公开(公告)号：IT8149873D0

公开(公告)日：1981-12-09

申请号：IT4987381

申请日：1981-12-09

Applicant: MOTOROLA INC

Inventor： WRATHALL ROBERT S

IPC: G01R19/165 ,  G05F1/56 ,  G05F1/573 ,  H03K5/08 ,  H03K17/042 ,  H03K17/082 ,  H02J

Abstract: A solid state current sensing circuit which is useful in a power supply has bipolar as well as CMOS transistors. The bipolar transistors serve as output transistors and have lateral collectors as well as substrate collectors. The lateral collectors of the bipolar transistors are used to sense a portion of the current carried by the substrate collectors. The lateral collectors are connected to a current mirror which provides an output indication of when the output current exceeds a predetermined amount. The entire circuit can be integrated on a single chip.

公开(公告)号：CA1142574A

公开(公告)日：1983-03-08

申请号：CA353278

申请日：1980-06-03

Applicant: MOTOROLA INC

Inventor： WRATHALL ROBERT S

IPC: F02P3/04 ,  F02P3/045 ,  F02P5/04 ,  F02P5/15

Abstract: A digital spark and dwell ignition control system is disclosed. Maximum advance and reference sensors are utilized to determine positions of maximum and minimum possible advance for spark ignition with respect to the position of the engine crankshaft. For each maximum advance sensor pulse a main counter starts sequentially counting clock pulses wherein the maximum count obtained by the counter is related to engine crankshaft speed. The count of the main counter is utilized by a dwell circuit to determine the time prior to the maximum advance pulse at which spark coil excitation should occur. The main counter count also determines several inputs to a read only memory (ROM) circuit whose output controls a rate multiplier. The rate multiplier receives input clock signals and provides selective frequency division for these clock signals in accordance with the ROM output. The output of the rate multiplier is coupled to an accumulator means, preferably a series of counters, which provides an accumulated count corresponding to the rate multiplier output. The accumulated count is utilized to determine the occurrence of spark ignition. Pulse width modulation circuitry receives an analog signal related to the amount of sensed engine vacuum pressure and produces a corresponding periodic digital two state signal which has a duty cycle related to the magnitude of the analog vacuum signal. The periodic two state digital signal is coupled as an input to the ROM which controls the rate multiplier means. In this manner the accumulator count is -?-made to depend upon the magnitude of the analog vacuum signal while a minimum amount of ROM storage space is utilized.

公开(公告)号：IT1144523B

公开(公告)日：1986-10-29

申请号：IT4987381

申请日：1981-12-09

Applicant: MOTOROLA INC

Inventor： WRATHALL ROBERT S

IPC: G01R19/165 ,  G05F1/56 ,  G05F1/573 ,  H03K5/08 ,  H03K17/042 ,  H03K17/082 ,  H02J

Abstract: A solid state current sensing circuit which is useful in a power supply has bipolar as well as CMOS transistors. The bipolar transistors serve as output transistors and have lateral collectors as well as substrate collectors. The lateral collectors of the bipolar transistors are used to sense a portion of the current carried by the substrate collectors. The lateral collectors are connected to a current mirror which provides an output indication of when the output current exceeds a predetermined amount. The entire circuit can be integrated on a single chip.

公开(公告)号：WO1982002262A1

公开(公告)日：1982-07-08

申请号：PCT/US1981001601

申请日：1981-11-27

Applicant: MOTOROLA INC

Inventor： MOTOROLA INC ,  WRATHALL ROBERT S

IPC: G05F01/46

CPC classification number: H03K17/04213 ,  G01R19/16519 ,  G05F1/573 ,  H03K17/0826

Abstract: Circuit de detection de courant a semi-conducteur utile dans une alimentation en courant, possedant des transistors bipolaires et des transistors CMOS. Les transistors bipolaires (11, 12) servent de transistors de sortie et possedent des collecteurs lateraux (17, 19) ainsi que des substrats collecteurs (16, 18). Les collecteurs lateraux (17, 19) des transistors bipolaires (11, 12) sont utilises pour detecter une partie du courant transporte par les substrat collecteurs (16, 18). Les collecteurs lateraux sont connectes a un miroir de courant (21, 22) fournissant un signal de sortie indiquant le moment ou le courant de sortie depasse une valeur predeterminee. Tout le circuit peut etre integre sur une seule micro-plaquette.

公开(公告)号：EP0067844A4

公开(公告)日：1984-06-05

申请号：EP82900294

申请日：1981-11-27

Applicant: MOTOROLA INC

Inventor： WRATHALL ROBERT S

IPC: G01R19/165 ,  G05F1/56 ,  G05F1/573 ,  H03K5/08 ,  H03K17/042 ,  H03K17/082 ,  G05F1/46

CPC classification number: H03K17/04213 ,  G01R19/16519 ,  G05F1/573 ,  H03K17/0826