公开(公告)号：US4806801A

公开(公告)日：1989-02-21

申请号：US90270

申请日：1987-08-27

申请人： Pramod V. Argade ,  Arupratan Gupta

发明人： Pramod V. Argade ,  Arupratan Gupta

IPC分类号： H03K19/0185 ,  H03K19/094

CPC分类号： H03K19/018521

摘要： A TTL to CMOS static input buffer, and method for making same, having a first transistor (32) of a first conductivity type, having a control terminal responsive to a TTL input signal, a first output terminal coupled to a first voltage supply (Vdd) and a second output terminal; a second transistor (31) of a second conductivity type, having a predetermined threshold voltage, a predetermined width-to-length ratio, a control terminal responsive to the TTL input signal, a first output terminal coupled to an output node and a second output terminal coupled to a second voltage supply; a third transistor (33) of the second conductivity type, having a predetermined threshold voltage, a predetermined width-to-length ratio, a control terminal coupled to an intermediate voltage source, a first output terminal coupled to the second terminal of the first transistor and a second output terminal coupled to the output node; and a CMOS inverter (35) having a predetermined threshold voltage Vb; wherein the static input buffer has a predetermined threshold voltage established by the threshold voltage of the CMOS inverter and the ratio of the width-to-length ratio of the third transistor to the width-to-length ratio of the second transistor, when the buffer is enabled by the voltage of the intermediate voltage source being substantially that of the first voltage supply.

摘要翻译： TTL至CMOS静态输入缓冲器及其制造方法，具有第一导电类型的第一晶体管（32），具有响应于TTL输入信号的控制端子，耦合到第一电压源的第一输出端（Vdd ）和第二输出端子; 第二导电类型的第二晶体管（31），具有预定的阈值电压，预定的长宽比，响应于TTL输入信号的控制端，耦合到输出节点的第一输出端和第二输出端 端子，耦合到第二电压源; 第二导电类型的第三晶体管（33）具有预定的阈值电压，预定的长宽比，耦合到中间电压源的控制端子，耦合到第一晶体管的第二端子的第一输出端子 以及耦合到所述输出节点的第二输出端子; 和具有预定阈值电压Vb的CMOS反相器（35）; 其中所述静态输入缓冲器具有由所述CMOS反相器的阈值电压建立的预定阈值电压以及所述第三晶体管的宽度与长度之比与所述第二晶体管的宽度与长度之比的比率， 由中间电压源的电压实质上是第一电压源的电压使能。

公开(公告)号：US06608889B2

公开(公告)日：2003-08-19

申请号：US09768292

申请日：2001-01-25

申请人： Charles William Berthoud ,  Paul Joseph Davis ,  Jeffrey Paul Grundvig ,  Arupratan Gupta ,  Mohd Majed Hobbi ,  Lakshmi Narayana Jampanaboyana

发明人： Charles William Berthoud ,  Paul Joseph Davis ,  Jeffrey Paul Grundvig ,  Arupratan Gupta ,  Mohd Majed Hobbi ,  Lakshmi Narayana Jampanaboyana

IPC分类号： H04M1100

CPC分类号： H04M1/72502 ,  H04M1/274516 ,  H04M2250/02

摘要： A method and apparatus for transferring convenience feature data (e.g., speed dial numbers, etc.) from one telephone to another local telephone within the same home or small office. In particular, the telephone includes a memory located within a corded or cordless telephone configured for storing data, and a transfer module configured to transfer requested data between the memory and a target device in response to a transfer request. The corded telephone utilizes a DTMF generator/receiver, a demodulation/modulation module, or a Bluetooth module to establish a communication path between the corded telephone and the target device. The cordless telephone utilizes a DTMF generator/receiver, a demodulation/modulation module, a radio frequency (RF) transceiver, or a Bluetooth module to establish a communication path between the cordless telephone and the target device. A transfer request may be a download, upload, or synchronization request between the memory of the corded or cordless telephone and the target device. By providing means to transfer data between corded or cordless telephone and a transfer device, information may be automatically shared locally or remotely between multiple devices. Moreover, telephones with corrupted memories or erased memories may be automatically updated or restored.

