Measured CMOS Switched High-Quality Capacitors in a Reconfigurable Matching Network
Författare
Summary, in English
Switched capacitors are here investigated for use in reconfigurable matching networks, particularly for DVB-H frequencies. A 0.13 um CMOS circuit is evaluated through both simulations and measurements. Source grounded NMOS transistors are used to switch high quality metal capacitors located above metal layer 8. The quality factor and tuning range depend on frequency, switch voltage, capacitor size, and transistor width. There is a clear trade-off between quality factor and tuning range, and measurements show quality factors above 50, 100, and 150 at tuning ranges of 3.9, 2.4, and 1.6, respectively. A reconfigurable matching network with the switched capacitors has been realized using external inductors and the measured matching domain for the DVB-H frequency band is shown. The total loss of the network is 1.0 dB, a result of the high quality switched capacitors.
Publiceringsår
2007
Språk
Engelska
Sidor
858-862
Publikation/Tidskrift/Serie
IEEE Transactions on Circuits and Systems II: Express Briefs
Volym
54
Issue
10
Dokumenttyp
Artikel i tidskrift
Förlag
IEEE - Institute of Electrical and Electronics Engineers Inc.
Ämne
- Electrical Engineering, Electronic Engineering, Information Engineering
Nyckelord
- matching
- MEMS
- CMOS
- switched capacitor
- DVB-H
Status
Published
ISBN/ISSN/Övrigt
- ISSN: 1549-7747