
- a logic circuit configured to operate in response to the oscillation signal,
- wherein the temperature-compensated oscillator comprises:
- an oscillation unit configured to generate the oscillation signal using an odd number of inverters connected in series in a ring shape;
- a bias circuit configured to increase an operating current of each of the inverters as temperature increases;
- and
- a voltage generation unit configured to increase an operating voltage put across both ends of each inverter as the temperature increases,
- wherein the voltage generation unit comprises:
- an operating voltage generation transistor;
- and
- a bulk voltage controller configured to control a bulk voltage of the operating voltage generation transistor.
9 more elements
A temperature-compensated oscillator usable with an electronic device, comprising:
- an oscillation unit having inverters as a ring oscillator to be supplied with an operating voltage and an operating current which are variable according to a temperature change and to output an oscillation signal such that a characteristic of the operating current and a characteristic of the operating voltage can be offset to maintain a frequency of the oscillation signal stable regardless of the temperature change;
- and
- a voltage generation unit comprising an operating voltage generation transistor and a bulk voltage controller configured to control a bulk voltage of the operating voltage generation transistor such that the operating voltage is adjusted according to the bulk voltage.
Dependencies are inferred from the claim text.