公开(公告)号：EP1790988A1

公开(公告)日：2007-05-30

申请号：EP05425842.1

申请日：2005-11-29

Applicant: STMicroelectronics S.r.l.

Inventor： Ungaretti, Tommaso ,  Lasalandra, Ernesto

IPC: G01P15/125

CPC classification number: G01P15/125 ,  G01P15/131

Abstract: A detection circuit (42) is provided with a differential capacitive sensor (1) and with an interface circuit (30) having a first sense input (7a) and a second sense input (7b), electrically connected to the differential capacitive sensor (1). Provided in the interface circuit are: a sense amplifier (12) connected at input to the first sense input and to the second sense input (7a, 7b) and supplying an output signal (V o ) related to a capacitive unbalancing (ΔC s ) of the differential capacitive sensor (1); and a common-mode control circuit (32), connected to the first sense input (7a) and to the second sense input (7b) and configured to control a common-mode electrical quantity present on the first sense input (7a) and on the second sense input (7b). The common-mode control circuit (32) is of a totally passive type and is provided with a capacitive circuit (34, 35), which is substantially identical to an equivalent electrical circuit of the differential capacitive sensor (1) and is driven with a driving signal V r ‾ in phase opposition with respect to a read signal (V r ) supplied to the differential capacitive sensor.

公开(公告)号：EP1437639A3

公开(公告)日：2006-09-13

申请号：EP04250026.4

申请日：2004-01-06

Applicant: STMicroelectronics, Inc.

Inventor： Pedrazzini, Giorgio ,  Lasalandra, Ernesto ,  Vigna, Bendetto

IPC: G06F1/32

CPC classification number: G06F1/3203

Abstract: An electronic device includes a motion sensitive power switching integrated circuit, which, in turn, includes a power switch connected between an input and an output, and a MEMS inertial sensing switch movable from a first position to a second position based upon motion thereof. The motion sensitive power switching integrated circuit also includes a detector operating the power switch to supply power to the output from the input based upon the MEMS inertial sensing switch moving from the first position to the second position.
The first and second positions may be, respectively, a normally open position and a closed position. The device may be unpowered until the MEMS inertial sensing switch moves from the open to the closed position. The detector may generate a power on reset (POR) signal based upon the MEMS inertial sensing switch moving from the open to the closed position.

公开(公告)号：EP1437639A2

公开(公告)日：2004-07-14

申请号：EP04250026.4

申请日：2004-01-06

Applicant: STMicroelectronics, Inc.

Inventor： Pedrazzini, Giorgio ,  Lasalandra, Ernesto ,  Vigna, Bendetto

IPC: G06F1/32

CPC classification number: G06F1/3203

Abstract: An electronic device includes a motion sensitive power switching integrated circuit, which, in turn, includes a power switch connected between an input and an output, and a MEMS inertial sensing switch movable from a first position to a second position based upon motion thereof. The motion sensitive power switching integrated circuit also includes a detector operating the power switch to supply power to the output from the input based upon the MEMS inertial sensing switch moving from the first position to the second position.
The first and second positions may be, respectively, a normally open position and a closed position. The device may be unpowered until the MEMS inertial sensing switch moves from the open to the closed position. The detector may generate a power on reset (POR) signal based upon the MEMS inertial sensing switch moving from the open to the closed position.

Abstract translation: 该电路（22）具有输入（24）连接到连接到负载电路（30），以由所述电源供电的电源（26）和在输出端（28）。 微机电（MEM）的惯性传感开关（32A-32C）是从打开位置到闭合位置可动。 检测器（34）操作的电源开关，以将电力提供给基于所述开关的运动的输出。 因此独立claimsoft被包括用于在电源开关的输出连接到与基于运动选择性地供电电路的方法。