公开(公告)号：JPH10154992A

公开(公告)日：1998-06-09

申请号：JP28791697

申请日：1997-10-03

Applicant: MOTOROLA INC

Inventor： DAVIS BENJAMIN R ,  PIGOTT JOHN M ,  ANDERSON KEVIN S ,  POWERS CHARLES R

IPC: B60R21/16 ,  B60R16/02 ,  B60R16/03 ,  B60R21/01 ,  H04L12/40 ,  B60R21/32

Abstract: PROBLEM TO BE SOLVED: To simplify the configuration and to increase the reliability, the energy efficiency and the cost efficiency in the signal transmission method used for an air-bag system. SOLUTION: A control module 11 supplies electric energy to remote modules 20A-20N through two wires and makes communication with them. The supplied electric energy operates partially the remote modules 20A-20N and is stored partially in the remote modules 20A-20N. The control module 11 sends a command signal to the remote modules 20A-20N by using a voltage shift between a high voltage level and an intermediate voltage level. The remote modules 20A-20N send a signal to the control module 11 by a current shift. On the detection of a fault state, the voltage between the two wires is decreased to a low level and the usual operation is interrupted. The control module 11 then sends an ignition signal by a voltage shift between an intermediate voltage level and a low voltage level. The remote modules 20A-20N decode the ignition signal to expand a skive to inflate an air-bag.

公开(公告)号：JP2000201162A

公开(公告)日：2000-07-18

申请号：JP22846899

申请日：1999-08-12

Applicant: MOTOROLA INC

Inventor： SCHULMEYER PETER HANS ,  KRUECKEN JOACHIM ,  PIGOTT JOHN M

IPC: G06F13/14 ,  B60R21/01 ,  B60R21/16 ,  G05B19/042 ,  G06F15/177 ,  H04L12/403 ,  H04L12/40

Abstract: PROBLEM TO BE SOLVED: To allocate a unique address to every general-purpose node in a distributed control system including plural general-purpose nodes by checking the distance set between a controller and every node that shows the relative positions of nodes in a topology that is previously decided and allocating a specific address to a node, based on the relative positions of nodes. SOLUTION: A tree-shaped communication bus structure 55 or 57 includes an ECU 52 of nodes 54 and an air bag electric system 50. The ECU 52 includes an ECU communication device and a current/voltage source device 58 which are connected to a communication bus 55. Then this system is assembled for the first time, a unique tag is not added to every general-purpose node 54 in the system. When the system is started, the device 58 is used and the distances are identified among the nodes 54 based on the communication bus mutual connection 55 or 57. Then the ECU communication device gives a unique address to every node 54 on the bus 55.

公开(公告)号：DE69223189T2

公开(公告)日：1998-04-02

申请号：DE69223189

申请日：1992-08-12

Applicant: MOTOROLA INC

Inventor： PIGOTT JOHN M ,  JARRET ROBERT B ,  NGUYEN XUAN QUANG

IPC: H01L27/02 ,  H02M7/5387 ,  H02P7/00

Abstract: A circuit for discharging an inductive load of an H-bridge circuit at a controlled rate has been provided. When a first half of the H-bridge circuit is switched from a conductive state to a non-conductive state, the circuit clamps a first side of the inductive load, while creating a recirculation path to discharge the inductive load at a controlled rate. A similar circuit may be utilized when a second (complementary) half of the H-bridge circuit is switched from a conductive state to a non-conductive state wherein the similar circuit clamps a second side of the inductive load, while creating a recirculation path to discharge the inductive load at a controlled rate.

公开(公告)号：DE69223189D1

公开(公告)日：1998-01-02

申请号：DE69223189

申请日：1992-08-12

Applicant: MOTOROLA INC

Inventor： PIGOTT JOHN M ,  JARRET ROBERT B ,  NGUYEN XUAN QUANG

IPC: H01L27/02 ,  H02M7/5387 ,  H02P7/00

Abstract: A circuit for discharging an inductive load of an H-bridge circuit at a controlled rate has been provided. When a first half of the H-bridge circuit is switched from a conductive state to a non-conductive state, the circuit clamps a first side of the inductive load, while creating a recirculation path to discharge the inductive load at a controlled rate. A similar circuit may be utilized when a second (complementary) half of the H-bridge circuit is switched from a conductive state to a non-conductive state wherein the similar circuit clamps a second side of the inductive load, while creating a recirculation path to discharge the inductive load at a controlled rate.

公开(公告)号：DE69130055D1

公开(公告)日：1998-10-01

申请号：DE69130055

申请日：1991-12-16

Applicant: MOTOROLA INC

Inventor： PIGOTT JOHN M ,  WOLLSCHLAGER RANDAALL T

IPC: H01L29/866 ,  H01L29/861

Abstract: A device including a first semiconductor PN junction (16) which is reverse biased to operate in the avalanche breakdown region. A second semiconductor PN junction (20) is biased to operate in the forward active region such that carriers are injected through the second semiconductor PN junction and diffuse to the first semiconductor PN junction wherein the noise generated from the first semiconductor PN junction operating in the avalanche breakdown region is substantially reduced.

