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公开(公告)号：NO934391D0
公开(公告)日：1993-12-03
申请号：NO934391
申请日：1993-12-03
Applicant: MOTOROLA INC
Inventor： BORRAS JAIME A , GONZALEZ ARMANDO J , CARRALERO CESAR W
Abstract: A communication device (508) for use in a Time Division Multiplex (TDM) communication system (500) includes a transmitter, a receiver, and a frequency scanner for quickly scanning the radio frequency communication channels to determine an available channel. The communication device (508) also includes a phase locked loop (100) for providing a reference signal for the communication device (508) and locking to the available channel. This phase locked loop (100) includes a Voltage Control Oscillator (VCO) (104) having a control signal input (103). The phase locked loop (100) also includes a first filter (110) and a second filter (108). The first filter (110) has a wide frequency response. The second filter (108) includes a storage element (222) and has a narrow frequency response. The phase locked loop (100) also includes a switching circuit (106) which determines which one of the two filters (110, 108) gets coupled to the voltage control oscillator (104).
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公开(公告)号：FI935416A
公开(公告)日：1993-12-03
申请号：FI935416
申请日：1993-12-03
Applicant: MOTOROLA INC
Inventor： BORRAS JAIME A , GONZALEZ ARMANDO J , CARRALERO CESAR W
Abstract: A communication device (508) for use in a Time Division Multiplex (TDM) communication system (500) includes a transmitter, a receiver, and a frequency scanner for quickly scanning the radio frequency communication channels to determine an available channel. The communication device (508) also includes a phase locked loop (100) for providing a reference signal for the communication device (508) and locking to the available channel. This phase locked loop (100) includes a Voltage Control Oscillator (VCO) (104) having a control signal input (103). The phase locked loop (100) also includes a first filter (110) and a second filter (108). The first filter (110) has a wide frequency response. The second filter (108) includes a storage element (222) and has a narrow frequency response. The phase locked loop (100) also includes a switching circuit (106) which determines which one of the two filters (110, 108) gets coupled to the voltage control oscillator (104).
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公开(公告)号：ES2145042T3
公开(公告)日：2000-07-01
申请号：ES93903687
申请日：1993-01-27
Applicant: MOTOROLA INC
Inventor： CARRALERO CESAR W , BORRAS JAIME A , GONZALEZ ARMANDO J
Abstract: Certain operational characteristics of a crystal (104) are measured during a testing and grading process. Once determined, information representing these operational characteristics are stored in memory (120) and utilized by a controller (122) to increment a phase increment register (114) upon determining the crystals ambient temperature via a temperature sensing circuit (124). The value stored in the phase increment register (114) is then sent to a phase accumulator (116) where successive phase increments are summed together. This summed value is in turn sent to a sine lookup table (118) where the instantaneous phase value is converted into sine amplitude. Finally, a digital to analog converter (126) converts the amplitude bit stream into an analog signal for use as a reference oscillator frequency having extremely high frequency resolution. The above mentioned process is repeated every clock cycle until a complete sine wave is produced at which point the phase accumulator is reset to zero and the process begins again.
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公开(公告)号：FI935416A0
公开(公告)日：1993-12-03
申请号：FI935416
申请日：1993-12-03
Applicant: MOTOROLA INC
Inventor： BORRAS JAIME A , GONZALEZ ARMANDO J , CARRALERO CESAR W
Abstract: A communication device (508) for use in a Time Division Multiplex (TDM) communication system (500) includes a transmitter, a receiver, and a frequency scanner for quickly scanning the radio frequency communication channels to determine an available channel. The communication device (508) also includes a phase locked loop (100) for providing a reference signal for the communication device (508) and locking to the available channel. This phase locked loop (100) includes a Voltage Control Oscillator (VCO) (104) having a control signal input (103). The phase locked loop (100) also includes a first filter (110) and a second filter (108). The first filter (110) has a wide frequency response. The second filter (108) includes a storage element (222) and has a narrow frequency response. The phase locked loop (100) also includes a switching circuit (106) which determines which one of the two filters (110, 108) gets coupled to the voltage control oscillator (104).
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公开(公告)号：CA2126872A1
公开(公告)日：1993-08-05
申请号：CA2126872
申请日：1993-01-27
Applicant: MOTOROLA INC
Inventor： CARRALERO CESAR W , BORRAS JAIME A , GONZALEZ ARMANDO J
Abstract: Certain operational characteristics of a crystal (104) are measured during a testing and grading process. Once determined, information representing these operational characteristics are stored in memory (120) and utilized by a controller (122) to increment a phase increment register (114) upon determining the crystals ambient temperature via a temperature sensing circuit (124). The value stored in the phase increment register (114) is then sent to a phase accumulator (116) where successive phase increments are summed together. This summed value is in turn sent to a sine lookup table (118) where the instantaneous phase value is converted into sine amplitude. Finally, a digital to analog converter (126) converts the amplitude bit stream into an analog signal for use as a reference oscillator frequency having extremely high frequency resolution. The above mentioned process is repeated every clock cycle until a complete sine wave is produced at which point the phase accumulator is reset to zero and the process begins again.
