Patent · US Expired

Circuit arrangement provided with a phase-locked loop and transmitter-receiver with said circuit arrangement

US7430265B2 · kind B2 · utility

4Cited by

8References

13Claims

0Family size

Assignee

Infineon Technologies AG · DE

Inventors

Thomas Convent · Issum, DE
Markus Hammes · Dinslaken, DE
Andre Hanke · Mülheim an der Ruhr, DE
Giuseppe Puma · Bochum, DE
Walter Mevissen · Mülheim an der Ruhr, DE

Key dates

Filing date	Dec 21, 2004
Grant date	Sep 30, 2008
Priority date	—
Expiry date	Apr 11, 2026

Classification

Technology area (CPC H)Electricity
CPC primaryH04B1/403
WIPO fieldBasic communication processes
WIPO sectorElectrical engineering

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.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.