Variable inductor, oscillator including the variable...

Amplifiers – With plural amplifier channels – Redundant amplifier circuits

Reexamination Certificate

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C330S295000

Reexamination Certificate

active

07417501

ABSTRACT:
An amplifier comprises an amplifier circuit which comprises a first inductor as an impedance element for degeneration, and a control circuit which has a second inductor electro-magnetically connected to the first inductor, and changes a control current flowing through the second inductor to change an inductance value of the first inductor, thereby changing amplification characteristics of the amplifier circuit.

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Zhang, G. et al., “New Broadband Tunable Monolithic Microwave Floating Active Inductor.” Electronic Letters, vol. 28, No. 1, pp. 78-81, Jan. 2, 1992.
Fong, “Dual-Bank High-Linearity Variable-Gain Low-Noise Amplifiers for Wireless Applications,” IEEE International Solid-State Circuits Conference (1999), pp. 224-225.
Notification of Reasons for Rejection issued by the Japanese Patent Office, mailed Nov. 21, 2006, in Japanese Application No. 2003-150977 and English translation of Notification.

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