Pulse or digital communications – Synchronizers – Phase displacement – slip or jitter correction
Reexamination Certificate
2008-09-30
2008-09-30
Tran, Khai (Department: 2611)
Pulse or digital communications
Synchronizers
Phase displacement, slip or jitter correction
C327S147000
Reexamination Certificate
active
11018379
ABSTRACT:
The invention specifies a circuit arrangement with a phase locked loop (1), which can be used as a mobile radio transmitter, in particular. The reference frequency for the PLL (1), which is provided by means of the source (3), is multiplied by a multiplier (10) and is down-converted to an intermediate-frequency level in a down-conversion mixer (9) using the output signal from the PLL, and is evaluated such that a modulator (13) connected to the input of the oscillator (6) can be trimmed. The inventive principle is used to advantage in two-point modulators and allows inexpensive, integratable mobile radio transmitters with good noise characteristics.
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“Frequenzmodulation”, E. G. Woschni, VEB Verlag Technik, Berlin, 1960, 7 pgs.
Convent Thomas
Hammes Markus
Hanke Andre
Li Puma Giuseppe
Mevissen Walter
Eschweiler & Associates LLC
Infineon - Technologies AG
Tran Khai
LandOfFree
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