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US 9,537,457 B2Granted
High linearity push-pull common-gate amplifier
AssigneeIntel IP Corporation
InventorsVadim Issakov, Konrad Hirsch, Herbert Stockinger, Harald Doppke
Life of this patent
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Abstract
An amplifier operates to provide a high output impedance at an output through a push stage having a first transistor of a first transistor type and a pull stage having a second transistor of a second transistor type that is different from the first transistor type. The first transistor and the second transistor are coupled in a common-gate configuration. The first transistor and the second transistor are shorted together via a capacitor coupled to an input and share a common current path as a push-pull current-reusing common-gate low noise amplifier with a broadband input matching.
Claims19
An amplifier comprising:
- an input terminal configured to receive an input signal;
- an output terminal configured to drive an output signal;
- a first transistor comprising a first input contact coupled to the input terminal and a first output contact coupled to the output terminal;
- a second transistor including a second input contact coupled to the input terminal and a second output contact coupled to the first output contact of the first transistor and the output terminal;
- a current bias component, coupled to the first input contact of the first transistor, configured to provide a bias current to the first transistor and the second transistor along a same current path;
- a capacitor component, coupled between the first input contact of the first transistor and the second input contact of the second transistor, configured to short the input signal between the first input contact and the second input contact at an operating frequency range and provide the input signal to the first input contact and the second input contact;
- and
- a feedback path coupled between the output terminal and a first control contact of the first transistor or coupled between the output terminal and a second control contact of the second transistor, wherein the feedback path is configured to control a first bias to the first transistor or a second bias to the second transistor based on a reference voltage.
5 more elements
A communication system comprising:
- an input component configured to receive or transmit one or more input signals comprising:
- a baseband processor integrated on a single substrate configured to process the one or more input signals;
- an amplifier arranged in a common-gate configuration and configured to match an input impedance of the one or more input signals, the amplifier comprising:
- an amplifier input terminal configured to receive the one or more input signals;
- an amplifier output terminal configured to provide an output signal having a gain based on the one or more input signals;
- a push stage comprising a first transistor of a first transistor type coupled to a current supply via a current path;
- a pull stage comprising a second transistor of a second transistor type coupled to the push stage and to the current supply via the current path;
- a capacitor component, coupled between input contacts of the first transistor and the second transistor, configured to provide the one or more input signals at an operating frequency range to the push stage and the pull stage;
- and
- a feedback path coupled between the amplifier output terminal and a first gate contact of the first transistor or a second gate contact of the second transistor, wherein the feedback path is configured to control a first bias to the first transistor or a second bias to the second transistor based on a reference voltage.
7 more elements
A mobile communication device comprising:
- a transceiver component comprising at least one differential amplifier, comprising:
- a differential input having a p-input and an n-input;
- a differential output having an n-output and a p-output;
- and
- a first amplifier arranged between the p-input and the n-output and a second amplifier arranged between the n-input and the p-output, wherein the first amplifier and the second amplifier are in a common-gate configuration and respectively comprise:
- an amplifier input connected to the p-input or to the n-input;
- a push stage comprising a first transistor of a PMOS type that is coupled to a current bias;
- a pull stage comprising a second transistor of an NMOS type coupled in parallel to the push stage in a common gate configuration and to a current supply via a same current input path as the first transistor;
- and
- a capacitor component including at least one capacitor, coupled between input contacts of the first transistor and the second transistor, configured to concurrently provide one or more input signals at an operating frequency range to the push stage and the pull stage.
7 more elements
Dependencies are inferred from the claim text.