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    • 2. 发明授权
    • Negative voltage generator for a semiconductor memory device
    • 用于半导体存储器件的负电压发生器
    • US07336121B2
    • 2008-02-26
    • US09901930
    • 2001-07-09
    • Jae-Yoon SimJei-Hwan Yoo
    • Jae-Yoon SimJei-Hwan Yoo
    • G05F1/10
    • G11C16/30G11C5/147H02M3/07H02M2003/071
    • A negative voltage generator is controlled responsive to a word line precharge signal. Voltage fluctuations in a negatively biased word line scheme are reduced by using a kicker circuit to provide a predetermined amount of negative charge to shut off a word line during a precharge operation. The negative voltage generator includes first and second negative charge pumps. The second charge pump is activated responsive to the word line precharge signal. A negative voltage regulator can be used to regulate a negative voltage signal. A level shifter uses two voltage dividers and a differential amplifier to reduce response time, output ripple, and sensitivity to process and temperature variations. A negative voltage regulator cancels ripple from a charge pump to provide a stable negative bias voltage and reduce the amount of charge needed to precharge a word line.
    • 响应于字线预充电信号控制负电压发生器。 负偏置字线方案中的电压波动通过使用提升电路来在预充电操作期间提供预定量的负电荷来关闭字线来减小。 负电压发生器包括第一和第二负电荷泵。 响应于字线预充电信号激活第二电荷泵。 负电压调节器可用于调节负电压信号。 电平移位器使用两个分压器和差分放大器来减少响应时间,输出纹波和对过程和温度变化的敏感性。 负电压调节器抵消来自电荷泵的纹波,以提供稳定的负偏置电压并减少预充电字线所需的电荷量。
    • 4. 发明授权
    • Negatively biased word line scheme for a semiconductor memory device
    • 用于半导体存储器件的负偏置字线方案
    • US06545923B2
    • 2003-04-08
    • US09901785
    • 2001-07-09
    • Jae-Yoon SimJei-Hwan Yoo
    • Jae-Yoon SimJei-Hwan Yoo
    • G11C808
    • G11C11/4085G11C8/08
    • A memory device utilizing a negatively biased word line scheme diverts word line discharge current from the negative voltage source during a precharge operation, thereby reducing voltage fluctuations and current consumption from the negative voltage source. A main word line, sub-word line, word line enable signal, or other type of word line is coupled to the negative voltage source during a precharge operation. The word line is also coupled to a second power supply during the precharge operation, and then uncoupled from the second power supply after most of the word line discharge current has been diverted. The negative voltage source can then discharge and maintain the word line at a negative bias.
    • 利用负偏置字线方案的存储器件在预充电操作期间从负电压源转移字线放电电流,从而降低来自负电压源的电压波动和电流消耗。 在预充电操作期间,主字线,子字线,字线使能信号或其它类型的字线耦合到负电压源。 在预充电操作期间,字线还耦合到第二电源,然后在大部分字线放电电流被转移之后与第二电源分离。 然后,负电压源可以以负偏压放电并维持字线。
    • 8. 发明授权
    • Current-mode bidirectional input/output buffer
    • 电流模式双向输入/输出缓冲器
    • US6075384A
    • 2000-06-13
    • US49739
    • 1998-03-27
    • Jae-Yoon SimHong-Joon ParkSoo-In ChoJung-Bae Lee
    • Jae-Yoon SimHong-Joon ParkSoo-In ChoJung-Bae Lee
    • H03K17/00H03K17/687H03K19/0175H03K19/0185
    • H03K19/018592
    • A bidirectional input/output buffer operates in a current mode to increase the data transfer rate between devices connected by a bidirectional transmission line. The buffer includes an output current source for generating an output current responsive to a data output signal. The output current is combined with an output current indicative of a data input signal received from another device over a transmission line, thereby forming a mixed current signal. The data input signal is restored from the mixed signal by a restoring circuit that compares the mixed signal to a reference current that depends on the value of the data output signal. The restoring circuit includes a current mirror and a reference current source that generates a reference current in response to the data output signal. To provide additional performance, an embodiment of a bidirectional input/output buffer utilizes a switchless structure having two comparators that compare the mixed signal to two different reference signals, thereby generating two comparison signals. A selector circuit selects one of the two comparison signals as the restored data input signal responsive to the data output signal.
    • 双向输入/输出缓冲器以当前模式工作,以增加通过双向传输线连接的设备之间的数据传输速率。 缓冲器包括用于响应于数据输出信号产生输出电流的输出电流源。 输出电流与表示通过传输线从另一设备接收的数据输入信号的输出电流组合,从而形成混合电流信号。 数据输入信号通过将混合信号与取决于数据输出信号的值的参考电流进行比较的恢复电路从混合信号中恢复。 恢复电路包括响应于数据输出信号产生参考电流的电流镜和参考电流源。 为了提供额外的性能,双向输入/输出缓冲器的实施例利用具有两个比较器的无开关结构,其将混合信号与两个不同的参考信号进行比较,从而产生两个比较信号。 选择器电路根据数据输出信号选择两个比较信号中的一个作为恢复的数据输入信号。
    • 10. 发明申请
    • Negative voltage generator for a semiconductor memory device
    • 用于半导体存储器件的负电压发生器
    • US20050030086A1
    • 2005-02-10
    • US10940804
    • 2004-08-26
    • Jae-Yoon SimJei-Hwan Yoo
    • Jae-Yoon SimJei-Hwan Yoo
    • G11C5/14G11C16/30H02M3/07G11C8/00
    • H02M3/07G11C5/147G11C16/30H02M2003/071
    • A negative voltage generator is controlled responsive to a word line precharge signal. Voltage fluctuations in a negatively biased word line scheme are reduced by using a kicker circuit to provide a predetermined amount of negative charge to shut off a word line during a precharge operation. The negative voltage generator includes first and second negative charge pumps. The second charge pump is activated responsive to the word line precharge signal. A negative voltage regulator can be used to regulate a negative voltage signal. A level shifter uses two voltage dividers and a differential amplifier to reduce response time, output ripple, and sensitivity to process and temperature variations. A negative voltage regulator cancels ripple from a charge pump to provide a stable negative bias voltage and reduce the amount of charge needed to precharge a word line.
    • 响应于字线预充电信号控制负电压发生器。 负偏置字线方案中的电压波动通过使用提升电路来在预充电操作期间提供预定量的负电荷来关闭字线来减小。 负电压发生器包括第一和第二负电荷泵。 响应于字线预充电信号激活第二电荷泵。 负电压调节器可用于调节负电压信号。 电平移位器使用两个分压器和差分放大器来减少响应时间,输出纹波和对过程和温度变化的敏感性。 负电压调节器抵消来自电荷泵的纹波,以提供稳定的负偏置电压并减少预充电字线所需的电荷量。