公开(公告)号：WO2011041612A1

公开(公告)日：2011-04-07

申请号：PCT/US2010/051007

申请日：2010-09-30

Applicant: QUALCOMM INCORPORATED ,  SEO, Dongwon ,  SARIPALLI, Ganesh ,  SONG, Tongyu ,  TALEIE, Shahin, Mehdizad ,  KONG, Derui

Inventor： SEO, Dongwon ,  SARIPALLI, Ganesh ,  SONG, Tongyu ,  TALEIE, Shahin, Mehdizad ,  KONG, Derui

IPC: H03M1/74

CPC classification number: H03M1/742 ,  H03F1/223 ,  H03F1/3241 ,  H03F3/195 ,  H03F3/245 ,  H03F3/45183

Abstract: A circuit for digital-to-analog conversion is described. The circuit includes a digital-to-analog converter (DAC). The DAC includes a double cascaded current source and a differential current-mode switch (DCMS). The circuit further includes a direct current (DC) offset stage. The circuit also includes a load attenuator. The double cascaded current source may be between the DCMS and a rail voltage.

Abstract translation: 描述用于数模转换的电路。 该电路包括一个数模转换器（DAC）。 DAC包括双级联电流源和差分电流模式开关（DCMS）。 电路还包括直流（DC）偏置级。 该电路还包括负载衰减器。 双级联电流源可以在DCMS和导轨电压之间。

公开(公告)号：WO2016137768A1

公开(公告)日：2016-09-01

申请号：PCT/US2016/017815

申请日：2016-02-12

Applicant: QUALCOMM INCORPORATED

Inventor： SEO, Dongwon ,  YOU, Yang ,  JI, Honghao ,  SONG, Tongyu ,  SARIPALLI, Ganesh ,  MEHDIZAD TALEIE, Shahin

IPC: G05F1/56 ,  G05F1/575

CPC classification number: H03M1/0604 ,  G05F1/56 ,  G05F1/575 ,  G05F3/18 ,  H02M3/156 ,  H03F3/24 ,  H03M1/00 ,  H03M1/70 ,  H03M1/747 ,  H04B1/0475 ,  H04B2001/0408

Abstract: A method and apparatus for attenuating transmit digital to analog converter (DAC) spurs is provided. The method begins when a reference voltage is injected into an amplifier. Next, an output of the ground low drop-out regulator is measured and is them compared with the reference voltage. The output of the amplifier is then adjusted based on the results of the comparison. If the reference voltage is higher then the output of the ground low drop-out regulator the output of the amplifier is adjusted to ground. If the reference voltage is lower than the output of the ground low drop-out regulator then the output of the amplifier is adjusted to match the reference voltage.

Abstract translation: 提供了用于衰减发射数模转换器（DAC）杂散的方法和装置。 当将参考电压注入放大器时，该方法开始。 接下来，测量接地低压降稳压器的输出，并将其与参考电压进行比较。 然后根据比较结果调整放大器的输出。 如果参考电压较高，则接地低压降稳压器的输出将放大器的输出调整到地。 如果参考电压低于接地低压降稳压器的输出，则调节放大器的输出以匹配参考电压。