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1. 发明申请

US20060139193A1 Continuous-time-sigma-delta DAC using chopper stabalisation 有权
标题翻译：使用斩波稳定的连续时间 - Σ-ΔDAC
公开(公告)号：US20060139193A1
公开(公告)日：2006-06-29
申请号：US11228114
申请日：2005-09-16
申请人： Paul Morrow , Maria Chamarro Marti , Colin Lyden , Mike Keane , Robert Adams , Richard O'Brien , Paschal Minogue , Hans Mansson , Atsushi Matamura , Andrew Abo
发明人： Paul Morrow , Maria Chamarro Marti , Colin Lyden , Mike Keane , Robert Adams , Richard O'Brien , Paschal Minogue , Hans Mansson , Atsushi Matamura , Andrew Abo
IPC分类号： H03M3/00
CPC分类号： H03M3/34 , H03M3/502
摘要： A sigma-delta digital-to-analog converter comprises a current digital-to-analog converter (IDAC) stage which generates a current depending on an input digital signal. An output current-to-voltage converter converts the generated signal to a voltage on a continuous-time basis. The amplifier used in the output current-to-voltage converter is chopper-stabilized. The converter can be single bit or multi-bit. The IDAC stage can be implemented with a pair of branches, a first branch comprising a first biasing current source and a second branch comprising a second biasing current source. The biasing current sources can be chopper-stabilized by connecting the bias current sources to the output current-to-voltage converter by a set of switches. The switches connect the biasing current sources to the output current-to-voltage converter in a first configuration and a second, reversed, configuration. This modulates flicker noise contributed by the bias current sources to the chopping frequency. from where it can be removed by filtering downstream of the current-to-voltage converter.
摘要翻译： Σ-Δ数模转换器包括根据输入数字信号产生电流的当前数模转换器（IDAC）级。输出电流 - 电压转换器将生成的信号连续地转换成电压。在输出电流 - 电压转换器中使用的放大器是斩波稳定的。转换器可以是单位或多位。 IDAC级可以用一对分支来实现，第一分支包括第一偏置电流源和包括第二偏置电流源的第二分支。通过一组开关将偏置电流源连接到输出电流 - 电压转换器，可以对偏置电流源进行斩波稳定。开关将偏置电流源以第一配置和第二反向配置连接到输出电流 - 电压转换器。这将调制由偏置电流源提供的闪烁噪声到斩波频率。从那里可以通过对电流 - 电压转换器的下游进行滤波来去除。

2. 发明申请

US20060139192A1 Differential front-end continuous-time sigma-delta ADC using chopper stabilisation 有权
标题翻译：差分前端连续时间Σ-ΔADC使用斩波稳定
公开(公告)号：US20060139192A1
公开(公告)日：2006-06-29
申请号：US11228113
申请日：2005-09-16
申请人： Paul Morrow , Maria del Mar Chamarro Marti , Colin Lyden , Mike Keane , Robert Adams , Richard O'Brien , Paschal Minogue , Hans Mansson
发明人： Paul Morrow , Maria del Mar Chamarro Marti , Colin Lyden , Mike Keane , Robert Adams , Richard O'Brien , Paschal Minogue , Hans Mansson
IPC分类号： H03M3/00
CPC分类号： H03M3/34 , H03M3/332 , H03M3/424 , H03M3/454
摘要： A multi-bit continuous-time sigma-delta analog-to-digital converter (ADC) has a differential input stage which receives an analog input signal current. A multi-bit feedback current digital-to-analog converter (IDAC) generates a multi-level feedback current depending on a digital feedback signal from a flash ADC. An integrator has a differential input that integrates the difference of the generated current by the multi-bit IDAC and the input signal current on a continuous-time basis. The input stage further comprises a first biasing current source and a second biasing current source which bias the input stage in a mid-scale condition. A first summing node connects to the first differential input line, a first differential input of the integrator and the first output branch. A second summing node connects to the second differential input line, a second differential input of the integrator and the second output branch. A set of chopping switches alternately connect the biasing current sources to the summing nodes in a first configuration and a second, reversed, configuration. The converter receives a modulator clock signal at a frequency FS and the chopping switches can operate at FS or a binary subdivision thereof. The integrator amplifier can also be chopper-stabilized.
摘要翻译：多位连续时间Σ-Δ模数转换器（ADC）具有接收模拟输入信号电流的差分输入级。多位反馈电流数模转换器（IDAC）根据闪存ADC的数字反馈信号产生多电平反馈电流。积分器具有差分输入，其通过多位IDAC产生的电流与输入信号电流的连续时间积分。输入级还包括第一偏置电流源和在中等尺度条件下偏置输入级的第二偏置电流源。第一求和节点连接到第一差分输入线，积分器的第一差分输入和第一输出分支。第二求和节点连接到第二差分输入线，积分器和第二输出分支的第二差分输入。一组斩波开关将偏置电流源以第一配置和第二反向配置交替地连接到求和节点。转换器以频率F S S接收调制器时钟信号，并且斩波开关可以在F S或其二进制细分上工作。积分放大器也可以斩波稳定。

