-
公开(公告)号:JPH10233649A
公开(公告)日:1998-09-02
申请号:JP4618198
申请日:1998-02-12
Applicant: MOTOROLA INC
Inventor: CALLICOTTE MARK J , GROSSPIETSCH JOHN K
Abstract: PROBLEM TO BE SOLVED: To provide the transconductance filter in which a stable operation is continued while a die area is reduced and power consumption is decreased. SOLUTION: The transconductance filter 200 is made up of multi-stage conductors 110, 120, 130 each having inputs and an output and switches 260, 265, 270 coupled between each output and a voltage source. Each switch responds to a control signal 275 in terms of the operation to directly connect the voltage source and the output of each transconductor or disconnect them before a point of time when at least the filter filters an input voltage signal. The voltage of the voltage source is within a prescribed input voltage range of the transconductor that is specified by a range of the transconductance of the transconductor being nearly constant and positive.
-
公开(公告)号:JPH10327101A
公开(公告)日:1998-12-08
申请号:JP5293898
申请日:1998-02-18
Applicant: MOTOROLA INC
Inventor: CALLICOTTE MARK J , STORM BRIAN D
Abstract: PROBLEM TO BE SOLVED: To provide a method for low power for maintaining exact time at a mobile station while controlling the in/out of slotted paging mode by calculating time to wake up and the other intermediate time corresponding to a wake-up event before turning into a low power sleep state. SOLUTION: Based on the control of a call processor, a sleep time controller 200 turns a radio telephone into a low power sleep mode for a period based on the timing accuracy of a sleep clock generator 205. The call processor calculates the enable oscillator time, the warm-up time for restarting one part of RF part and the prewake time for restaring the reference timer of the modem. In the sleep mode, the sleep time controller 200 simulates system timing for getting out of the sleep mode to the end of sleep period determined by the call processor.
-
公开(公告)号:JPH10256984A
公开(公告)日:1998-09-25
申请号:JP6779098
申请日:1998-03-02
Applicant: MOTOROLA INC
Inventor: STORM BRIAN D , CALLICOTTE MARK J , CAHILL STEPHEN V
Abstract: PROBLEM TO BE SOLVED: To control entrance to/exit from a slotted paging mode in a mobile station like a radio telephone. SOLUTION: A radio telephone 104 in a radio telephone system 100 enters into a low power sleep mode and uses a sleep clock generator having a low resolution to measure the duration of the sleep mode. The radio telephone 104 uses an oscillator 116 having a high resolution to synchronize the timing of the radio telephone 104 with the system timing. The radio telephone 104 gets out of the low power sleep mode synchronously with the system timing.
-
公开(公告)号:DE19808487C2
公开(公告)日:2002-05-29
申请号:DE19808487
申请日:1998-02-27
Applicant: MOTOROLA INC
Inventor: STORM BRIAN D , CALLICOTTE MARK J , CAHILL STEPHEN V
IPC: H04B1/16 , H04B7/26 , H04M19/08 , H04W52/02 , H04Q7/20 , H04Q7/32 , H03G3/30 , H04B1/38 , H04B7/216
Abstract: A radiotelephone (104) in a radiotelephone system (100) enters a low power sleep mode and times the duration of the sleep mode using a sleep clock generator (205) having a coarse resolution. The radiotelephone synchronizes timing of the radiotelephone to system timing using an oscillator (116) having a fine resolution. The radiotelephone then exits the low power sleep mode synchronized with system timing.
-
公开(公告)号:GB2322246B
公开(公告)日:2001-09-12
申请号:GB9801266
申请日:1998-01-21
Applicant: MOTOROLA INC
Inventor: CALLICOTTE MARK J , GROSSPIETSCH JOHN K
Abstract: A transconductance filter (200) comprises multiple stages of a transconductor (110,120,130) having an input and an output, and a switch (260,265,270) coupled between the output and the voltage source. The switch is operatively responsive to the control signal for coupling and decoupling the voltage source directly to the output of the transconductor at least prior to the time the filter is required to filter the input voltage signal. The voltage source is within a predetermined input voltage range of the transconductor defined by a region in which a transconductance of the transconductor is substantially constant and positive.
-
公开(公告)号:CA2152497A1
公开(公告)日:1995-05-18
申请号:CA2152497
申请日:1994-10-17
Applicant: MOTOROLA INC
Inventor: CONNELL LAWRENCE E , CALLICOTTE MARK J , ROECKNER WILLIAM J
-
公开(公告)号:AR050538A2
公开(公告)日:2006-11-01
申请号:ARP050103601
申请日:2005-08-29
Applicant: MOTOROLA INC
Inventor: STORM BRIAN D , CALLICOTTE MARK J , CAHILL STEPHEN V
Abstract: Un método para operar una estacion movil en un sistema de radioteléfonos de acceso multiple por division de codigos (CDMA) que incluye una pluralidad de estaciones de base que transmiten una secuencia de ruido pseudoaleatorio (PN) corta que incluye un indicador de sincronizacion del sistema que comprende un límite de retorno de PN de la secuencia de PN corta, el método comprende los pasos de: (a) determinar un balance entre un reloj de resolucion fina y un reloj de resolucion gruesa; (b) ingresar en un modo de inactividad de baja potencia; (c) sincronizar una duracion de la inactividad usando el reloj de resolucion gruesa; (d) sincronizar el reloj de resolucion fina de la estacion movil con el límite de retorno de PN de la secuencia de PN corta correlacionando una secuencia de PN corta generada en la estacion movil; determinar un equilibrio entre la senal del reloj de referencia y la senal de reloj inactivo basado en la precision de sincronizacion; ajustar la sincronizacion de la senal de reloj inactivo combinando la precision de sincronizacion de la senal de reloj inactivo y el equilibrio; e ingresar en un modo de inactividad de baja potencia durante una duracion de tiempo que está basada en la senal de reloj inactivo ajustada.
-
8.
公开(公告)号:HU221388B1
公开(公告)日:2002-09-28
申请号:HU9800230
申请日:1998-02-04
Applicant: MOTOROLA INC
Inventor: CAHILL STEPHAN V , CALLICOTTE MARK J , STORM BRIAN D
Abstract: A radiotelephone (104) in a radiotelephone system (100) enters a low power sleep mode and times the duration of the sleep mode using a sleep clock generator (205) having a coarse resolution. The radiotelephone synchronizes timing of the radiotelephone to system timing using an oscillator (116) having a fine resolution. The radiotelephone then exits the low power sleep mode synchronized with system timing.
-
公开(公告)号:ZA9801446B
公开(公告)日:1998-08-24
申请号:ZA9801446
申请日:1998-02-20
Applicant: MOTOROLA INC
Inventor: STORM BRIAN D , CAHILL STEPHEN V , CALLICOTTE MARK J
CPC classification number: H04M19/08 , H04W52/0274 , Y02D70/1222 , Y02D70/24
Abstract: A radiotelephone (104) in a radiotelephone system (100) enters a low power sleep mode and times the duration of the sleep mode using a sleep clock generator (205) having a coarse resolution. The radiotelephone synchronizes timing of the radiotelephone to system timing using an oscillator (116) having a fine resolution. The radiotelephone then exits the low power sleep mode synchronized with system timing.
-
公开(公告)号:CA2151943A1
公开(公告)日:1995-05-18
申请号:CA2151943
申请日:1994-10-17
Applicant: MOTOROLA INC
Inventor: CONNELL LAWRENCE E , CALLICOTTE MARK J , HADDAD KENNETH R
-
-
-
-
-
-
-
-
-