Wideband amplifier circuit
AssigneeApple Inc.
InventorsSong Hu, Sohrab Emami-Neyestanak
Life of this patent
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Abstract
An amplifier includes a first coil coupled to at least one input node. The amplifier further includes second and third coils. A first terminal of the second coil is coupled to a source terminal of a first transistor, while a second terminal of the second coil is coupled to a source terminal of a second transistor. A third coil includes first and second terminals coupled to gate terminals of the first and second transistors, respectively. Responsive to receiving an input signal, the first coil electromagnetically conveys the signal to the second and third coils.
Claims20
A circuit comprising:
- a first coil coupled to an input node;
- first and second transistors;
- a second coil having a first terminal coupled to a source terminal of the first transistor, and a second terminal coupled to a source terminal of the second transistor;
- a first capacitor coupled between a ground node and the first terminal of the second coil, and a second capacitor coupled between the ground node and the second terminal of the second coil;
- and
- a third coil having a first terminal coupled to a gate terminal of the first transistor, a second terminal coupled to a gate terminal of the second transistor;
- wherein, responsive to receiving an input signal, the first coil is configured to be electromagnetically convey the input signal to the second and third coils.
A method comprising:
- receiving an input signal at a first coil of an amplifier circuit;
- electromagnetically conveying the input signal to second and third coils of the amplifier circuit, wherein the second coil is coupled between a source terminal of a first transistor and a source terminal of a second transistor, the source terminals of the first and second transistors being capacitively coupled to ground by first and second capacitors, respectively, and wherein the third coil is coupled between respective gate terminals of the first and second transistors;
- and
- providing an output signal on respective drain terminals of the first and second transistors, wherein the output signal is an amplified version of the input signal.
An integrated circuit comprising:
- an amplifier circuit including:
- a first coil implemented on a first metal layer;
- a second coil implemented on a second metal layer;
- a first capacitor coupled between a ground node and a first terminal of the second coil;
- a second capacitor coupled between the ground node and the second terminal of the second coil;
- a third coil implemented on a third metal layer;
- a first transistor having a gate terminal coupled to the third coil, a source terminal coupled to the second coil, and a drain terminal coupled to a first output node;
- and
- a second transistor having a gate terminal coupled to the third coil, a source terminal coupled to the second coil, and a drain terminal coupled to a second output node;
- wherein responsive to receiving an input signal, the first coil is configured to electromagnetically convey the input signal to the second and third coils.
Dependencies are inferred from the claim text.