Radio-frequency signal generator

Details Radio-frequency signal generator Radio-frequency signal generator

1998-06-30

2000-04-04

Pascal, Robert

Oscillators

Automatic frequency stabilization using a phase or frequency...

Afc with logic elements

331 25, 327107, 375376, H03L 7093

Patent

active

06046643&

ABSTRACT:
A radio-frequency signal generator has a voltage-controlled oscillator for producing a radio-frequency signal. A frequency divider with a fixed division ratio has an input connected to the voltage-controlled oscillator and an output supplying a first clock signal. A first accumulator aggregates a first reference signal under the control of the first clock signal. A second accumulator aggregates a second reference signal under the control of a second clock signal. The aggregated signals are subtracted from one another, filtered through a digital filter, weighted and subsequently converted into an analog signal. The analog signal is filtered by an analog filter and fed to the voltage-controlled oscillator.

REFERENCES:
patent: 4145667 (1979-03-01), Messerschmitt
patent: 4706040 (1987-11-01), Mehrgardt
patent: 5373255 (1994-12-01), Bray et al.
patent: 5428308 (1995-06-01), Maeda
patent: 5638410 (1997-06-01), Kuddes
patent: 5656976 (1997-08-01), Jung et al.
patent: 5663685 (1997-09-01), Kesner
patent: 5898328 (1999-04-01), Shoji
"An Integrated Bipolar Transmitter for DECT", S. Heinen et al., IEEE Radio Frequency Integrated Circuits Symposium, 997, pp. 127-130; Date: Sep., 1997.

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