Artificial Voltage-Controlled Capacitance and Inductance using Voltage-Controlled Transconductance
In this paper, a technique is proposed to implement
an artificial voltage-controlled capacitance or inductance which can
replace the well-known varactor diode in many applications. The
technique is based on injecting the current of a voltage-controlled
current source onto a fixed capacitor or inductor. Then, by controlling
the transconductance of the current source by an external bias voltage,
a voltage-controlled capacitive or inductive reactance is obtained.
The proposed voltage-controlled reactance devices can be designed
to work anywhere in the frequency spectrum. Practical circuits for the
proposed voltage-controlled reactances are suggested and simulated.
[1] K. R. Thrower, "History of tuning," IEE International Conference on 100
Years of radio, September, 1995.
[2] L. J. Giacoletto, and J. O-Connel, "A variable capacitance germanium
junction diode for UHF," RCA Review, vol. l7, March, 1956, pp. 68-85.
[3] B. Razavi, "Challenges in the design of frequency Synthesizers for
Wireless Application," in Proc. IEEE ClCC -97, May, 1997, pp. 395-402.
[4] K. Stadius, R. Kaunisto, and V. Porra, "A High frequency harmonic VCO
with an Artificial Varactor," in Proc. 5th ICECS -98, vol. 3, September,
1998, pp. 161-164.
[5] K. Stadius, R. Kaunisto, and V. Porra, "Varactor diodeless harmonic
VCOs for GHz-range applications," Analog Integrated Circuits and Signal
Processing, Vol. 27 , Issue 1-2, April/May 2001.
[6] W. Z. Chen, J. T. Wu, "A 2-V 2-GHz BJT variable frequency oscillator,"
IEEE JSSC, vol. 33, no. 9, 1998, pp. 1406-1410.
[1] K. R. Thrower, "History of tuning," IEE International Conference on 100
Years of radio, September, 1995.
[2] L. J. Giacoletto, and J. O-Connel, "A variable capacitance germanium
junction diode for UHF," RCA Review, vol. l7, March, 1956, pp. 68-85.
[3] B. Razavi, "Challenges in the design of frequency Synthesizers for
Wireless Application," in Proc. IEEE ClCC -97, May, 1997, pp. 395-402.
[4] K. Stadius, R. Kaunisto, and V. Porra, "A High frequency harmonic VCO
with an Artificial Varactor," in Proc. 5th ICECS -98, vol. 3, September,
1998, pp. 161-164.
[5] K. Stadius, R. Kaunisto, and V. Porra, "Varactor diodeless harmonic
VCOs for GHz-range applications," Analog Integrated Circuits and Signal
Processing, Vol. 27 , Issue 1-2, April/May 2001.
[6] W. Z. Chen, J. T. Wu, "A 2-V 2-GHz BJT variable frequency oscillator,"
IEEE JSSC, vol. 33, no. 9, 1998, pp. 1406-1410.
@article{"International Journal of Electrical, Electronic and Communication Sciences:61246", author = "Mansour I. Abbadi and Abdel-Rahman M. Jaradat", title = "Artificial Voltage-Controlled Capacitance and Inductance using Voltage-Controlled Transconductance", abstract = "In this paper, a technique is proposed to implement
an artificial voltage-controlled capacitance or inductance which can
replace the well-known varactor diode in many applications. The
technique is based on injecting the current of a voltage-controlled
current source onto a fixed capacitor or inductor. Then, by controlling
the transconductance of the current source by an external bias voltage,
a voltage-controlled capacitive or inductive reactance is obtained.
The proposed voltage-controlled reactance devices can be designed
to work anywhere in the frequency spectrum. Practical circuits for the
proposed voltage-controlled reactances are suggested and simulated.", keywords = "voltage-controlled capacitance, voltage-controlled inductance,varactor diode, variable transconductance.", volume = "2", number = "8", pages = "1699-4", }