Circuit arrangement provided with a phase-locked loop and...

Details Circuit arrangement provided with a phase-locked loop and... Circuit arrangement provided with a phase-locked loop and...

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.

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