公开(公告)号：NO177449C

公开(公告)日：1995-09-13

申请号：NO890648

申请日：1989-02-16

Applicant: MOTOROLA INC

Inventor： MARRY PATRICK J ,  HOUGHTON MICHAEL W ,  WILSON GREGORY P ,  WELLENSTEIN NEIL N

IPC: H04K1/04

Abstract: An analog frequency inversion scrambler employing an exchange of random number seeds between an originating scrambler (103) and an answering scrambler (107) to create two pseudo-random frequency hopping rolling codes has been disclosed. The rolling code used in one direction of a duplex channel is different than the rolling code in the opposite direction and each code is synchronized by periodic synchronization signals.

公开(公告)号：BR9203470A

公开(公告)日：1993-04-13

申请号：BR9203470

申请日：1992-09-04

Applicant: MOTOROLA INC

Inventor： HOUGHTON MICHAEL W ,  MANSSEN KEITH R

IPC: H04K1/04 ,  H04M1/725 ,  H04M11/00 ,  H04B7/26 ,  H04B1/40

Abstract: The wireless telephone of the present invention is comprised of a base unit, coupled to a land-line telephone system, and a remote unit that communicates with the base unit over radio frequencies. The remote unit has scrambling circuits (207 and 216) for encrypting voice signals transmitted to the base unit and decrypting voice signals received from the base unit. The base unit also has scrambling circuits (107 and 116) for encrypting voice signals transmitted to the remote unit and decrypting voice signals received from the remote unit. The wireless telephone uses a keypad (222) for initiating a demonstration mode that allows both parties to the conversation to hear the scrambled audio signal.

公开(公告)号：CA1277712C

公开(公告)日：1990-12-11

申请号：CA564378

申请日：1988-04-18

Applicant: MOTOROLA INC

Inventor： MARRY PATRICK J ,  WILSON GREGORY P ,  HOUGHTON MICHAEL W ,  WELLENSTEIN NEIL N

IPC: H04K1/04 ,  H04L9/00

Abstract: DUPLEX ANALOG SCRAMBLER of the Invention An analog frequency inversion scrambler employing an exchange of random number seeds between an originating scrambler and an answering scrambler to create two pseudo-random frequency hopping rolling codes has been disclosed. The rolling code used in one direction of a duplex channel is different than the rolling code in the opposite direction and each code is synchronized by periodic synchronization signals.

公开(公告)号：CA2074610C

公开(公告)日：1996-07-09

申请号：CA2074610

申请日：1992-07-24

Applicant: MOTOROLA INC

Inventor： HOUGHTON MICHAEL W ,  MANSSEN KEITH RONALD

IPC: H04K1/04 ,  H04M1/725 ,  H04M1/68

Abstract: The wireless telephone of the present invention is comprised of a base unit, coupled to a land-line telephone system, and a remote unit that communicates with the base unit over radio frequencies. The remote unit has scrambling circuits (207 and 216) for encrypting voice signals transmitted to the base unit and decrypting voice signal received from the base unit. The base unit also has scrambling circuits (107 and 116) for encrypting voice signals transmitted to the remote unit and decrypting voice signals received from the remote unit. The wireless telephone uses a keypad (222) for initiating a demonstration mode that allows both parties to the conversation to hear the scrambled audio signal.

公开(公告)号：CA2108493C

公开(公告)日：1995-04-25

申请号：CA2108493

申请日：1993-10-15

Applicant: MOTOROLA INC

Inventor： HESS DAVID M ,  JANSSEN JOHN J ,  HOUGHTON MICHAEL W

IPC: G06F1/08 ,  G06F1/06

Abstract: The bidirectional clocking apparatus provides automatic sensing of whether a reference clock being generated by another circuit needs to be divided down to a lower frequency. If this is true, the clock is divided down to a lower frequency and sent out to other circuits requiring the lower frequency clock. If the lower frequency clock is already generated from another circuit, the apparatus accepts this clock for use by other circuits. Only one terminal is required for either sourcing or accepting this lower frequency clock signal.

公开(公告)号：NO890648L

公开(公告)日：1989-02-16

申请号：NO890648

申请日：1989-02-16

Applicant: MOTOROLA INC

Inventor： MARRY PATRICK J ,  HOUGHTON MICHAEL W ,  WILSON GREGORY P ,  WELLENSTEIN NEIL N

IPC: H04K1/04

Abstract: An analog frequency inversion scrambler employing an exchange of random number seeds between an originating scrambler (103) and an answering scrambler (107) to create two pseudo-random frequency hopping rolling codes has been disclosed. The rolling code used in one direction of a duplex channel is different than the rolling code in the opposite direction and each code is synchronized by periodic synchronization signals.

公开(公告)号：NO890648D0

公开(公告)日：1989-02-16

申请号：NO890648

申请日：1989-02-16

Applicant: MOTOROLA INC

Inventor： MARRY PATRICK J ,  HOUGHTON MICHAEL W ,  WILSON GREGORY P ,  WELLENSTEIN NEIL N

IPC: H04K1/04 ,  H04K

Abstract: An analog frequency inversion scrambler employing an exchange of random number seeds between an originating scrambler (103) and an answering scrambler (107) to create two pseudo-random frequency hopping rolling codes has been disclosed. The rolling code used in one direction of a duplex channel is different than the rolling code in the opposite direction and each code is synchronized by periodic synchronization signals.

公开(公告)号：FI92004B

公开(公告)日：1994-05-31

申请号：FI890417

申请日：1989-01-27

Applicant: MOTOROLA INC

Inventor： MARRY PATRICK J ,  WILSON GREGORY P ,  HOUGHTON MICHAEL W ,  WELLENSTEIN NEIL N

IPC: H04K1/04

Abstract: An analog frequency inversion scrambler employing an exchange of random number seeds between an originating scrambler (103) and an answering scrambler (107) to create two pseudo-random frequency hopping rolling codes has been disclosed. The rolling code used in one direction of a duplex channel is different than the rolling code in the opposite direction and each code is synchronized by periodic synchronization signals.

公开(公告)号：CA2108493A1

公开(公告)日：1994-04-17

申请号：CA2108493

申请日：1993-10-15

Applicant: MOTOROLA INC

Inventor： HESS DAVID M ,  JANSSEN JOHN J ,  HOUGHTON MICHAEL W

IPC: G06F1/08 ,  G06F1/06

Abstract: The bidirectional clocking apparatus provides automatic sensing of whether a reference clock being generated by another circuit needs to be divided down to a lower frequency. If this is true, the clock is divided down to a lower frequency and sent out to other circuits requiring the lower frequency clock. If the lower frequency clock is already generated from another circuit, the apparatus accepts this clock for use by other circuits. Only one terminal is required for either sourcing or accepting this lower frequency clock signal.

公开(公告)号：NO890648A

公开(公告)日：1989-02-16

申请号：NO890648

申请日：1989-02-16

Applicant: MOTOROLA INC

Inventor： MARRY PATRICK J ,  HOUGHTON MICHAEL W ,  WILSON GREGORY P ,  WELLENSTEIN NEIL N

IPC: H04K1/04

CPC classification number: H04K1/04