Frequency-doubling circuit arrangement, and mobile radio...

Details Frequency-doubling circuit arrangement, and mobile radio... Frequency-doubling circuit arrangement, and mobile radio...

2007-07-03

2007-07-03

Trinh, Sonny (Department: 2618)

Telecommunications

Transmitter

Angle modulation

C455S190100, C455S130000

Reexamination Certificate

active

10940103

ABSTRACT:
One or more aspects of the present invention are directed to a frequency-doubling circuit arrangement that doubles the frequency of a signal applied to its input, and presents that doubled frequency signal at its output. A rectifier that rectifies the input signal as a function of a reference variable is provided for coupling the input and output. A regulator is used to supply the reference variable to a control input of the rectifier. A control loop is designed so that even-numbered higher harmonics in the output signal disappear or are greatly suppressed. Since the frequency-doubling circuit described has a low power consumption in conjunction with a smaller chip area, it is particularly suitable for installation in mobile radios for conditioning carrier frequencies and local oscillator frequencies.

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“A DC to X-Band Frequency Doubler Using GaAs HBT MMIC”, Xiangdong Zhang and Yong-Hoon Yun, Microwave Symposium Digest, IEEE, Jun. 1997, pp. 1213-1216.
International Search Report, Int'l Application No. PCT/DE03/00477, 2 pgs.

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