Wave transmission lines and networks – Negative resistance or reactance networks of the active type – Simulating specific type of reactance
Reexamination Certificate
2007-09-25
2007-09-25
Pascal, Robert (Department: 2817)
Wave transmission lines and networks
Negative resistance or reactance networks of the active type
Simulating specific type of reactance
C327S237000, C327S246000
Reexamination Certificate
active
10516631
ABSTRACT:
An amplifier circuit comprising a transconductor device connected to a phase shifter section. The phase shifter section has an adjustable phase shift and an impedance at least partially dependent of the frequency of an input signal. In use, the adjustable phase shift is adjusted to have substantially the opposite value of a phase shift of the transconductor device. In an embodiment, the phase shifter section comprises a capacitor device and an adjustable resistor device which comprises an amplifier device with an input contact for receiving a resistance control signal; a first output contact connected to the capacitor devices and a second output contact connected to the transconductor device. The amplifier circuit further comprises a control device for providing said resistance control signal to the input contact of the amplifier device.
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Danyuk D L et al: “The Design of a Correction Circuit for Sectional Low-Noise Amplifiers”, Telecommunications and Radio Engineering, Begell House, Inc., New York, NY, US, vol. 46, No. 12, Dec. 1, 1991, pp. 98-100, XP000311651, ISSN: 0040-2508, p. 98-p. 99.
European Patent Office, International Search Report for PCT/NL02/00359, dated Mar. 6, 2003.
Cameron Michael
Glenn Kimberly E
Pascal Robert
Telefonktiebolaget LM Ericsson (publ)
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