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    • 3. 发明授权
    • Dual mode (registered/unbuffered) memory interface
    • 双模式(已注册/无缓冲)存储器接口
    • US06711646B1
    • 2004-03-23
    • US09693332
    • 2000-10-20
    • Gerald R. PelissierDavid S. Hwang
    • Gerald R. PelissierDavid S. Hwang
    • G06F1314
    • G06F13/4054
    • A dual mode memory interface includes a bus switch and a register/buffer operatively coupled to the bus switch. The dual mode memory interface may include, operatively coupled to the bus switch and the register/buffer, enable/disable pins configured so that only one of the bus switch and the register/buffer is active at a time. The bus switch may be a transistor configured as a pass gate. The dual mode memory interface may be implemented in a single integrated circuit package. The dual mode memory interface may further include a system controller for detecting a type of memory module connected to the dual mode memory interface and enabling one of the bus switch and register/buffer based on the type of memory module detected.
    • 双模式存储器接口包括总线开关和可操作地耦合到总线开关的寄存器/缓冲器。 双模式存储器接口可以包括可操作地耦合到总线开关和寄存器/缓冲器,使能/禁用引脚被配置为使得总线开关和寄存器/缓冲器中的仅一个一次处于活动状态。 总线开关可以是被配置为通孔的晶体管。 双模式存储器接口可以在单个集成电路封装中实现。 双模式存储器接口还可以包括系统控制器,用于检测连接到双模式存储器接口的存储器模块的类型,并且基于检测到的存储器模块的类型启用总线开关和寄存器/缓冲器之一。
    • 4. 发明授权
    • Auto-detection and auto-enable of compact PCI bus pull-ups
    • 自动检测和自动启用紧凑型PCI总线上拉
    • US06456139B1
    • 2002-09-24
    • US09693585
    • 2000-10-20
    • Gerald R. PelissierDavid S. Hwang
    • Gerald R. PelissierDavid S. Hwang
    • H03K508
    • H03K19/017581H03K19/0136
    • A device for automatically varying resistance includes a comparator for comparing a control voltage to a reference voltage; a switch operatively coupled to the comparator; and a first resistor and second resistor operatively coupled in a series connection between a pull-up voltage and a signal line. The switch is operatively coupled in a parallel connection with the first resistor and, based on the comparison between the control voltage and the reference voltage, the switch selectively bypasses the first resistor. A method of automatically varying resistance includes comparing a control voltage and a reference voltage; pulling-up a signal line to a pull-up voltage through a first resistor and a second resistor operatively connected in series if the comparison has a first outcome; and pulling up the signal line to the pull-up voltage through only the second resistor if the comparison has a second outcome.
    • 用于自动改变电阻的装置包括用于将控制电压与参考电压进行比较的比较器; 可操作地耦合到所述比较器的开关; 以及可操作地耦合在上拉电压和信号线之间的串联连接中的第一电阻器和第二电阻器。 开关可操作地与第一电阻器并联连接,并且基于控制电压和参考电压之间的比较,开关有选择地绕过第一电阻器。 自动变化电阻的方法包括比较控制电压和参考电压; 如果比较具有第一结果,则通过第一电阻器和第二电阻器将信号线上拉至上拉电压,所述第二电阻器可操作地串联连接; 并且如果比较具有第二个结果,则仅通过第二电阻将信号线提升到上拉电压。
    • 6. 发明授权
    • Stackable dual mode (registered/unbuffered) memory interface cost reduction
    • 可堆叠双模式(注册/非缓冲)存储器接口
    • US06633948B1
    • 2003-10-14
    • US09693331
    • 2000-10-20
    • Gerald R. PelissierDavid S. Hwang
    • Gerald R. PelissierDavid S. Hwang
    • G06F1200
    • G06F13/1673
    • A dual mode memory module includes an interface configured to receive a first memory module, a first control circuit for switching between unbuffered and registered/buffered modes, an interface configured to receive a second memory module, and a second control circuit for switching the operation of the second memory module between unbuffered and registered/buffered modes. The control circuit may include a bus switch and a register/buffer operatively coupled to the bus switch. Enable/disable pins may be included operatively coupled to the first bus switch and the first register/buffer and configured so that only one of the first bus switch and the first register/buffer is active at a time. A system controller for detecting a type of memory module connected to the stackable dual mode memory interface and enabling one of the bus switch and register/buffer based on the type of memory module detected may be included.
    • 双模式存储器模块包括被配置为接收第一存储器模块的接口,用于在非缓冲模式和已注册/缓冲模式之间切换的第一控制电路,被配置为接收第二存储器模块的接口和用于切换第二存储器模块的操作的第二控制电路 第二个内存模块在无缓冲和已注册/缓冲模式之间。 控制电路可以包括总线开关和可操作地耦合到总线开关的寄存器/缓冲器。 启用/禁用引脚可以包括可操作地耦合到第一总线开关和第一寄存器/缓冲器并且被配置为使得一次只有第一总线开关和第一寄存器/缓冲器中的仅一个处于活动状态。 可以包括用于检测连接到可堆叠双模式存储器接口的存储器模块的类型的系统控制器,并且可以基于检测到的存储器模块的类型启用总线开关和寄存器/缓冲器中的一个。
    • 7. 发明授权
    • Universal compact PCI pull-up/termination IC
    • 通用紧凑型PCI上拉/终端IC
    • US06441595B1
    • 2002-08-27
    • US09693447
    • 2000-10-20
    • Gerald R. PelissierDavid S. Hwang
    • Gerald R. PelissierDavid S. Hwang
    • G05F140
    • G06F13/4086
    • A device for automatically providing variable resistance includes a comparator for comparing a reference voltage to an operating voltage, a first switch operatively coupled to the comparator, a first resistor operatively coupled with the first switch in a series connection between a pull-up voltage and a signal line, a second switch operatively coupled to the comparator, and a second resistor operatively coupled in a series connection with the second switch between the pull-up voltage and the signal line. The first switch selectively electrically enables the connection between the pull-up voltage and the signal line through the first resistor based on the comparison between the reference voltage and the operating voltage and the second switch selectively electrically enables the connection between the pull-up voltage and the signal line through the second resistor based on the comparison between the reference voltage and operating voltage. A method of automatically providing variable resistance includes comparing a control voltage and a reference voltage, selectively pulling-up a signal line to a pull-up voltage through a first resistor and a first switch operatively connected in series if the comparison has a first outcome, and selectively pulling-up the signal line to the pull-up voltage through a second resistor and a second switch operatively connected in series if the comparison has a second outcome.
    • 用于自动提供可变电阻的装置包括用于将参考电压与工作电压进行比较的比较器,可操作地耦合到所述比较器的第一开关,与所述第一开关操作耦合的第一电阻器,所述第一电阻器在上拉电压和 信号线,可操作地耦合到比较器的第二开关,以及在上拉电压和信号线之间与第二开关串联连接的第二电阻器。 基于参考电压和工作电压之间的比较,第一开关选择性地电通过第一电阻器实现上拉电压和信号线之间的连接,并且第二开关选择性地使得能够连接上拉电压和 基于参考电压和工作电压之间的比较,通过第二电阻的信号线。 自动提供可变电阻的方法包括比较控制电压和参考电压,如果比较具有第一结果,则通过第一电阻器和可操作地串联连接的第一开关选择性地将信号线上拉到上拉电压, 以及如果所述比较具有第二结果,则通过第二电阻器和可操作地串联连接的第二开关选择性地将所述信号线上拉到所述上拉电压。