Telecommunications – Receiver or analog modulated signal frequency converter – Local control of receiver operation
Patent
1997-10-23
2000-12-05
Eisenzopf, Reinhard J.
Telecommunications
Receiver or analog modulated signal frequency converter
Local control of receiver operation
455264, 327157, 331 17, H04B 160, H03L 706
Patent
active
061578215
ABSTRACT:
When attempting to reduce the number of battery cells in cellular telephones, a frequency synthesizer or phase locked loop located within the cellular telephone will output an increasing amount of noise. In order to reduce the amount of noise output when reducing the number of battery cells in such systems, the present invention employs a voltage step up device which effectively increases the voltage range of a voltage controlled oscillator within the frequency synthesizer. To further reduce the noise, the voltage step-up unit is employed with passive elements thus reducing the noise further and optimizing the output of the phase locked loop. Several different designs are discussed to further reduce space requirements and increase programmability of the system.
REFERENCES:
patent: 4281259 (1981-07-01), Ozawa
patent: 4736167 (1988-04-01), Kojima et al.
patent: 4755774 (1988-07-01), Heck
patent: 4803612 (1989-02-01), Skovmand
patent: 4893094 (1990-01-01), Herold et al.
patent: 5157354 (1992-10-01), Saiki et al.
patent: 5315623 (1994-05-01), Kuo
patent: 5339050 (1994-08-01), Llewellyn
patent: 5359300 (1994-10-01), Minami
patent: 5581214 (1996-12-01), Iga
patent: 5623523 (1997-04-01), Gehrke
patent: 5635776 (1997-06-01), Imi
patent: 5692023 (1997-11-01), Clark
patent: 5757240 (1998-05-01), Boerstler et al.
patent: 5774023 (1998-06-01), Irwin
patent: 5815042 (1998-09-01), Chow et al.
patent: 5818303 (1998-10-01), Oishi et al.
patent: 5831483 (1998-11-01), Fukuda
patent: 5838180 (1998-11-01), Partyka
Motorola HT 1000, MT 2000, MTS 2000 and MTX Series Handie-Talkie Portable Radios Theory/Troubleshooting Manual (1993), Motorola, Inc., pp. 12-13.
NUD7070A VHF Transciever Board Component Location Diagrams and Schematic Diagram.
Boesch Ronald D.
Koszarsky Christopher
Appiah Charles N.
Eisenzopf Reinhard J.
Ericsson Inc.
LandOfFree
Voltage step up for a low voltage frequency synthesizer architec does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Voltage step up for a low voltage frequency synthesizer architec, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Voltage step up for a low voltage frequency synthesizer architec will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-969307