公开(公告)号：DE69019244T2

公开(公告)日：1995-11-30

申请号：DE69019244

申请日：1990-07-04

Applicant: MOTOROLA INC

Inventor： PIGOTT JOHN M

IPC: H01L23/58 ,  G05F3/20 ,  G11C16/30 ,  H02M3/07

Abstract: A charge pump includes a feedback circuit (12, 14, 16) coupled between the input and output of a driving buffer (22) the latter of which sinks and sources current through a pump capacitor (24) during respective charge and discharge phases. First (30) and second (32) switching diodes are serially coupled between a source of operating potential (34) and an output terminal (36) to isolate each from the other. The pump capacitor (24) alternately sinks current through the first switching diode (30) during the charge phase and sources current though the second switching diode (32) during the discharge phase. A dynamic voltage is developed at the output of the buffer (22) encompassing first and second predetermined voltage levels corresponding to completion of the charge and discharge phases of the pump capacitor accordingly. The feedback circuit. (12, 14; 16), responsive to the dynamic voltage, complements the drive direction of the buffer circuit (22) to substantially eliminating the timing mismatches between the feedback circuit and the charging rate of the pump capacitor (24).

公开(公告)号：AU2003268372A1

公开(公告)日：2004-03-29

申请号：AU2003268372

申请日：2003-08-22

Applicant: MOTOROLA INC

Inventor： PIGOTT JOHN M

IPC: H03K3/03 ,  H03K3/0231 ,  H03K4/06 ,  H03K4/502

Abstract: An oscillator circuit (40, 60) has a comparator circuit (48, 68) and a monitor and control circuit (50, 80). The comparator (48, 68) provides a periodic output signal. The monitor and control circuit (50, 80) controls the voltage swing of the periodic output voltage in response to monitoring a periodic input voltage. A capacitor (52, 90) is coupled between the output terminal of the monitor and control circuit (50, 80) and input terminal of the comparator (48, 68) and is sized to set the oscillation frequency. The monitor and control circuit (50, 80) functions to limit the input voltage excursions without using an attenuation capacitor (16). Eliminating the attenuation capacitor (16) provides a smaller oscillator circuit having reduced power supply current spikes and which is easier to implement.

公开(公告)号：AU2002357181A1

公开(公告)日：2003-07-15

申请号：AU2002357181

申请日：2002-12-12

Applicant: MOTOROLA INC

Inventor： PIGOTT JOHN M ,  REITER THOMAS JEFFREY

IPC: H02P8/08 ,  G01R7/06

Abstract: Stepped rotary motion is imparted to the rotor of a stepping motor by alternately driving at least first and second coils which interact with a plurality of magnetic poles on the rotor. When each of the coils transitions from a driven to a non-driven state, the continued motion of the rotor causes a back electro-motive force to be generated in the coil. The electro-motive forces produced by the coils are rectified, integrated, and then compared with a threshold to determine if a motor stall condition exists.

公开(公告)号：DE69019244D1

公开(公告)日：1995-06-14

申请号：DE69019244

申请日：1990-07-04

Applicant: MOTOROLA INC

Inventor： PIGOTT JOHN M

IPC: H01L23/58 ,  G05F3/20 ,  G11C16/30 ,  H02M3/07

Abstract: A charge pump includes a feedback circuit (12, 14, 16) coupled between the input and output of a driving buffer (22) the latter of which sinks and sources current through a pump capacitor (24) during respective charge and discharge phases. First (30) and second (32) switching diodes are serially coupled between a source of operating potential (34) and an output terminal (36) to isolate each from the other. The pump capacitor (24) alternately sinks current through the first switching diode (30) during the charge phase and sources current though the second switching diode (32) during the discharge phase. A dynamic voltage is developed at the output of the buffer (22) encompassing first and second predetermined voltage levels corresponding to completion of the charge and discharge phases of the pump capacitor accordingly. The feedback circuit. (12, 14; 16), responsive to the dynamic voltage, complements the drive direction of the buffer circuit (22) to substantially eliminating the timing mismatches between the feedback circuit and the charging rate of the pump capacitor (24).

公开(公告)号：DE69730091T2

公开(公告)日：2005-01-20

申请号：DE69730091

申请日：1997-09-29

Applicant: MOTOROLA INC

Inventor： DAVIS BENJAMIN R ,  PIGOTT JOHN M ,  ANDERSON KEVIN S ,  POWERS CHARLES R

IPC: B60R21/16 ,  B60R16/02 ,  B60R16/03 ,  B60R21/01 ,  G06F13/40 ,  B60R21/00