Amplifier circuit, comparator, and solid-state imaging device
AssigneeSony Semiconductor Solutions Corporation
InventorsKAZUKI NOMOTO, RUITO AIBA, MASAAKI BAIRO, HIDETOSHI OISHI
Life of this patent
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Abstract
An amplifier circuit, a comparator, and a solid-state imaging device capable of suppressing RTS noise are provided. An amplifier circuit in the present disclosure includes an active load and a plurality of input transistors electrically connected to the active load, in which gates of the plurality of input transistors are electrically connected to each other, and the plurality of input transistors includes two or more input transistors connected in series with each other.
Claims20
Amplifier circuit comprising:
- an active load;
- and
- a plurality of input transistors electrically connected to the active load, wherein
- gates of the plurality of input transistors are electrically connected to each other, and
- the plurality of input transistors includes two or more input transistors connected in series with each other.
A comparator comprising:
- a first amplifier circuit to which a reference signal is input;
- a second amplifier circuit to which a comparison signal is input;
- and
- a tail portion that controls a tail current, the tail portion being electrically connected to the first amplifier circuit and the second amplifier circuit, wherein
- each of the first amplifier circuit and the second amplifier circuit includes:
- an active load;
- and
- a plurality of input transistors electrically connected to the active load,
- gates of the plurality of input transistors are electrically connected to each other, and
- the plurality of input transistors includes two or more input transistors connected in series with each other.
A solid-state imaging device comprising:
- a pixel array in which a plurality of pixels each including a photoelectric conversion unit is arranged in a matrix;
- and
- an AD conversion unit that converts pixel signals output from the pixels of the pixel array from analog signals to digital signals, the AD conversion unit including a comparator, wherein
- the comparator includes:
- a first amplifier circuit to which a reference signal is input;
- a second amplifier circuit to which the analog signal is input as a comparison signal;
- and
- a tail portion that controls a tail current, the tail portion being electrically connected to the first amplifier circuit and the second amplifier circuit,
- each of the first amplifier circuit and the second amplifier circuit includes:
- an active load;
- and
- a plurality of input transistors electrically connected to the active load,
- gates of the plurality of input transistors are electrically connected to each other, and
- the plurality of input transistors includes two or more input transistors connected in series with each other.
Dependencies are inferred from the claim text.