Image pick-up apparatus and image pick-up system
First Claim
Patent Images
1. An image pick-up apparatus comprising:
- an area sensor in which detecting elements are two-dimensionally arranged on a substrate;
a read device for reading a signal from the detecting elements;
a power supply circuit, for supplying a reference voltage to the read device, which comprises a regulator for regulating the reference voltage; and
a low-pass filter arranged between the regulator and the read device, wherein the reference voltage is supplied through the low-pass filter from the power supply circuit,wherein the low-pass filter has a cutoff frequency to make an effective value of noise of the reference voltage passed through the low-pass filter, so that an effective value of line noise produced in the area sensor is reduced to a value not more than one-tenth of an effective value of random noise produced in the area sensor.
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Abstract
An image pick-up apparatus comprising an area sensor in which detecting elements are two-dimensionally arranged on a substrate, and a reference supply circuit, for supplying a reference voltage to the detecting elements, which comprises a regulator for regulating the reference voltage. A low-pass filter is arranged between the regulator and the detecting elements. The reference voltage is supplied through the low-pass filter from the reference supply circuit.
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Citations
34 Claims
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1. An image pick-up apparatus comprising:
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an area sensor in which detecting elements are two-dimensionally arranged on a substrate; a read device for reading a signal from the detecting elements; a power supply circuit, for supplying a reference voltage to the read device, which comprises a regulator for regulating the reference voltage; and a low-pass filter arranged between the regulator and the read device, wherein the reference voltage is supplied through the low-pass filter from the power supply circuit, wherein the low-pass filter has a cutoff frequency to make an effective value of noise of the reference voltage passed through the low-pass filter, so that an effective value of line noise produced in the area sensor is reduced to a value not more than one-tenth of an effective value of random noise produced in the area sensor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 24)
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8. An image pick-up apparatus comprising:
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an area sensor in which detecting elements are two-dimensionally arranged on a substrate; a read device for reading a signal from the detecting elements; a power supply circuit, for supplying a sensor bias voltage to the detecting elements of the area sensor and for supplying a reference voltage to the read device, which comprises a first regulator for regulating the sensor bias voltage and a second regulator for regulating the reference voltage; a first low-pass filter arranged between the first regulator and the detecting elements, wherein the sensor bias voltage is supplied through the low-pass filter from the power supply circuit; and a second low-pass filter arranged between the second regulator and the read device, wherein the reference voltage is supplied through the second low-pass filter from the power supply circuit, wherein the first low-pass filter has a cutoff frequency to make an effective value of noise of the sensor bias voltage passed through the first low-pass filter so that an effective value of line noise produced in the area sensor is reduced to a value not more than one-tenth of an effective value of random noise produced in the area sensor, and the second low-pass filter has a cutoff frequency to make an effective value of noise of the reference voltage passed through the second low-pass filter so that an effective value of line noise produced in the area sensor is reduced to a value not more than one-tenth of an effective value of random noise produced in the area sensor. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. An image pick-up apparatus comprising:
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an area sensor in which detecting elements are two-dimensionally arranged on a substrate; a read device for reading a signal from the detecting elements; a power supply circuit, for supplying a reference voltage to the read device, which comprises a regulator for regulating the reference voltage; and a low-pass filter arranged between the regulator and the read device, wherein the reference voltage is supplied through the low-pass filter from the power supply circuit, wherein the low-pass filter has a cutoff frequency set to be 3 to 10 times the frame rate of the area sensor. - View Dependent Claims (19, 20, 21, 22, 23)
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25. An image pick-up apparatus comprising:
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an area sensor in which detecting elements are two-dimensionally arranged on a substrate; a read device for reading a signal from the detecting elements; a power supply circuit, for supplying a sensor bias voltage to the detecting elements of the area sensor and for supplying a reference voltage to the read device, which comprises a first regulator for regulating the sensor bias voltage and a second regulator for regulating the reference voltage; a first low-pass filter arranged between the first regulator and the detecting elements, wherein the sensor bias voltage is supplied through the low-pass filter from the power supply circuit; and a second low-pass filter arranged between the second regulator and the read device, wherein the reference voltage is supplied through the second low-pass filter from the power supply circuit, wherein a cutoff frequency of the first low-pass filter and a cutoff frequency of the second low-pass filter are respectively set to be 3 to 10 times the frame rate of the area sensor. - View Dependent Claims (26, 27, 28, 29, 30, 31, 32, 33, 34)
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Specification