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公开(公告)号：US20230053956A1
公开(公告)日：2023-02-23
申请号：US17718450
申请日：2022-04-12
发明人： Myeongjin OH , Jaejung PARK , Hyosang KIM , Sukho SHIN , Haneul JUNG
IPC分类号： H04N5/378 , H04N5/3745
摘要： In an example embodiment, a ramp generator includes a ramp circuit that receives a first ramp enable signal from a control circuit during a first ramp period, the first ramp period including a first reset period and a first sensing period, and the ramp circuit being configured to output a first ramp signal to a correlated double sampling circuit; an emphasis circuit that increases a voltage level of the first ramp signal during the first reset period, based on a first enable signal received from the control circuit; and a pre-emphasis circuit that further increases the voltage level of the first ramp signal during a first pre-emphasis period in the first reset period, based on a second enable signal received from the control circuit.
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公开(公告)号：US20240323570A1
公开(公告)日：2024-09-26
申请号：US18610971
申请日：2024-03-20
发明人： Myeongjin OH , Mooyoung KIM , Jaejung PARK , Haneul JUNG
CPC分类号： H04N25/7795 , H03K4/06 , H04N25/78 , H04N25/77
摘要： A ramp signal generator includes a clock divider configured to generate a plurality of ramp clocks having different clocks, an output bit selector configured to select an output bit for reading out a pixel signal based on an analog gain of a ramp signal, a ramp clock controller configured to set a clock corresponding to the output bit, from among the plurality of ramp clocks, as a ramp clock, and a ramp offset controller configured to set an offset value corresponding to the output bit, from among a plurality of offset values, as a ramp offset value.
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公开(公告)号：US20230156372A1
公开(公告)日：2023-05-18
申请号：US17986966
申请日：2022-11-15
发明人： Myeongjin OH , Jaejung PARK , Sukho SHIN , Haneul JUNG
IPC分类号： H04N5/3745 , H03M1/76 , H04N5/378
CPC分类号： H04N5/37455 , H03M1/76 , H04N5/378
摘要： A digital-to-analog converter includes a first channel configured to output a first ramp voltage through an output node, and a first bias circuit configured to apply a bias voltage to the first channel. The first channel comprises a plurality of current cells connected to the first bias circuit, a plurality of selection circuits and a plurality of switches, and a first resistor connected to the output node. Each of the plurality of selection circuits of the first channel comprises a first selection circuit configured to connect a current of one of the plurality of current cells to the first resistor in accordance with a first digital input signal, and a second selection circuit configured to connect the current of the current cell to one of the plurality of switches corresponding to the current cell in accordance with a second digital input signal complementary to the first digital input signal.
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4.发明公开公开(公告)号：US20240236528A9
公开(公告)日：2024-07-11
申请号：US18141164
申请日：2023-04-28
发明人： Dongjae HAN , Haneul JUNG , YOUNGHYUN YOON
CPC分类号： H04N25/78 , H03K4/48 , H04N25/616
摘要： Disclosed is a ramp signal generator. The ramp signal generator includes: a first unit current source including first sub-unit current sources, and configured to output a first unit current during a first time period; and a second unit current source including second sub-unit current sources, and configured to output a second unit current during a second time period. The first sub-unit current sources are configured to operate according to first sub-ramp control signals, respectively. The second sub-unit current sources are configured to operate according to second sub-ramp control signals, respectively. n first sub-ramp control signals among the first sub-ramp control signals are activated, and m sub-ramp control signals among the second sub-ramp control signals are activated, n and m being different natural numbers.
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5.发明公开公开(公告)号：US20240179434A1
公开(公告)日：2024-05-30
申请号：US18467318
申请日：2023-09-14
发明人： Dongjae HAN , Jaejung PARK , Seunghyun LIM , Haneul JUNG
IPC分类号： H04N25/75 , H04N25/616 , H04N25/65
CPC分类号： H04N25/75 , H04N25/616 , H04N25/65
摘要： A ramp signal generator may include a current cell unit including a plurality of current sources configured to generate current signals, and a resistance unit connected to an output terminal of the current cell unit. The resistance unit may include a load resistor and an offset resistor connected in series with the load resistor and having a resistance based on analog gains.
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公开(公告)号：US20240163582A1
公开(公告)日：2024-05-16
申请号：US18213032
申请日：2023-06-22
发明人： Younghyun YOON , Haneul JUNG , Dongjae HAN
IPC分类号： H04N25/767 , H04N25/616 , H04N25/772
CPC分类号： H04N25/767 , H04N25/616 , H04N25/772
摘要： A ramp signal generating device and an image sensor for decreasing the latency of a ramp signal are provided. The ramp signal generating device may include a first circuit configured to detect a capacitance of a parasitic capacitor, a second circuit configured to charge the parasitic capacitor with a first voltage, and a third circuit configured to receive the capacitance as an input to generate a load current causing the ramp signal with a predetermined slope.
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公开(公告)号：US20240147089A1
公开(公告)日：2024-05-02
申请号：US18325507
申请日：2023-05-30
发明人： Yongsuk CHOI , Younghyun YOON , Haneul JUNG , Dongjae HAN
IPC分类号： H04N25/60 , H04N25/772
CPC分类号： H04N25/60 , H04N25/772
摘要： An image sensor includes a pixel array connected to a plurality of column lines, a first ramp signal generator generating a first ramp signal, a second ramp signal generator generating a second ramp signal, and an analog-to-digital conversion (ADC) circuit operating in a first mode. The ADC circuit includes a first comparator group comparing the first ramp signal with a first pixel signal received from a first column line group, among the plurality of column lines, and a second comparator group comparing the second ramp signal with a second pixel signal received from a second column line group, among the plurality of column lines. The comparing of the first ramp signal occurs at a comparison time point different from a comparison time point during which the comparing of the second ramp signal occurs.
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8.发明公开公开(公告)号：US20240137672A1
公开(公告)日：2024-04-25
申请号：US18141164
申请日：2023-04-27
发明人： Dongjae HAN , Haneul JUNG , YOUNGHYUN YOON
CPC分类号： H04N25/78 , H03K4/48 , H04N25/616
摘要： Disclosed is a ramp signal generator. The ramp signal generator includes: a first unit current source including first sub-unit current sources, and configured to output a first unit current during a first time period; and a second unit current source including second sub-unit current sources, and configured to output a second unit current during a second time period. The first sub-unit current sources are configured to operate according to first sub-ramp control signals, respectively. The second sub-unit current sources are configured to operate according to second sub-ramp control signals, respectively. n first sub-ramp control signals among the first sub-ramp control signals are activated, and m sub-ramp control signals among the second sub-ramp control signals are activated, n and m being different natural numbers.
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