Temperature-compensated oscillator and device including the same
First Claim
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1. 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, andwherein 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.
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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.
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Citations
19 Claims
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1. A temperature-compensated oscillator comprising:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. An electronic device comprising:
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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. - View Dependent Claims (16)
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17. A temperature-compensated oscillator usable with an electronic device, comprising:
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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. - View Dependent Claims (18, 19)
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Specification