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US 6,794,934 B2Granted
High gain wideband driver amplifier
AssigneeiTerra Communications, LLC
InventorsAndrea Betti-Berutto, Stefano D'Agostino
Life of this patent
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Abstract
Methods and circuitry for implementing monolithic high gain wideband amplifiers. The invention implements an amplifier with a limiter that also performs a signal dividing function. In a specific embodiment, the limiter is designed to make available two in-phase outputs that are then used to drive two gate input lines of a combiner distributed amplifier.
Claims24
An amplifier circuit comprising:
- a limiter preamplifier including:
- a differential amplifier coupled to receive a differential input signal at its inputs, and configured to generate a differential output signal made up of a first output signal and a second output signal, and
- an output state having a first differential output amplifier coupled to the first output signal and a second differential output amplifier coupled to the second output signal;
- and
- a combiner distributed amplifier having a first input coupled to a first output of the first differential output amplifier, and a second input coupled to a first output of the second differential output amplifier,
- wherein the output of the first differential output amplifier and the output of the second differential output amplifier are of the same phase.
3 more elements
A method of amplifying a high frequency signal comprising:
- receiving a differential signal at differential inputs of a limiter circuit;
- performing a limiting function on the differential signal;
- using the limiter circuit to amplify the differential signal and to generate a pair of in-phase output signals;
- and
- applying, respectively, the pair of in-phase output signals to a pair of input terminals of a combiner distributed amplifier.
2 more elements
A limiter amplifier comprising:
- a differential amplifier coupled to receive a differential signal at its inputs and configured to generate a differential output signal made up of a first signal and a second signal;
- an output stage having a first differential output amplifier coupled to receive the first signal and a second differential output amplifier coupled to receive the second signal;
- and
- a combiner distributed amplifier having a first input coupled to receive the first mingle-ended output signal of the first differential output amplifier, and a second input coupled to receive the second singe-ended output signal of the second differential output amplifier,
- wherein, the first differential output amplifier comprises a first differential pair and is configured to generate a first single-ended output signal and the second differential output amplifier comprises a second differential pair and is configured to generate a second single-ended output signal that is in phase with the first single-ended output signal.
2 more elements
An amplifier circuit comprising:
- a first differential amplifier having a non-inverting input and an inverting input, and a non-inverting output and an inverting output;
- a second differential amplifier having an input coupled to the non-inverting output of the first differential amplifier, and a non-inverting output;
- a third differential amplifier having an input coupled to the inverting output of the first differential amplifier, and an veiling output;
- a combiner distribute amplifier having a first input coupled to the non-inverting output of the second differential puffer and a second input coupled to the inverting output of the third differential amplifier,
- wherein the input of the second differential amplifier and the input of the third differential amplifier are the same type of input, and
- wherein the first duff signal amplifier, the second differential amplifier and the third differential amplifier each comprise a differential pair.
3 more elements
Dependencies are inferred from the claim text.