公开(公告)号：EP2503699B1

公开(公告)日：2013-06-19

申请号：EP11159070.9

申请日：2011-03-21

Applicant: Research In Motion Limited

Inventor： Manku, Tajinder

IPC: H04B1/04 ,  H04B1/52

CPC classification number: H04B1/0475 ,  H03F1/3241 ,  H04B1/525 ,  H04B2001/0425

公开(公告)号：EP2579463A1

公开(公告)日：2013-04-10

申请号：EP11183730.8

申请日：2011-10-03

Applicant: Research In Motion Limited

Inventor： Muhammad, Khurram ,  Manku, Tajinder ,  Lebedev, Semyon

IPC: H03M1/10 ,  H03M1/00 ,  H03M1/06 ,  H03M1/20 ,  H03M1/68 ,  H03M1/74 ,  H03M1/66 ,  H03M3/02 ,  H03M3/04 ,  H03M7/00

CPC classification number: H03M1/1047 ,  H03M1/007 ,  H03M1/1042 ,  H03M1/661 ,  H03M1/68 ,  H03M1/685 ,  H03M1/687 ,  H03M1/745 ,  H03M1/747 ,  H03M7/3026 ,  H03M7/3028

Abstract: A digital-to-analog converter is disclosed. The converter includes a gradient correction module that generates a correction term based on a model of gradient error. The correction term is then applied to the signal path in the digital domain or applied to the output of the digital-to-analog converter in the analog domain. The model used to generate the correction term is based on a vertical gradient error in the array of current source elements, which may be modelled and calibrated using a second-order polynomial. Further, a digital-to-analog converter having a Nyquist DAC and an oversampled DAC is disclosed. When the oversampled DAC is enabled, the resolution of the Nyquist DAC may be increased while slowing the conversion rate.

Abstract translation: 公开了一种数模转换器。 该转换器包括梯度校正模块，该梯度校正模块基于梯度误差的模型产生校正项。 然后将校正项应用于数字域中的信号路径或应用于模拟域中的数模转换器的输出。 用于产生校正项的模型基于当前源元素阵列中的垂直梯度误差，其可以使用二阶多项式来建模和校准。 此外，公开了具有奈奎斯特DAC和过采样DAC的数模转换器。 当使能过采样DAC时，可能会增加奈奎斯特DAC的分辨率，同时降低转换速率。

公开(公告)号：EP2503699A1

公开(公告)日：2012-09-26

申请号：EP11159070.9

申请日：2011-03-21

Applicant: Research In Motion Limited

Inventor： Manku, Tajinder

IPC: H04B1/04 ,  H04B1/52

CPC classification number: H04B1/0475 ,  H03F1/3241 ,  H04B1/525 ,  H04B2001/0425

Abstract: An electronic device (10) includes a transmitter (12) with a baseband input (13) for a baseband signal, a mixer (18a, 18b) downstream from the baseband input, and a phase-locked loop (PLL) (52) having a voltage controlled oscillator (VCO) (54) and a phase detector (58) coupled thereto, the VCO coupled to the mixer. A power amplifier (24) is downstream from the mixer, and generates at least one aggressing signal that would otherwise generate an output pull of the VCO, causing transmit distortion on a transmit signal. A receiver (27) is coupled to the power amplifier and has a sense input configured to receive the transmit signal. A VCO pulling compensation circuit (25) is coupled to the baseband input and is configured to compensate the at least one baseband signal for the transmit distortion based upon the sensed transmit signal.

Abstract translation: 发射机到电子设备（10）包括（12）具有用于基带信号的基带输入端（13），混频器（18A，18B）的下游从基带输入，和一个锁相环（PLL）（52），其具有 一个电压控制振荡器（VCO）（54）和一个相位检测器（58）与其耦合，耦合到所述混频器的VCO。 功率放大器（24）的下游的混合器，和基因速率至少一个侵华信号做否则将产生在VCO的输出上拉，导致上的发射信号发送失真。 一种接收机（27）被耦合到所述功率放大器，并具有被配置为接收所述发射信号感测输入。 甲VCO牵引补偿电路（25）耦合到所述基带输入，并且被配置为补偿基于所感测发射信号的发射失真的所述至少一个基带信号。