Arrangement with a capacitor which can be connected into a...

Details Arrangement with a capacitor which can be connected into a... Arrangement with a capacitor which can be connected into a...

2007-02-20

2007-02-20

Pascal, Robert (Department: 2817)

Oscillators

With frequency adjusting means

With voltage sensitive capacitor

C331S03600C, C327S581000

Reexamination Certificate

active

11051221

ABSTRACT:
An arrangement and a method for connecting a capacitor into a circuit and disconnecting it therefrom are disclosed. The capacitor includes two capacitor elements, each with a main terminal and an auxiliary terminal. The auxiliary terminals are connected to one another at a reference node to which a control signal can be coupled as a function of the desired capacitance value. The capacitance value is tapped at the main terminals of the capacitor elements. When the capacitor is switched on, a high quality level is obtained, and when the capacitor is switched off, low parasitic capacitance components are obtained. For this reason the described arrangement is particularly suitable for use in voltage-controlled oscillators.

REFERENCES:
patent: 5926064 (1999-07-01), Hariton
patent: 6995626 (2006-02-01), Oehm et al.
patent: 7019598 (2006-03-01), Duncan et al.
patent: 7061340 (2006-06-01), Boccuzzi et al.
patent: 7109812 (2006-09-01), Brauchler
patent: 2001/0050598 (2001-12-01), Mourant et al.
patent: 2003/0141936 (2003-07-01), Staszewski et al.
patent: 2003/0189466 (2003-10-01), Kitamura
“A First Digitally-Controlled Oscillator in a Deep-Submicron CMOS Process for Multi-GHz Wireless Applications”, Robert B. Staszewski, Dirk Leipold, Chih-Ming Hung and Poras T. Balsara, IEEE Radio Frequency Integrated Circuits Symposium, Jun. 2003, pp. 81-84.

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