Differential amplifier and radio system with a differential amplifier
AssigneeATMEL Germany GmbH
InventorWolfram Kluge
Life of this patent
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Abstract
A radio system for communication is provided that has a differential amplifier for amplifying a transmission frequency, particularly 2.4 GHz, wherein the differential amplifier has a first inductor, which is magnetically coupled to a second inductor, and a capacitor. The capacitor, the first inductor, and the second inductor are wired into a resonant circuit in such a way that the resonant circuit has a common-mode impedance for a common-mode signal and a push-pull impedance, different from the common-mode impedance, for the push-pull signal.
Claims21
A differential amplifier comprising:
- a first inductor that is magnetically coupled to a second inductor;
- and
- a capacitor,
- wherein the capacitor, the first inductor, and the second inductor are wired into a resonant circuit so that the resonant circuit has a common-mode impedance for a common-mode signal and a push-pull impedance, which is different than the common-mode impedance, for a push-pull signal.
The differential amplifier according to any 13, further comprising an additional resonant circuit that is a load for the second amplifier stage, wherein the additional resonant circuit is connected to the third transistor and the fourth transistor or to the fifth transistor and the sixth transistor to form the second amplifier stage.
A radio system for communication, comprising a differential amplifier for amplifying a transmission frequency, the differential amplifier comprising:
- a first inductor that is magnetically coupled to a second inductor;
- and
- a capacitor,
- wherein the capacitor, the first inductor, and the second inductor are wired into a resonant circuit so that the resonant circuit has a common-mode impedance for a common-mode signal and a push-pull impedance, which is different from the common-mode impedance, for a push-pull signal.
Dependencies are inferred from the claim text.