公开(公告)号：US08279007B2

公开(公告)日：2012-10-02

申请号：US12995279

申请日：2010-10-21

申请人： ChangMing Wei ,  Yu Zhang ,  Lixin Jiang ,  JinFu Chen ,  Jeffrey G. Barrow

发明人： ChangMing Wei ,  Yu Zhang ,  Lixin Jiang ,  JinFu Chen ,  Jeffrey G. Barrow

IPC分类号： H03G3/30

CPC分类号： H03F3/45475 ,  H03F2203/45534 ,  H03F2203/45536 ,  H03G1/0088 ,  H03K17/063 ,  H03K17/6872 ,  H03K17/6877 ,  H03K2017/066 ,  H03K2217/0054

摘要： A switch circuit is provided. The switch circuit may include a first transistor having a source terminal to accept an input signal, a drain terminal to provide an output signal, and a gate; a power supply providing a gate voltage. The switch circuit may also include a circuit to couple a switch signal to the gate, wherein the circuit turns the first transistor ‘off’ for all values of the input signal when the switch signal is ‘low.’ A programmable gain amplifier (PGA) is also provided. The PGA may include an input stage having an input node to couple an input signal, and an output node to provide a gate signal, at least a first gain stage including a resistor and a switch circuit as above. A differential gain amplifier may be included to provide an output signal from the gain signal.

摘要翻译： 提供开关电路。 开关电路可以包括具有用于接收输入信号的源极端子的第一晶体管，提供输出信号的漏极端子和栅极; 提供栅极电压的电源。 开关电路还可以包括用于将开关信号耦合到栅极的电路，其中当开关信号为低时，该电路关闭所有输入信号值。 还提供可编程增益放大器（PGA）。 PGA可以包括输入级，其具有用于耦合输入信号的输入节点和输出节点以提供门信号，至少第一增益级包括如上所述的电阻器和开关电路。 可以包括差分增益放大器以从增益信号提供输出信号。

公开(公告)号：US07786917B2

公开(公告)日：2010-08-31

申请号：US12218397

申请日：2008-07-14

申请人： Pengfei Hu ,  JinFu Chen ,  Qinghua Yue

发明人： Pengfei Hu ,  JinFu Chen ,  Qinghua Yue

IPC分类号： H03M1/66

CPC分类号： H03M1/68 ,  H03M1/804

摘要： A digital-to-analog converter is disclosed for converting a digital signal into its analog equivalent. The digital-to-analog converter includes a two switches capable of coupling circuit nodes to ground, a scaling capacitor having a capacitance value that equals a unit capacitance value, a first array of capacitors coupled to the first circuit node and a first switching array which couples the first array of capacitors to either ground or a reference voltage depending on the digital values of the least significant bits of the digital word being converted, a second array of capacitors coupled to the second circuit node and a second switching array which couples the second array of capacitors to either ground or the reference voltage depending on the digital values of the most significant bits of the digital word being converted.

摘要翻译： 公开了一种数模转换器，用于将数字信号转换为其模拟等效。 数模转换器包括能够将电路节点耦合到地的两个开关，具有等于单位电容值的电容值的缩放电容器，耦合到第一电路节点的第一电容器阵列和第一开关阵列， 取决于正在转换的数字字的最低有效位的数字值，耦合到第二电路节点的第二电容器阵列和耦合第二电容器的第二开关阵列，将第一阵列电容器耦合到接地或参考电压; 根据要转换的数字字的最高有效位的数字值，电容器阵列到接地或参考电压。

公开(公告)号：US20100007539A1

公开(公告)日：2010-01-14

申请号：US12218397

申请日：2008-07-14

申请人： Pengfei Hu ,  JinFu Chen ,  Qinghua Yue

发明人： Pengfei Hu ,  JinFu Chen ,  Qinghua Yue

IPC分类号： H03M1/66

CPC分类号： H03M1/68 ,  H03M1/804

摘要： A digital-to-analog converter is disclosed for converting a digital signal into its analog equivalent. The digital-to-analog converter includes a switch capable of coupling a first and a second circuit node to ground, a scaling capacitor having a capacitance value that equals a unit capacitance value coupled between the first and the second circuit node, a first array of capacitors coupled to the first circuit node, a first switching array configured to selectively couple the first array of capacitors to either ground or a reference voltage depending on the digital values of the least significant bits of the digital word being converted, a second array of capacitors coupled to the second circuit node, and a second switching array configured to selectively couple the second array of capacitors to either ground or the reference voltage depending on the digital values of the most significant bits of the digital word being converted.

摘要翻译： 公开了一种数模转换器，用于将数字信号转换为其模拟等效。 数模转换器包括能够将第一和第二电路节点耦合到地的开关，具有等于耦合在第一和第二电路节点之间的单位电容值的电容值的缩放电容器，第一阵列 耦合到第一电路节点的电容器，第一开关阵列，被配置为根据正被转换的数字字的最低有效位的数字值，将第一阵列电容器选择性地耦合到接地或参考电压;第二电容阵列 耦合到第二电路节点，以及第二开关阵列，其被配置为根据所转换的数字字的最高有效位的数字值，将第二电容阵列选择性地耦合到接地或参考电压。