公开(公告)号：US09258008B2

公开(公告)日：2016-02-09

申请号：US14230370

申请日：2014-03-31

Applicant: STMicroelectronics International N.V.

Inventor： Pratap Narayan Singh ,  Ashish Sharma Kumar ,  Chandrajit Debnath ,  Rakesh Malik

IPC: H03M1/00 ,  H03M1/46 ,  H03M1/12 ,  H03M1/06

CPC classification number: H03M1/125 ,  H03M1/00 ,  H03M1/0612 ,  H03M1/069 ,  H03M1/0695 ,  H03M1/12 ,  H03M1/46 ,  H03M1/462

Abstract: An asynchronous SAR ADC to convert an analog signal into a series of digital pulses in an efficient, low power manner. In synchronous SAR ADC circuits, a separate and cumbersome clock signal is used to trigger the internal circuitry of the SAR ADC. Instead of triggering the components of the SAR DAC synchronously with a clock signal, the asynchronous solution uses its own internal signals to trigger its components in an asynchronous cyclic manner. Further, in order to increase efficiency and guard against circuit failures due to difficulties arising from transient signals, the asynchronous SAR ADC may also include a delay circuit for introducing a variable delay to the SAR ADC cycle.

Abstract translation: 异步SAR ADC，以高效，低功耗的方式将模拟信号转换为一系列数字脉冲。 在同步SAR ADC电路中，单独和繁琐的时钟信号用于触发SAR ADC的内部电路。 异步解决方案不是以时钟信号同步触发SAR DAC的组件，而是以其自身的内部信号以异步循环方式触发其组件。 此外，为了提高效率并防止由于瞬态信号引起的困难而导致的电路故障，异步SAR ADC还可以包括用于将可变延迟引入SAR ADC周期的延迟电路。

公开(公告)号：US20150286238A1

公开(公告)日：2015-10-08

申请号：US14675309

申请日：2015-03-31

Applicant: STMicroelectronics SA ,  STMicroelectronics International N.V.

Inventor： Jean-Pierre Blanc ,  Pratap Narayan Singh

IPC: G05F3/16

CPC classification number: G05F3/16 ,  G05F3/26 ,  G05F3/267 ,  G05F3/30

Abstract: A reference voltage generation circuit, including a first current source in series with a first bipolar transistor; a second current source in series with a first resistor; a third current source in series with a second bipolar transistor, the third current source being assembled as a current mirror with the first current source; a second resistor between the base of the second bipolar transistor and the junction point between the current source and the first resistor; and a fourth current source in series with a third resistor, the junction point between the fourth current source and the third resistor defining a reference voltage terminal.

Abstract translation: 参考电压产生电路，包括与第一双极晶体管串联的第一电流源; 与第一电阻器串联的第二电流源; 与第二双极晶体管串联的第三电流源，所述第三电流源被组装为具有所述第一电流源的电流镜; 第二电阻器，位于第二双极晶体管的基极与电流源与第一电阻之间的连接点之间; 以及与第三电阻器串联的第四电流源，所述第四电流源和所述第三电阻器之间的连接点限定参考电压端子。