Patent ID: 8792198

Claim:
A balanced amplifier circuit for amplifying an input signal and for providing an output signal, the balanced amplifier circuit comprising: first and second input signal nodes; a first amplifier circuit including an input transistor and a cross-coupling transistor, the input transistor having a control terminal connected to the first input signal node, a first output terminal coupled to a first output terminal of the cross-coupling transistor, and a second output terminal coupled to a first power supply node; a second amplifier circuit including an input transistor and a cross-coupling transistor, the input transistor having a control terminal connected to the first input signal node, a first output terminal coupled to a first output terminal of the cross-coupling transistor, and a second output terminal coupled to the first power supply node; a first coupling circuit including a capacitor and a coupling transistor, the first coupling circuit being connected such that a control terminal of the coupling transistor is connected to the first input signal node and the capacitor is connected between a first output terminal of the coupling transistor and a control terminal of the cross-coupling transistor of the second amplifier circuit; and a second coupling circuit including a capacitor and a coupling transistor, the second coupling circuit being connected such that a control terminal of the coupling transistor is connected to the second input signal node and the capacitor is connected between a first output terminal of the coupling transistor and a control terminal of the cross-coupling transistor of the first amplifier circuit.