Article | GigaHertz 2003. Proceedings from the Seventh Symposium | Tuned Active Inductor and Switched Bandpass Amplifier in CMOS Technology

Title:
Tuned Active Inductor and Switched Bandpass Amplifier in CMOS Technology
Author:
Markus Grözing: Institute of Electrical and Optical Communication Engineering, University of Stuttgart Daniel Moser: Institute of Electrical and Optical Communication Engineering, University of Stuttgart Manfred Berroth: Institute of Electrical and Optical Communication Engineering, University of Stuttgart
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Year:
2003
Conference:
GigaHertz 2003. Proceedings from the Seventh Symposium
Issue:
008
Article no.:
027
No. of pages:
4
Publication type:
Poster
Published:
2003-11-06
Series:
Linköping Electronic Conference Proceedings
ISSN (print):
1650-3686
ISSN (online):
1650-3740
Publisher:
Linköping University Electronic Press; Linköpings universitet


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A tunable differential active inductor and a switched bandpass amplifier in CMOS technology are presented. The active inductor is implemented in a 0;25 ¬Ķm CMOS technology at a supply voltage of 2;5 V. The measured lower end of the inductance tuning range is 3;2 nH with estimated resonant frequency of 5;6 GHz and a current consumption of 13 mA. The inductance value can be tuned up to 23 nH with a measured resonant frequency of 1;9 GHz and a current consumption of 1;9 mA. The switched differential bandpass amplifier is implemented in a 0;18 ¬Ķm CMOS technology at a supply voltage of 1;8 V. By activating the first or the second active inductor; the measured bandpass frequency can be switched between 100 MHz and 770 MHz. A modified switching concept of the active inductors can provide an amplifier with a bandpass frequency that can be switched between 125 MHz and 875 MHz in 125 MHz steps. Simulations indicate that the maximum gain is 16 dB for all 7 operation modes of the circuit.

GigaHertz 2003. Proceedings from the Seventh Symposium

Author:
Markus Grözing, Daniel Moser, Manfred Berroth
Title:
Tuned Active Inductor and Switched Bandpass Amplifier in CMOS Technology
References:

[1] A. Thanachayanont and A. Payne: “CMOS floating active inductor and its applications to bandpass filter and oscillator designs,” IEE Proceedings ‚ÄďCircuits, Devices and Systems, vol. 147, no. 1, pp. 42-48, February 2000


[2] Markus Gr√∂zing, Andreas Pascht, Manfred Berroth: “A 2.5 V CMOS Differential Active Inductor with tunable L and Q for Frequencies up to 5 GHz,” 2001 International Microwave Symposium Digest, vol. 1, pp.575-578 / 2001 RFIC Digest of Papers, pp. 271-274, Phoenix, Arizona, USA, May 20-22, 2001.


[3] F. Krummenacher and N. Joehl: “A 4-MHz CMOS Continuous-Time Filter with On-Chip Automatic Tuning”, IEEE Journal of Solid-State Circuits, vol. 23, no. 3, June 1988

GigaHertz 2003. Proceedings from the Seventh Symposium

Author:
Markus Grözing, Daniel Moser, Manfred Berroth
Title:
Tuned Active Inductor and Switched Bandpass Amplifier in CMOS Technology
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