Low-power and area-efficient gain-bandwidth tripler amplifier
AssigneeIntel Corporation
InventorsSaurabh Anmadwar, Dheeraj Shetty, Madhuban Kishor
Life of this patent
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Abstract
An active current source load of a fully differential amplifier which is converted into a transconductance (gm) component also at higher frequency by feed-forwarding input signals to their gates. With signal coupling to gate, unity gain bandwidth (UGB) of the amplifier increases by a factor of two. In addition to this, the signal is coupled to source as well to achieve three-fold UGB enhancement. Thus, the effective trans-conductance is gmp at dc and becomes gmp+(gmngate+gmnsrc) at high frequency which triples the UGB when gmp=gmngate/src.
Claims23
An apparatus comprising:
- a first input and a second input;
- a first transconductance component and a second transconductance component;
- a first feedforward path where the first input is coupled to a gate of the first transconductance component;
- a second feedforward path where the second input is coupled to a gate of the second transconductance component;
- a first capacitor coupled to the second input and a source of the first transconductance component;
- and
- a second capacitor coupled to the first input and a source of the second transconductance component.
An apparatus comprising:
- a first input and a second input;
- and
- an amplifier to receive the first input and the second input, wherein the amplifier feed-forwards the first input to a gate of a first transconductance component and feed-forwards the second input to a gate of the second transconductance component, wherein the amplifier also feed-forwards the first input to a source of the first transconductance component and feed-forwards the second input to a source of the second transconductance component.
An apparatus comprising:
- a first input and a second input;
- a first transistor and a second transistor component;
- a first capacitor having a first terminal coupled to the first input and a second terminal coupled to a gate of the first transistor;
- a first capacitor having a first terminal coupled to the second input and a second terminal coupled to a gate of the second transistor;
- a third capacitor coupled to the second input and a source of the first transistor;
- and
- a second capacitor coupled to the first input and a source of the second transistor.
A system comprising:
- a memory;
- a processor coupled to the memory;
- and
- a wireless interface to allow the processor to communicate with another device, wherein the processor comprises a voltage gain amplifier which includes:
- a first input and a second input;
- a first transconductance component and a second transconductance component;
- a first feedforward path where the first input is coupled to a gate of the first transconductance component;
- a second feedforward path where the second input is coupled to a gate of the second transconductance component;
- a first capacitor coupled to the second input and a source of the first transconductance component;
- and
- a second capacitor coupled to the first input and a source of the second transconductance component.
Dependencies are inferred from the claim text.