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公开(公告)号：US20110156871A1
公开(公告)日：2011-06-30
申请号：US12650308
申请日：2009-12-30
IPC分类号： H04B7/005
CPC分类号： H04B5/0062 , H04B5/0068
摘要： Disclosed are a device and a method for calibrating a frequency of a transponder applicable to an RFID system. The device may comprises: a pulse generating unit configured to generate a sequence of pulses based on a PIE symbol sequence from an interrogator of the RFID system; a counting unit configured to count clock cycles of a clock signal based on the generated pulses, wherein the transponder operates based on the clock signal; and a calibrating unit configured to calibrate a frequency of the clock signal towards a target frequency based on a comparison of the counted number of clock cycles with a reference number associated with the target frequency.
摘要翻译： 公开了一种用于校准适用于RFID系统的应答器的频率的装置和方法。 该装置可以包括：脉冲产生单元，被配置为基于来自RFID系统的询问器的PIE符号序列生成脉冲序列; 计数单元，被配置为基于所生成的脉冲对时钟信号的时钟周期进行计数，其中所述应答器基于所述时钟信号进行操作; 以及校准单元，其被配置为基于计数的时钟周期数与与目标频率相关联的参考数的比较来校准朝向目标频率的时钟信号的频率。
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2.发明申请LOW VOLTAGE DIGITAL TO ANALOG CONVERTER, COMPARATOR AND SIGMA-DELTA MODULATOR CIRCUITS 有权模拟转换器，比较器和SIGMA-DELTA调制器电路的低电压数字公开(公告)号：US20090303094A1
公开(公告)日：2009-12-10
申请号：US11663378
申请日：2005-09-20
CPC分类号： H03K5/22 , H03F3/45071 , H03F2200/331
摘要： Circuits that operate with power supplies of less than 1 Volt are presented. More particularly, circuits that operate with supply voltages near or lower than the threshold voltage of the transistors in those circuits are presented. Various circuits embodiments such as operational transconductance amplifiers (1101, 1102, 1103), biasing circuits, integrators (1113, 1123, 1133), continuous-time sigma delta modulators, track-and-hold circuits, and others are presented. The techniques and circuits can be used in a wide range of applications and various transistors from metal-oxide-semiconductor to bipolar junction transistors may implement the techniques presented herein.
摘要翻译： 介绍使用电源小于1伏的电路。 更具体地，提供了在这些电路中接近或低于晶体管的阈值电压的电源电压下工作的电路。 提出了诸如运算跨导放大器（1101,1102,1103），偏置电路，积分器（1113,1123,1133），连续时间Σ-Δ调制器，跟踪和保持电路等的各种电路实施例。 技术和电路可以用于广泛的应用中，并且从金属氧化物半导体到双极结型晶体管的各种晶体管可以实现本文提出的技术。
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3.发明授权Low voltage digital to analog converter, comparator and sigma-delta modulator circuits 有权低压数模转换器，比较器和Σ-Δ调制器电路公开(公告)号：US08305247B2
公开(公告)日：2012-11-06
申请号：US11663378
申请日：2005-09-20
IPC分类号： H03M1/66
CPC分类号： H03K5/22 , H03F3/45071 , H03F2200/331
摘要： Circuits that operate with power supplies of less than 1 Volt are presented. More particularly, circuits that operate with supply voltages near or lower than the threshold voltage of the transistors in those circuits are presented. Various circuits embodiments such as operational transconductance amplifiers (1101, 1102, 1103), biasing circuits, integrators (1113, 1123, 1133), continuous-time sigma delta modulators, track-and-hold circuits, and others are presented. The techniques and circuits can be used in a wide range of applications and various transistors from metal-oxide-semiconductor to bipolar junction transistors may implement the techniques presented herein.
摘要翻译： 介绍使用电源小于1伏的电路。 更具体地，提供了在这些电路中接近或低于晶体管的阈值电压的电源电压下工作的电路。 提出了诸如运算跨导放大器（1101,1102,1103），偏置电路，积分器（1113,1123,1133），连续时间Σ-Δ调制器，跟踪和保持电路等的各种电路实施例。 技术和电路可以用于广泛的应用中，并且从金属氧化物半导体到双极结型晶体管的各种晶体管可以实现本文提出的技术。
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公开(公告)号：US20090140900A1
公开(公告)日：2009-06-04
申请号：US12169520
申请日：2008-07-08
摘要： Disclosed are a sensor interface device and an amplifier used in a sensor system. The sensor interface device in one implementation has a first chopper configured to shift input signals of the sensor system from a baseband frequency to a first frequency, an instrumentation amplifier configured to amplify the shifted signals, a bandpass Delta-Sigma modulator configured to digitize the amplified signals, and a second chopper configured to shift the digitized signals from the a first frequency back to the baseband frequency. The instrumentation amplifier removes the DC offset generated from the first chopper and therefore all sources of DC offset are eliminated in this interface device without bandwidth limitation.
摘要翻译： 公开了一种用于传感器系统的传感器接口装置和放大器。 一个实施例中的传感器接口装置具有第一斩波器，其被配置为将传感器系统的输入信号从基带频率移位到第一频率，被配置为放大移位信号的仪表放大器，被配置为将放大的 信号，以及第二斩波器，被配置为将数字化信号从第一频率返回到基带频率。 仪表放大器消除了从第一个斩波器产生的直流偏移，因此在该接口器件中不会出现带宽限制的所有直流偏移源。
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公开(公告)号：US07724170B2
公开(公告)日：2010-05-25
申请号：US12169520
申请日：2008-07-08
IPC分类号： H03M3/00
摘要： Disclosed are a sensor interface device and an amplifier used in a sensor system. The sensor interface device in one implementation has a first chopper configured to shift input signals of the sensor system from a baseband frequency to a first frequency, an instrumentation amplifier configured to amplify the shifted signals, a bandpass Delta-Sigma modulator configured to digitize the amplified signals, and a second chopper configured to shift the digitized signals from the a first frequency back to the baseband frequency. The instrumentation amplifier removes the DC offset generated from the first chopper and therefore all sources of DC offset are eliminated in this interface device without bandwidth limitation.
摘要翻译： 公开了一种用于传感器系统的传感器接口装置和放大器。 一个实施例中的传感器接口装置具有第一斩波器，其被配置为将传感器系统的输入信号从基带频率移位到第一频率，被配置为放大移位信号的仪表放大器，被配置为将放大的 信号，以及第二斩波器，被配置为将数字化信号从第一频率返回到基带频率。 仪表放大器消除了从第一个斩波器产生的直流偏移，因此在该接口器件中不会出现带宽限制的所有直流偏移源。
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