公开(公告)号：WO2011063873A1

公开(公告)日：2011-06-03

申请号：PCT/EP2010/005928

申请日：2010-09-29

Applicant: STMICROELECTRONICS S.R.L. ,  ALBERTINI, Matteo ,  RONCHI, Daniele ,  ROSSI, Sandro ,  RICOTTI, Giulio

Inventor： ALBERTINI, Matteo ,  RONCHI, Daniele ,  ROSSI, Sandro ,  RICOTTI, Giulio

IPC: H03F3/45 ,  H03G1/00

CPC classification number: H03F3/45183 ,  H03F3/45098 ,  H03F2200/294 ,  H03F2200/453 ,  H03F2203/45492 ,  H03F2203/45674

Abstract: The invention relates to a driving method for obtaining a linear gain variation of a transconductance amplifier, of the type comprising at least one differential transistor cell, with adjustment of a driving voltage value (Vtgc1) of a degenerative driving transistor (MD1) of said transconductance amplifier, comprising the steps of : generating an output current signal of a differential cell (11) being a copy of said differential transistor cell of said transconductance amplifier, said output current signal having a linear relationship with a transconductance value of said copy differential cell (11) as said driving voltage (Vtgc1) varies; generating a reference current signal having a linear relationship with a differential input voltage; comparing said output current signal and said reference current signal for adjusting said driving voltage value (Vtgc1) and modifying said transconductance value of said copy differential cell (11) up to a balance of said current signals.

Abstract translation: 本发明涉及一种用于获得包括至少一个差分晶体管单元的类型的跨导放大器的线性增益变化的驱动方法，其中调节所述跨导的退化驱动晶体管（MD1）的驱动电压值（Vtgc1） 放大器，包括以下步骤：产生作为所述跨导放大器的所述差分晶体管单元的副本的差分单元（11）的输出电流信号，所述输出电流信号与所述复制差分单元的跨导值具有线性关系（ 11），因为所述驱动电压（Vtgc1）变化; 产生与差分输入电压具有线性关系的参考电流信号; 比较所述输出电流信号和所述参考电流信号，用于调节所述驱动电压值（Vtgc1），并修改所述复制差分单元（11）的所述跨导值直到所述电流信号的平衡。

公开(公告)号：EP3336581A1

公开(公告)日：2018-06-20

申请号：EP17175103.5

申请日：2017-06-08

Applicant: STMicroelectronics S.r.l.

Inventor： CORONA, Stefano ,  ALBERTINI, Matteo ,  D'ANGELO, Francesco

IPC: G01S15/10 ,  G01S7/523

CPC classification number: G01S7/524 ,  G01S7/523 ,  G01S7/527 ,  G01S15/102 ,  G01S15/108 ,  G01S15/93

Abstract: A method of detecting objects, e.g. by means of piezoelectric transducers, includes transmitting acoustic signals (TW) including sets of pulses towards an object (0) to induce echo signals (EW) resulting from reflection of the acoustic signals at the object, wherein the time delay of the echo signals is indicative of the distance (D) to the object. The method includes transmitting a first acoustic signal including a first set of pulses including a first number of pulses, and checking if a first echo signal resulting from reflection of the first acoustic signal is received with an intensity reaching an echo detection threshold. If the intensity of the first echo signal reaches the echo detection threshold, the distance to the object is calculated as a function of the time delay of the first echo signal. If the intensity of the first echo signal fails to reach the echo detection threshold, one or more further acoustic signals are transmitted including a set of pulses wherein the number of pulses is increased with respect to the number of pulses in said first acoustic signal.