公开(公告)号：GB2330023A

公开(公告)日：1999-04-07

申请号：GB9721051

申请日：1997-10-03

Applicant: MOTOROLA INC

Inventor： LEHNING HEINZ ,  GAY MICHAEL JOHN

IPC: H03D1/22 ,  H04L27/233 ,  H04L27/227

Abstract: A synchronous demodulator 10 receives an RE signal 11 and demodulates the signal into in phase and quadrature baseband data. The in phase and quadrature baseband data are used to adjust the phase of subcarriers 58,59 to ensure that the subcarriers and the received signal have the same phase. The phase of the in phase subcarrier reference is inverted when the in phase baseband data signal is not in phase with the quadrature baseband data signal. Similarly, the phase of the quadrature subcarrier reference is inverted when the quadrature baseband data signal is not in phase with the quadrature baseband data signal. The demodulator may be used to demodulate modulated signals from a smart card.

公开(公告)号：HK1003686A1

公开(公告)日：1998-11-06

申请号：HK98102810

申请日：1998-04-02

Applicant: MOTOROLA INC

Inventor： HUYNH-LUONG THIEN ,  LEHNING HEINZ

IPC: H02M3/07 ,  H03K17/0422 ,  H03K17/615 ,  H02M

公开(公告)号：DE69309518D1

公开(公告)日：1997-05-15

申请号：DE69309518

申请日：1993-01-11

Applicant: MOTOROLA INC

Inventor： LEHNING HEINZ

IPC: H04L29/08 ,  G01R19/165 ,  H03K5/19 ,  H03K5/153 ,  H03K3/023

公开(公告)号：DE3676561D1

公开(公告)日：1991-02-07

申请号：DE3676561

申请日：1986-05-02

Applicant: MOTOROLA INC

Inventor： LEHNING HEINZ

IPC: H03F3/42

Abstract: An integrated high voltage amplifier output stage capable of being manufactured using low voltage processes comprises a plurality of low-voltage amplifying means (8-21), such as a chain of Darlington transistor pairs, connected between a relatively high voltage source (36) and a current source (34) to provide a common output (35). A potential divider network (1-7) is connected between the high voltage source (36) and a protective high voltage FET (30) for providing low voltage inputs to each of the amplifying means. The input signal to the potential divider network (1-7) is then provided from a cascode stage made up of a low voltage transistor (29) and the high voltage FET (30), all the components being produced by a low voltage process.

公开(公告)号：GB2138495B

公开(公告)日：1987-02-18

申请号：GB8308405

申请日：1983-03-26

Applicant: MOTOROLA INC

Inventor： LEHNING HEINZ

IPC: F02P3/045 ,  F02P3/055 ,  F02P3/04

公开(公告)号：GB2174857A

公开(公告)日：1986-11-12

申请号：GB8511865

申请日：1985-05-10

Applicant: MOTOROLA INC

Inventor： LEHNING HEINZ

IPC: H03F3/42 ,  H03F3/04 ,  H03F3/16

Abstract: An integrated high voltage amplifier output stage capable of being manufactured using low voltage processes comprises a plurality of low-voltage amplifying means (8-21), such as a chain of Darlington transistor pairs, connected between a relatively high voltage source (36) and a current source (34) to provide a common output (35). A potential divider network (1-7) is connected between the high voltage source (36) and a protective high voltage FET (30) for providing low voltage inputs to each of the amplifying means. The input signal to the potential divider network (1-7) is then provided from a cascode stage made up of a low voltage transistor (29) and the high voltage FET (30), all the components being produced by a low voltage process.

公开(公告)号：GB2138495A

公开(公告)日：1984-10-24

申请号：GB8308405

申请日：1983-03-26

Applicant: MOTOROLA INC

Inventor： LEHNING HEINZ

IPC: F02P3/045 ,  F02P3/055 ,  F02P3/04

Abstract: A periodic signal provided by a magnetic sensor 3 is compared with two reference potentials by means of two comparators 13 and 15. An output signal provided by one comparator 13 is used to enable the supply of current to an ignition coil 39 whilst an output signal provided by the second comparator 15 is used to switch off the current in the ignition coil. In this way the switching on and off of the flow of current through the ignition coil are made independent of one another enabling more accurate ignition timing to be obtained at all engine speeds. The coil current is regulated by a circuit including an operational amplifier 58 and the reference potential supplied to the comparator 13 is increased as the speed of the engine decreases so that the time period for which the coil current is at its maximum value is a constant proportion of the period of the sensor waveform despite changes in engine speed. To prevent malfunction of the system at low engine speeds and low supply voltage, a switch 69 controlled by a speed detector 70 and a voltage detector 75 are provided to step down the waveform Vsc supplied to the comparator 13. An over voltage protection circuit 84-90 is provided for Darlington transistors 28, 29.