Abstract:
A digital input to a digital-to-analog converter (DAC) is divided into a most significant portion and a lesser significant portion. At least one tap voltage generator generates a plurality of voltages, preferably using a resistor string. A decoder decodes at least one subword that forms the lesser significant portion to generate a corresponding at least one control signal. A switching unit accesses voltages generated by the at least one tap voltage generator in response to the at least one control signal. A scaled current generator generates a respective weighted current from each accessed voltage. An output stage combines all the weighted currents with a voltage that is an analog representation of the most significant portion of the digital input to generate an analog approximation of the entire digital input.
Abstract:
An analog to digital converter comprising at least one sampling capacitor connected to a sample node, and a pre-charge circuit arranged to cause the voltage on the sample node to substantially match the input voltage prior to the analog to digital converter entering an acquire mode in which the sample node is connected to the input node by a sample switch.
Abstract:
Integrated crash and vehicle movement sensing by use of distributed new multi-axis satellite sensors (302, 304, 306) combines side and/ or front/rear crash sensing with other applications requiring dynamic vehicle movement data like (but not limited to) roll and/or pitch detection as well as active suspension, head light beam levelling, etc. Depending on the required functionality, two or more satellite sensor modules (302, 304, 306) are used, which measure multi-axis high-g and low-g acceleration, without needing any further sensor inputs like gyroscopes while achieving a high level of failsafe and redundancy.
Abstract:
An analog to digital converter comprising at least one sampling capacitor connected to a sample node, and a pre-charge circuit arranged to cause the voltage on the sample node to substantially match the input voltage prior to the analog to digital converter entering an acquire mode in which the sample node is connected to the input node by a sample switch.
Abstract:
A multi-string DAC is described and comprises at least two DAC stages. Each DAC stage comprises a string of impedance elements and a switching network. In one configuration, the DAC comprises a first and second switching network, the second switching network providing multiple switched paths which compensate for impedance effects of the second string and provides multiple state changes at the output node of the DAC.
Abstract:
An integrator system may have a pair of sampling circuits each having a sampling capacitor to sample a respective component of a differential input signal, and an integrator having inputs coupled to outputs of the sampling circuits. The system may have a shorting switch coupled between input terminals of the sampling capacitors. The shorting switch may be engaged during an interstitial phase between sampling and output phases of the sampling circuits. By shorting input terminals of the sampling capacitors together, the design reduces current drawn by the system and, in some designs, severs relationships between current draw and information content sampled by the system. Configurations are disclosed for analog and digital input signals
Abstract:
A digital input to a digital-to-analog converter (DAC) is divided into a most significant portion and a lesser significant portion. At least one tap voltage generator generates a plurality of voltages, preferably using a resistor string. A decoder decodes at least one subword that forms the lesser significant portion to generate a corresponding at least one control signal. A switching unit accesses voltages generated by the at least one tap voltage generator in response to the at least one control signal. A scaled current generator generates a respective weighted current from each accessed voltage. An output stage combines all the weighted currents with a voltage that is an analog representation of the most significant portion of the digital input to generate an analog approximation of the entire digital input.
Abstract:
An integrator system may have a pair of sampling circuits each having a sampling capacitor to sample a respective component of a differential input signal, and an integrator having inputs coupled to outputs of the sampling circuits. The system may have a shorting switch coupled between input terminals of the sampling capacitors. The shorting switch may be engaged during an interstitial phase between sampling and output phases of the sampling circuits. By shorting input terminals of the sampling capacitors together, the design reduces current drawn by the system and, in some designs, severs relationships between current draw and information content sampled by the system. Configurations are disclosed for analog and digital input signals
Abstract in simplified Chinese:本发明揭示一种积分器系统,该积分器系统可具有:一对采样电路,各采样电路具有一采样电容器,用以对一差动输入信号之一各别分量进行采样;及一积分器,其具有耦合至该等采样电路之输出之输入。该系统可具有耦合于该等采样电容器之输入端子之间的一短路开关。可在该等采样电路之采样阶段与输出阶段之间的一间隙阶段期间衔接该短路开关。借由使该等采样电容器之输入端子一起短路,本设计减小由该系统汲取之电流且在某些设计中断绝由该系统汲取之电流与由该系统采样之信息内容之间的关系。针对模拟及数码输入信号揭示组态。
Abstract in simplified Chinese:本发明揭露一种低成本系统,其包含用以将信息编码之图样,以及用于将图样中所编码之信息加以译码之译码器。特别是,该机制采用了电容式传感技术。复数个电极被排列设置(或于操作中被激发)以使其每个电极产生电场,并传感图样置于电极上时所产生的电场干扰现象。图样之空间设置可使信息编码于一条带或一表面上,并借由电容式传感器以测定由可能图样所导致之干扰现象。所得的方案比光学方案更便宜且简单,例如,条码和光学条码阅读器。借此,本发明手段之成本较低,且复杂度低于条码或光学条码读码器之光学手段。此机构可用于血糖检测器中,以对于血糖检测条进行编码与译码,以辨别各批次检测条信息。