Analog-to-digital converter, sensor and apparatus
AssigneeCanon Kabushiki Kaisha
InventorHitoshi Nasu
Life of this patent
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Abstract
An analog-to-digital converter comprises: an analog-to-digital conversion unit that performs analog-to-digital conversion using ΔΣ modulation on an image signal output from pixels; a setting unit that sets an operating frequency of the analog-to-digital conversion unit; and a generation unit that generates a clock signal having the operating frequency and supplies it to the analog-to-digital conversion unit. The setting unit sets the operating frequency based on at least one of a digital gain to be applied to the signal output from the analog-to-digital conversion unit and a shooting mode.
Claims12
An analog-to-digital converter comprising:
- one or more processors and/or circuitry which function as:
- an analog-to-digital conversion unit that performs analog-to-digital conversion using ΔΣ modulation on an image signal output from pixels;
- a setting unit that sets an operating frequency of the analog-to-digital conversion unit;
- and
- a generation unit that generates a clock signal having the operating frequency and supplies it to the analog-to-digital conversion unit,
- wherein the setting unit sets the operating frequency based on at least one of a digital gain to be applied to the signal output from the analog-to-digital conversion unit and a shooting mode so that bit precision of a signal obtained by applying a digital gain to the image signal which has undergone the analog-to-digital conversion by the analog-to-digital conversion unit is constant regardless of magnitude of the digital gain.
A sensor comprising:
- a plurality of pixels;
- and
- an analog-to-digital converter comprising one or more processors and/or circuitry which function as:
- an analog-to-digital conversion unit that performs analog-to-digital conversion using ΔΣ modulation on an image signal output from the pixels;
- a setting unit that sets an operating frequency of the analog-to-digital conversion unit;
- and
- a generation unit that generates a clock signal having the operating frequency and supplies it to the analog-to-digital conversion unit, and
- wherein the setting unit sets the operating frequency based on at least one of a digital gain to be applied to the signal output from the analog-to-digital conversion unit and a shooting mode so that bit precision of a signal obtained by applying a digital gain to the image signal which has undergone the analog-to-digital conversion by the analog-to-digital conversion unit is constant regardless of magnitude of the digital gain.
An apparatus comprising:
- a sensor that includes:
- a plurality of pixels;
- and
- an analog-to-digital converter comprising one or more processors and/or circuitry which function as:
- an analog-to-digital conversion unit that performs analog-to-digital conversion using ΔΣ modulation on an image signal output from the pixels;
- a setting unit that sets an operating frequency of the analog-to-digital conversion unit;
- and
- a generation unit that generates a clock signal having the operating frequency and supplies it to the analog-to-digital conversion unit;
- and
- a signal processing unit that processes the image signal converted by the analog-to-digital converter,
- wherein the setting unit sets the operating frequency based on at least one of a digital gain to be applied to the signal output from the analog-to-digital conversion unit and a shooting mode so that bit precision of a signal obtained by applying a digital gain to the image signal which has undergone the analog-to-digital conversion by the analog-to-digital conversion unit is constant regardless of magnitude of the digital gain.
Dependencies are inferred from the claim text.