Gray code-to-binary code converter and devices including the same
AssigneeSamsung Electronics Co., Ltd.
InventorHyeokjong Lee
Life of this patent
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Abstract
A gray code-to-binary code converter includes multiple parallel-in parallel-out (PIPO) latches, each of the multiple PIPO latches configured to output a parallel output gray code by latching a parallel input gray code in response to a sampling signal, and a parallel-in serial-out (PISO) circuit including a first group of switches, the PISO circuit configured to convert the parallel output gray code, which is latched in the multiple PIPO latches, into a binary code, and sequentially output bits of the binary code in units of bit, from a least significant bit (LSB) of the binary code to a most significant bit (MSB) of the binary code, while changing an arrangement of the first group of switches.
Claims20
A gray code-to-binary code converter comprising:
- multiple parallel-in parallel-out (PIPO) latches, each of the multiple PIPO latches configured to output a parallel output gray code by latching a parallel input gray code in response to a sampling signal;
- and
- a parallel-in serial-out (PISO) circuit including a first group of switches, the PISO circuit configured to
- convert the parallel output gray code, which is latched in the multiple PIPO latches, into a binary code, and
- sequentially output bits of the binary code in units of bit, from a least significant bit (LSB) of the binary code to a most significant bit (MSB) of the binary code, while changing an arrangement of the first group of switches.
A correlated double sampling (CDS) circuit comprising:
- a full adder including a first input terminal;
- and
- a gray code-to-binary code converter configured to
- convert a parallel input gray code into a binary code, and
- sequentially output bits of the binary code to the first input terminal of the full adder, from a least significant bit (LSB) of the binary code to a most significant bit (MSB) of the binary code in units of bit, while changing an arrangement of a first group of switches included in the gray code-to-binary code converter.
An image sensor comprising:
- a pixel array including multiple pixels, each of the multiple pixels configured to generate a pixel signal by performing photoelectric conversion;
- and
- an analog-to-digital converter configured to receive the pixel signal output from at least one pixel of the multiple pixels,
- wherein the analog-to-digital converter includes
- a ramp signal generator configured to generate a ramp signal,
- a sampling circuit configured to generate a sampling signal by sampling the pixel signal output from the at least one pixel, using the ramp signal, and
- a gray code-to-binary code converter configured to
- receive a parallel input gray code generated by a gray code generator and convert the parallel input gray code into a binary code, and
- sequentially output bits of the binary code, from a least significant bit (LSB) of the binary code to a most significant bit (MSB) of the binary code in units of bit, while changing an arrangement of a first group of switches included in the gray code-to-binary code converter.
Dependencies are inferred from the claim text.