Claims
- 1. A voltage-controlled capacitor, comprising:two varactors connected in parallel and having a capacitance, said two varactors being connected for controlling the capacitance with difference signals, and said two varactors including a first varactor having an nMOS layer sequence and a second varactor having a pMOS layer sequence.
- 2. The voltage-controlled capacitor according to claim 1, wherein the capacitance is controlled by the difference signals received between said two varactors.
- 3. The voltage-controlled capacitor according to claim 1, wherein said two varactors are formed from CMOS circuitry.
- 4. The voltage-controlled capacitor according to claim 1, wherein said two varactors are formed from BiCMOS circuitry.
Priority Claims (1)
Number |
Date |
Country |
Kind |
100 21 867 |
May 2000 |
DE |
|
CROSS-REFERENCE TO RELATED APPLICATION
This application is a continuation of copending International Application No. PCT/EP01/05035, filed May 4, 2001, which designated the United States and was not published in English.
US Referenced Citations (4)
Number |
Name |
Date |
Kind |
3808517 |
Fletcher et al. |
Apr 1974 |
A |
5130564 |
Sin |
Jul 1992 |
A |
5378937 |
Heidemann et al. |
Jan 1995 |
A |
6351020 |
Tarabbia et al. |
Feb 2002 |
B1 |
Foreign Referenced Citations (3)
Number |
Date |
Country |
0 902 483 |
Mar 1999 |
EP |
1 024 538 |
Aug 2000 |
EP |
07153978 |
Jun 1995 |
JP |
Non-Patent Literature Citations (2)
Entry |
Andreani, P.: “A Comparison between Two 1.8GHz CMOS VCOs Tuned by Different Varactors”, Proc. of the European Solid-State Circuits Conference (ESSCIRC'98), The Hague. Sep. 1998, pp. 380-383. |
Craninckx, J. et al.: “A 1.8GHz CMOS Low-Phase-Noise Voltage-Controlled Oscillator with Prescaler”, IEEE, vol. 30, No. 12, Dec. 1995, pp. 1474-1482. |
Continuations (1)
|
Number |
Date |
Country |
Parent |
PCT/EP01/05035 |
May 2001 |
US |
Child |
10/288388 |
|
US |