公开(公告)号：US09860224B2

公开(公告)日：2018-01-02

申请号：US13977579

申请日：2011-12-15

申请人： Arupratan Gupta

发明人： Arupratan Gupta

IPC分类号： G06F21/31 ,  H04L29/06 ,  H04W12/06 ,  G06F3/023 ,  G06F3/0488 ,  G06F21/60 ,  G06F21/83 ,  G06Q20/32 ,  G06Q20/40 ,  G07F7/10 ,  H04W4/00

CPC分类号： H04L63/08 ,  G06F3/0233 ,  G06F3/0238 ,  G06F3/04886 ,  G06F21/31 ,  G06F21/606 ,  G06F21/83 ,  G06Q20/3278 ,  G06Q20/4012 ,  G07F7/1041 ,  H04W4/80 ,  H04W12/06

摘要： Techniques for improving security of transactions requesting user authentication data entry via mobile devices are described herein. The mobile device is configured to wirelessly communicate using a near field communications (NFC) standard used to communicate over very short distances. The mobile device includes a graphical user interface (GUI) configured to display a virtual keypad arranged in a randomly generated pattern, the pattern being configured to be changed in a random manner at each instance of displaying the virtual keypad. Security of transaction is improved by randomly changing positions of virtual keys of the virtual keypad configured to receive the user authentication data.

公开(公告)号：US20140096201A1

公开(公告)日：2014-04-03

申请号：US13977579

申请日：2011-12-15

申请人： Arupratan Gupta

发明人： Arupratan Gupta

IPC分类号： H04L29/06 ,  G06F3/0488

CPC分类号： H04L63/08 ,  G06F3/0233 ,  G06F3/0238 ,  G06F3/04886 ,  G06F21/31 ,  G06F21/606 ,  G06F21/83 ,  G06Q20/3278 ,  G06Q20/4012 ,  G07F7/1041 ,  H04W4/80 ,  H04W12/06

摘要： Techniques for improving security of transactions requesting user authentication data entry via mobile devices are described herein. The mobile device is configured to wirelessly communicate using a near field communications (NFC) standard used to communicate over very short distances. The mobile device includes a graphical user interface (GUI) configured to display a virtual keypad arranged in a randomly generated pattern, the pattern being configured to be changed in a random manner at each instance of displaying the virtual keypad. Security of transaction is improved by randomly changing positions of virtual keys of the virtual keypad configured to receive the user authentication data.

摘要翻译： 本文描述了用于提高通过移动设备请求用户认证数据输入的事务的安全性的技术。 移动设备被配置为使用用于在很短距离上通信的近场通信（NFC）标准进行无线通信。 移动设备包括被配置为显示以随机生成的模式布置的虚拟小键盘的图形用户界面（GUI），该模式被配置为在显示虚拟键盘的每个实例处以随机方式改变。 通过随机改变配置成接收用户认证数据的虚拟小键盘的虚拟键的位置来提高事务的安全性。

公开(公告)号：US06370236B1

公开(公告)日：2002-04-09

申请号：US09119996

申请日：1998-07-21

申请人： Joseph M. Cannon ,  Arupratan Gupta ,  James A. Johanson

发明人： Joseph M. Cannon ,  Arupratan Gupta ,  James A. Johanson

IPC分类号： H04M164

CPC分类号： H04M1/652

摘要： A telephone answering device (TAD) and a method of controlling such TAD. In one embodiment, the TAD includes: (1) an external interface couplable to a telephone line outbound from a site, (2) an internal interface couplable to a client telephone and (3) decode circuitry, associated with the internal interface, that interprets affirmative commands received from the client telephone to allow the client telephone to control the TAD.

摘要翻译： 一种电话应答设备（TAD）和一种控制这种TAD的方法。 在一个实施例中，TAD包括：（1）外部接口，可耦合到从站点出站的电话线，（2）可连接到客户端电话的内部接口;以及（3）与内部接口相关联的解码电路， 从客户端电话接收的肯定命令，以允许客户端电话控制TAD。