公开(公告)号：US07649388B2

公开(公告)日：2010-01-19

申请号：US11396067

申请日：2006-03-31

Applicant: Luke A. Johnson ,  Yueming He

Inventor： Luke A. Johnson ,  Yueming He

IPC: H03L7/06

CPC classification number: H03K17/24

Abstract: In an embodiment, an analog voltage recovery circuit comprising a plurality of capacitors having first terminals connected to a node having the analog voltage, and comprising a state machine, where during an operating mode the second terminals of the plurality of capacitors are coupled to a first rail, and where during a digitization mode the state machine couples the second terminals of a set of the plurality of capacitors to a second rail so that the analog voltage is closer to the second rail voltage than during the beginning of the digitization mode. In an embodiment, the analog voltage recovery circuit brings the node voltage to the second rail voltage at the end of the digitization mode, and then floats the node and couples the second terminals of the plurality of capacitors to the first rail to approximately restore the analog voltage. Other embodiments are described and claimed.

Abstract translation: 在一个实施例中，模拟电压恢复电路包括具有连接到具有模拟电压的节点的第一端子的多个电容器，并且包括状态机，其中在操作模式期间，多个电容器的第二端子耦合到第一 轨道，并且在数字化模式期间，状态机将多组电容器的一组的第二端子耦合到第二轨道，使得模拟电压比数字化模式开始时更接近第二轨道电压。 在一个实施例中，模拟电压恢复电路在数字化模式结束时使节点电压达到第二轨电压，然后浮动节点并将多个电容器的第二端耦合到第一轨，以近似地恢复模拟 电压。 描述和要求保护其他实施例。

公开(公告)号：US06362666B1

公开(公告)日：2002-03-26

申请号：US09475102

申请日：1999-12-30

Applicant: Morteza Afghahi ,  Yueming He

Inventor： Morteza Afghahi ,  Yueming He

IPC: H03B100

CPC classification number: H03K19/01721

Abstract: An embodiment of the invention is directed to a buffer circuit having a closed loop negative feedback amplifier that is coupled to continuously drive a node to a predetermined set voltage. A precharge circuit is coupled to selectively drive the node at a higher rate than the amplifier. The buffer circuit is particularly useful for reducing the recovery and settling time of the node voltage when the node is suddenly subjected to a large, capacitive load.

Abstract translation: 本发明的实施例涉及一种具有闭环负反馈放大器的缓冲电路，其耦合以将节点连续地驱动到预定的设定电压。 耦合预充电电路以比放大器更高的速率选择性地驱动节点。 当节点突然经受大的容性负载时，缓冲电路对于降低节点电压的恢复和建立时间特别有用。