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1. 发明申请

WO1996021271A1 OPEN-LOOP, DIFFERENTIAL AMPLIFIER WITH ACCURATE AND STABLE GAIN 审中-公开
标题翻译： OPEN-LOOP，具有精确和稳定增益的差分放大器
公开(公告)号：WO1996021271A1
公开(公告)日：1996-07-11
申请号：PCT/US1995014088
申请日：1995-11-01
申请人： ANALOG DEVICES, INC.
发明人： ANALOG DEVICES, INC. , TICE, Thomas, E. , CROOK, David, T. , KATTMAN, Kevin, M. , LANE, Charles, D.
IPC分类号： H03F03/45
CPC分类号： H03F3/45098 , H03F1/083 , H03F3/45085 , H03F2203/45392 , H03F2203/45702 , H03F2203/45722 , H03F2203/5003 , H03M1/16
摘要： Open-loop differential amplifiers (120, 140) are disclosed which have accurate and stable gain. The gain of these amplifiers is substantially insensitive to the effects of small-signal emitter resistance re, current gain beta and Early voltage VA. Thus, their gain can be accurately set by resistance ratios which makes them particularly useful in integrated circuits. These advantages are obtained with an output differential pair (67) that has cross-coupled base and collector terminals. In addition, resistors (141, 143, 148, 150) and a current source (146) associated with this differential pair are related to like elements (27, 28, 24, 25 and 26) that are associated with an input differential pair (21) by disclosed numerical ratios, e.g., the nominal gain G of the amplifier. Versions of the amplifiers can be adapted for use as a residue amplifier (162) in a subranging A/D converter (160).
摘要翻译：公开了具有准确和稳定增益的开环差分放大器（120,140）。这些放大器的增益对小信号发射极电阻re，电流增益β和早期电压VA的影响基本不敏感。因此，它们的增益可以通过电阻比来精确地设定，这使得它们在集成电路中特别有用。这些优点通过具有交叉耦合的基极和集电极端子的输出差分对（67）获得。另外，与该差分对相关联的电阻（141,143,148,150）和电流源（146）与与输入差分对相关联的相似元件（27,28,24,25和26）有关， 21）通过公开的数值比例，例如放大器的标称增益G。放大器的版本可以适用于亚排A / D转换器（160）中的残留放大器（162）。

2. 发明申请

WO1996016476A1 HIGH SPEED OVERVOLTAGE DETECTION AND PROTECTION CIRCUIT 审中-公开
标题翻译：高速过压检测和保护电路
公开(公告)号：WO1996016476A1
公开(公告)日：1996-05-30
申请号：PCT/US1995014158
申请日：1995-11-01
申请人： ANALOG DEVICES, INC. (ADI)
发明人： ANALOG DEVICES, INC. (ADI) , TICE, Thomas, E. , CROOK, David, T. , KATTMAN, Kevin, M. , LANE, Charles, D.
IPC分类号： H03K05/153
CPC分类号： H03G11/00 , H03F1/52
摘要： An overvoltage protection circuit protects against saturation and damage of sensitive circuitry elements. The protection circuit includes an out-of-range detector (52) which compares an input signal to reference levels to determine if it is within a predetermined range of acceptable inputs. If the input is determined not to be within this range, a control circuit (62, 64) substitutes a supplemental signal within the range for the input signal. Digital correction can be provided to correct the output of the sensitive circuit element while the supplemental signal is being substituted. Numerous circuit designs may be used to implement the protection scheme.
摘要翻译：过压保护电路可以防止敏感电路元件的饱和和损坏。保护电路包括超出范围检测器（52），其将输入信号与参考电平进行比较，以确定其是否在可接受的输入的预定范围内。如果确定输入不在该范围内，则控制电路（62,64）将输入信号范围内的补充信号代入。可以提供数字校正以在补充信号被替代时校正敏感电路元件的输出。可以使用许多电路设计来实现保护方案。

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