3. 发明授权

US06256878B1 IC card housing and method of manufacture 失效
标题翻译： IC卡外壳及其制造方法
公开(公告)号：US06256878B1
公开(公告)日：2001-07-10
申请号：US09161820
申请日：1998-09-28
申请人： Mike Keane
发明人： Mike Keane
IPC分类号： H05K330
CPC分类号： H05K5/0269 , Y10T29/4913 , Y10T29/49146
摘要： A method is provided for manufacturing a housing for containing an IC card. The method includes the steps of stamping a pair of metal covers with at least one of the covers having a continuous uninterrupted edge provided with a plurality of through holes spaced inwardly of and along the edge. The covers are placed into a mold for an injection molding process. Plastic support members are injected into the mold into attachment with the covers. Plastic material of the support member surrounds the edge and flows through the holes of the cover. The covers and attached support members are removed from the mold, and the support members are bonded together so that a housing is formed with the covers and within which the IC card can be contained.
摘要翻译：提供了一种用于制造用于容纳IC卡的外壳的方法。该方法包括以下步骤：冲压一对金属盖，其中至少一个盖具有连续的不间断边缘，该连续的不间断边缘设置有沿边缘向内间隔开的多个通孔。将盖放置在用于注射成型工艺的模具中。将塑料支撑构件注入到模具中以与盖连接。支撑构件的塑料材料围绕边缘并流过盖的孔。盖和附接的支撑构件从模具中移除，并且支撑构件结合在一起，使得壳体形成有盖并且可以容纳IC卡。

4. 发明授权

US6129570A Card receptacle assembly 失效
标题翻译：卡插座组件
公开(公告)号：US6129570A
公开(公告)日：2000-10-10
申请号：US206915
申请日：1998-12-07
申请人： Patrick Griffin , Mike Keane
发明人： Patrick Griffin , Mike Keane
IPC分类号： G06K17/00 , G06K7/00 , H01R12/18 , H01R13/15
CPC分类号： G06K7/0026 , G06K7/0021
摘要： A card reader is provided for a chip card having card contacts. The card reader includes a housing having a card receiving mouth and a plurality of receptacle contacts having resilient contact portions for engaging the card contacts after the card is inserted through the mouth to a fully inserted position. An actuator is movably mounted on the housing for movement between an inoperative position and an actuating position. In the inoperative position, the actuator allows the card to be inserted past the contact portions toward its fully inserted position with substantially zero force on the contact portions. In the actuating position, the actuator biases the card contacts into engagement with the contact portions of the receptacle contacts. The actuator includes a biasing portion for biasing the card and the card contacts against the contact portions of the receptacle contacts. The actuator includes an actuating portion engageable by the card when at its fully inserted position to move the actuator from its inoperative position to its actuating position.
摘要翻译：为具有卡片接触的芯片卡提供读卡器。读卡机包括具有卡接收口的壳体和具有弹性接触部分的多个插座触头，用于在将卡插入到完全插入位置之后接合卡触点。致动器可移动地安装在壳体上，用于在不工作位置和致动位置之间移动。在非工作位置，致动器允许卡以接近部分上的大致零力将插入穿过接触部分的方式朝向其完全插入位置。在致动位置，致动器将卡触点偏压到与插座触点的接触部分接合。致动器包括用于偏置卡的偏置部分和卡触点抵靠插座触点的接触部分。致动器包括致动部分，当致动部分处于其完全插入位置时可由卡接合，以将致动器从其不工作位置移动到其致动位置。

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