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    • 6. 发明授权
    • Offset calibration of a flash ADC array
    • 闪光ADC阵列的偏移校准
    • US6084538A
    • 2000-07-04
    • US95162
    • 1998-06-10
    • Matthew M. KostelnikRussell CromanMarius Goldenberg
    • Matthew M. KostelnikRussell CromanMarius Goldenberg
    • H03K5/24H03M1/10H03M1/36H03M1/06
    • H03M1/1023H03K5/2481H03K5/249H03M1/361
    • A system and method is disclosed for calibrating comparators of an ADC. Individual comparators may be calibrated at random or psuedo-random times while the ADC is performing conversions without the addition of extra "proxy" or replacement comparators. More particularly, at periodic intervals a psuedo-random one of the comparators may be disconnected from the standard ADC circuitry for calibration. In order to prevent a significant degradation in the conversion quality, the digital logic downstream of the comparators may be designed to provide the necessary adjustments to accommodate for the removal of one of the comparators. Thus, a calibration technique is provided in which individual comparators are removed from the data conversion path during conversion and the downstream logic adjusts to accommodate for the removal of the comparator. The calibration technique is particularly advantageous for use with optical data storage systems.
    • 公开了一种用于校准ADC的比较器的系统和方法。 单个比较器可以随机或伪随机时间进行校准,而ADC不需要添加额外的“代理”或替换比较器即可执行转换。 更具体地,以周期性间隔,比较器中的伪随机的一个可以与用于校准的标准ADC电路断开连接。 为了防止转换质量的显着降低,比较器下游的数字逻辑可被设计为提供必要的调整以适应一个比较器的移除。 因此,提供校准技术,其中在转换期间从数据转换路径去除各个比较器,并且下游逻辑调整以适应于比较器的移除。 校准技术对于与光学数据存储系统一起使用是特别有利的。
    • 9. 发明授权
    • Subscriber line interface circuitry with common base audio isolation stage
    • 用户线接口电路,具有公共基本音频隔离级
    • US07486787B2
    • 2009-02-03
    • US11278405
    • 2006-03-31
    • Jerrell P. HeinMarius Goldenberg
    • Jerrell P. HeinMarius Goldenberg
    • H04M9/00
    • H04M3/005
    • Methods and apparatus for coupling outgoing analog audio signals to a subscriber line are described. One method includes the step of receiving the outgoing audio signal. The outgoing audio signal is coupled to the subscriber line through a plurality of transistors coupled in a common base configuration. In one embodiment, linefeed driver control signals for controlling battery feed to the subscriber line are received on the same signal lines as the outgoing audio signal. A subscriber line interface circuit apparatus includes a first circuit for coupling a received outgoing audio signal to a subscriber line. The first circuit couples the received outgoing audio signal to the subscriber line through a common base isolation stage. In various embodiments, the common base isolation stage comprises a plurality of bipolar junction transistors coupled in a common base configuration or a plurality of field effect transistors coupled in a common gate configuration.
    • 描述了将出口模拟音频信号耦合到用户线的方法和装置。 一种方法包括接收输出音频信号的步骤。 输出音频信号通过以公共基本配置耦合的多个晶体管耦合到用户线路。 在一个实施例中,用于控制到用户线的电池馈送的换行驱动器控制信号在与输出音频信号相同的信号线上被接收。 用户线接口电路装置包括用于将接收到的输出音频信号耦合到用户线路的第一电路。 第一电路通过公共基本隔离级将接收到的输出音频信号耦合到用户线路。 在各种实施例中,公共基极隔离级包括以公共基极配置耦合的多个双极结型晶体管或以公共栅极配置耦合的多个场效应晶体管。
    • 10. 发明授权
    • Low voltage sensing and control of battery referenced transistors in subscriber loop applications
    • 用户环路应用中电池参考晶体管的低电压感测和控制
    • US07450712B1
    • 2008-11-11
    • US09693652
    • 2000-10-21
    • Jerrell P. HeinMarius Goldenberg
    • Jerrell P. HeinMarius Goldenberg
    • H04M1/00H04M9/00
    • H04M19/005
    • A method includes the step of providing subscriber loop pull-down circuitry operating in a first voltage domain. The subscriber loop pull-down circuitry decreases at least one of a tip and a ring line current in response to a corresponding pull-down control signal. The method further includes the step of providing control circuitry operating in a second voltage domain, wherein the first and second voltage domains are substantially distinct. The control circuitry varies the pull-down control signal to decrease a selected one of the tip and ring line currents in response to a sensed current corresponding to an associated one of a tip pull-down current and a ring pull-down current. A subscriber line interface circuit apparatus includes pull-down circuitry operating in a first voltage domain. The pull-down circuitry varies line currents of the tip and ring lines in response to a pull-down control signal provided by control circuitry operating in a second voltage domain. The first and second voltage domains are substantially distinct. A control isolation stage is coupled to provide the pull-down control signals from the control circuitry to the pull-down circuitry. A feedback isolation stage provides feedback signals from the pull-down circuitry to the control circuitry. The feedback signals represent sensed pull-down currents associated with the tip and ring lines. The control circuitry provides the pull-down control signals for the tip and ring lines in response to the sensed pull-down currents.
    • 一种方法包括提供在第一电压域中操作的用户环路下拉电路的步骤。 响应于相应的下拉控制信号,用户环路下拉电路减少尖端和环线电流中的至少一个。 该方法还包括提供在第二电压域中操作的控制电路的步骤,其中第一和第二电压域基本不同。 响应于对应于尖端下拉电流和环下拉电流中相关联的一个的感测电流,控制电路改变下拉控制信号以减小尖端和环形线电流中选择的一个。 用户线接口电路装置包括在第一电压域中操作的下拉电路。 下拉电路响应由在第二电压域中操作的控制电路提供的下拉控制信号,改变尖端和环形线路的线路电流。 第一和第二电压域基本不同。 耦合控制隔离级以提供从控制电路到下拉电路的下拉控制信号。 反馈隔离级提供从下拉电路到控制电路的反馈信号。 反馈信号表示与尖端和环线相关联的感测下拉电流。 响应感测的下拉电流,控制电路为尖端和环线提供下拉控制信号。