公开(公告)号：US20170155398A1

公开(公告)日：2017-06-01

申请号：US14954577

申请日：2015-11-30

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Sriram NARAYANAN ,  Srinath RAMASWAMY ,  Arup POLLEY ,  Ajit SHARMA

IPC: H03M1/06 ,  H03M1/00

CPC classification number: H03M1/0609 ,  H03M1/001 ,  H03M1/002 ,  H03M1/1295 ,  H03M1/162

Abstract: An analog to digital converter (ADC) system that includes a first amplifier configured to amplify an analog input signal to produce an amplified direct current (DC) signal, an ADC configured to receive the amplified DC signal and convert the amplified DC signal into a digital DC signal, a digital to analog converter configured to receive the digital DC signal and convert the digital DC signal into an analog DC signal, and a second amplifier configured to receive an analog alternating current (AC) signal comprising the analog DC signal subtracted from the analog input signal and amplify the analog AC signal to produce an amplified AC signal. The ADC is further configured to receive the amplified AC signal and produce a digital AC signal. The second amplifier has a gain greater than a gain of the first amplifier.

公开(公告)号：US20150002324A1

公开(公告)日：2015-01-01

申请号：US14321434

申请日：2014-07-01

Applicant: Texas Instruments Incorporated

Inventor： Ajit SHARMA ,  Sriram NARAYANAN ,  Srinath M. RAMASWAMY

IPC: H03M1/12

CPC classification number: H03M1/124 ,  H03M1/002 ,  H03M1/1255 ,  H03M1/126

Abstract: A mixed signal device includes an analog circuit and a digital circuit coupled to the analog circuit. The digital circuit includes a component that samples a signal at a sampling rate that is dynamically variable by the digital circuit based on the bandwidth of the incoming signal. The digital circuit is to automatically assert a signal to the analog circuit to change a bias current of the analog circuit based on a change to the sampling rate in the digital circuit.

Abstract translation: 混合信号装置包括模拟电路和耦合到模拟电路的数字电路。 数字电路包括以基于输入信号的带宽由数字电路动态变化的采样率对信号进行采样的部件。 数字电路是根据数字电路中采样率的变化，自动向模拟电路断言信号以改变模拟电路的偏置电流。