H - Electricity – 03 – B
Patent
H - Electricity
03
B
H03B 5/02 (2006.01) H03B 27/00 (2006.01)
Patent
CA 2132107
A resonant circuit comprises first (600) and second (600') amplifiers. An input of the second amplifier is coupled to an out- put of the first amplifier, and an output of the second amplifier is cross-coupled to an input of the first amplifier. The first ampli- fier has a first gain and a 90 degree phase shift between its input and its output at a resonant frequency of the resonant circuit. The second amplifier has a second gain and a 90 degree phase shift between its input and its output at the resonant frequency of the resonant circuit. The second gain is different from the first gain. The resonant circuit can have a first port (Ap, An) and sec- ond ports (Bp, Bn) coupled to an input and an output respectively of one of the first and second amplifiers. Because the gains of the first and second amplifiers differ, the gain from the first port to the second port of the resonant circuit will dif- fer from the gain from the second port to the first port. This gain difference is useful for enhancing the quality factor Q of multiple resonator circuits constructed from such resonant circuits.
Junkin Charles William
Nortel Networks Limited
LandOfFree
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