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Patent Agency Ranking
公开(公告)号：FR2738425B1
公开(公告)日：1999-02-26
申请号：FR9609146
申请日：1996-07-22
Applicant: MOTOROLA INC
Inventor： MARTIN FREDERICK L , CARRALERO CESAR W
Abstract: A frequency synthesizer (100, 500) provides multiple selectable voltage controlled oscillator (VCO) frequency ranges. A VCO control circuit (114) controls the selectable VCO frequency ranges based on lock conditions of selected VCOs within a VCO array (112) or a single variable VCO circuit (502), to provide an extended tuning range to the frequency synthesizer (100, 500).
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公开(公告)号：FR2738425A1
公开(公告)日：1997-03-07
申请号：FR9609146
申请日：1996-07-22
Applicant: MOTOROLA INC
Inventor： MARTIN FREDERICK L , CARRALERO CESAR W
Abstract: A frequency synthesizer (100, 500) provides multiple selectable voltage controlled oscillator (VCO) frequency ranges. A VCO control circuit (114) controls the selectable VCO frequency ranges based on lock conditions of selected VCOs within a VCO array (112) or a single variable VCO circuit (502), to provide an extended tuning range to the frequency synthesizer (100, 500).
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公开(公告)号：NO934391A
公开(公告)日：1993-12-03
申请号：NO934391
申请日：1993-12-03
Applicant: MOTOROLA INC
Inventor： BORRAS JAIME ANDRES , GONZALEZ ARMANDO J , CARRALERO CESAR W
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公开(公告)号：MY129940A
公开(公告)日：2007-05-31
申请号：MYPI9200981
申请日：1992-06-05
Applicant: MOTOROLA INC
Inventor： BORRAS JAIME A , GONZALEZ ARMANDO J , CARRALERO CESAR W
Abstract: A COMMUNICATION DEVICE (508) FOR USE IN A TIME DIVISION MULTIPLEX (TDM) COMMUNICATION SYSTEM (500) INCLUDES A TRANSMITTER, A RECEIVER, AND A FREQUENCY SCANNER FOR QUICKLY SCANNING THE RADIO FREQUENCY COMMUNICATION CHANNELS TO DETERMINE AN AVAILABLE CHANNEL. THE COMMUNICATION DEVICE (508) ALSO INCLUDES A PHASE LOCKED LOOP (100) FOR PROVIDING A REFERENCE SIGNAL FOR THE COMMUNICATION DEVICE (508) AND LOCKING TO THE AVAILABLE CHANNEL. THIS PHASE LOCKED LOOP (100) INCLUDES A VOLTAGE CONTROL OSCILLATOR (VCO) (104) HAVING A CONTROL SIGNAL INPUT (103). THE PHASE LOCKED LOOP (100) ALSO INCLUDES A FIRST FILTER (110) AND A SECOND FILTER (108). THE FIRST FILTER (110) HAS A WIDE FREQUENCY RESPONSE. THE SECOND FILTER (108) INCLUDES A STORAGE ELEMENT (222) AND HAS A NARROW FREQUENCY RESPONCE. THE PHASE LOCKED LOOP (100) ALSO INCLUDES A SWITCHING CIRCUIT (106) WHICH DETERMINES WHICH ONE OF THE TWO FILTERS (110 108) GETS COUPLED TO THE VOLTAGE CONTROL OSCILLATOR (104).(FIG 1)
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公开(公告)号：BR9206080A
公开(公告)日：1994-08-02
申请号：BR9206080
申请日：1992-06-03
Applicant: MOTOROLA INC
Inventor： BORRAS JAIME A , GONZALEZ ARMANDO J , CARRALERO CESAR W
Abstract: A communication device (508) for use in a Time Division Multiplex (TDM) communication system (500) includes a transmitter, a receiver, and a frequency scanner for quickly scanning the radio frequency communication channels to determine an available channel. The communication device (508) also includes a phase locked loop (100) for providing a reference signal for the communication device (508) and locking to the available channel. This phase locked loop (100) includes a Voltage Control Oscillator (VCO) (104) having a control signal input (103). The phase locked loop (100) also includes a first filter (110) and a second filter (108). The first filter (110) has a wide frequency response. The second filter (108) includes a storage element (222) and has a narrow frequency response. The phase locked loop (100) also includes a switching circuit (106) which determines which one of the two filters (110, 108) gets coupled to the voltage control oscillator (104).
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