公开(公告)号：EP2145388B1

公开(公告)日：2017-03-15

申请号：EP08755376.4

申请日：2008-05-13

申请人： Microchip Technology Incorporated

发明人： WANG, Guoli ,  THOMSEN, Joseph, A. ,  COOPER, Russell, E.

IPC分类号： H03K19/0185 ,  H03K19/003

CPC分类号： H03K19/018571 ,  H03K19/003 ,  H03K19/00315

公开(公告)号：EP0932936A1

公开(公告)日：1999-08-04

申请号：EP98935670.0

申请日：1998-07-16

申请人： Microchip Technology Incorporated

发明人： COOPER, Russell, E.

IPC分类号： H03M1

CPC分类号： H03M1/0678 ,  H03M1/08 ,  H03M1/46

摘要： Apparatus and method are disclosed for successive approximation analog-to-digital conversion of a variable analog input voltage to digital form by periodic sampling thereof, using a comparator to compare the relative values of the analog input voltage amplitude in a predetermined time interval and the upper limit of a reference voltage range which is successively adjusted until it closely approximates the digital value of the sampled analog input voltage in that time interval. The successive adjustment is performed by a successive approximation register which has an odd number of multiple stages, at least three, for each digital significant bit representing the upper limit of the reference voltage range to be used in the comparison. The accuracy and reliability of this upper limit is refined by using as the value of each significant bit the majority of its value in the multiple stages. After a number of comparisons that fixes the majority value of each significant bit, the resulting succession of the significant bits becomes the digital conversion of the analog input voltage in the respective time interval.

公开(公告)号：EP0780035B1

公开(公告)日：2002-09-25

申请号：EP96925272.5

申请日：1996-07-09

申请人： Microchip Technology Incorporated

发明人： COOPER, Russell, E.

IPC分类号： H03K3/0231 ,  H03K3/011

CPC分类号： H03K3/011 ,  H03K3/0231

公开(公告)号：EP2145388A1

公开(公告)日：2010-01-20

申请号：EP08755376.4

申请日：2008-05-13

申请人： Microchip Technology Incorporated

发明人： WANG, Guoli ,  THOMSEN, Joseph, A. ,  COOPER, Russell, E.

IPC分类号： H03K19/003

CPC分类号： H03K19/018571 ,  H03K19/003 ,  H03K19/00315

摘要： A five volt tolerant integrated circuit signal pad having an initial fast pull-up to three volts and then operating as an open drain output with an external resistor for pulling up the output from about three volts to about five volts. The initial fast (active) pull-up is accomplished with active devices that reduces the overall pull-up time of a newer technology (lower operating voltage) integrated circuit output when transitioning from a logic 0 to a logic 1. Circuits of the integrated circuit output driver protect the internal operating circuit nodes from excessive voltage and leakage currents that would otherwise result from a voltage on the signal pad that is more positive than the operating voltage of the integrated circuit.

摘要翻译： 一个五伏容积的集成电路信号焊盘，其初始快速上拉至三伏，然后用外部电阻器作为开漏输出工作，将输出从约三伏提升到约五伏。 初始快速（有源）上拉是通过有源器件实现的，当从逻辑0转换到逻辑1时，有源器件可以降低新技术（较低工作电压）集成电路输出的总上拉时间。集成电路的电路 输出驱动器保护内部操作电路节点不受过度的电压和漏电流的影响，否则会由于信号焊盘上的电压而导致的电压和漏电流比集成电路的工作电压更正。

公开(公告)号：EP0780035A1

公开(公告)日：1997-06-25

申请号：EP96925272.0

申请日：1996-07-09

申请人： Microchip Technology Incorporated

发明人： COOPER, Russell, E.

IPC分类号： H03K3

CPC分类号： H03K3/011 ,  H03K3/0231

摘要： An accurate RC oscillator circuit (10) for generating a signal of a predetermined frequency that accurately oscillates between two precise voltage levels, i.e., a low threshold voltage (VL) and a high threshold voltage (VH) is disclosed. The oscillator circuit uses first and second comparators (16, 18) having their outputs respectively coupled to set and reset inputs of a flip flop (20). The output of the flip flop is coupled to a series RC network for controlling the charging and discharging of the voltage across a capacitor (14) of the RC network. The interconnection (12) of the series RC network is coupled to an input of both the first and second comparators. The other input of the first comparator is coupled to a circuit (24) for applying a modified version (V'H) of the high threshold voltage such that the signal generated by the oscillator circuit does not exceed the precise high threshold voltage (VH). Likewise, the other input of the second comparator is coupled to a circuit (25) for applying a modified version (V'L) of the low threshold voltage such that the signal generated by the oscillator circuit does not fall below the precise low threshold voltage (VL).